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NSR database version of April 11, 2024.

Search: Author = A.Goergen

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2023LA08      Phys.Rev. C 108, 025804 (2023)

A.C.Larsen, G.M.Tveten, T.Renstrom, H.Utsunomiya, E.Algin, T.Ari-izumi, K.O.Ay, F.L.Bello Garrote, L.Crespo Campo, F.Furmyr, S.Goriely, A.Gorgen, M.Guttormsen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, T.Laplace, E.Lima, M.Markova, J.E.Midtbo, S.Miyamoto, A.H.Mjos, V.Modamio, M.Ozgur, F.Pogliano, S.Riemer-Sorensen, E.Sahin, S.Shen, S.Siem, A.Spyrou, M.Wiedeking

New experimental constraint on the ¹⁸⁵W(n, γ)¹⁸⁶W cross section

NUCLEAR REACTIONS ^182,183,184W(γ, n), E=6.5-13 MeV; measured In, En; deduced σ(E), γ-ray strength function (GSF). ¹⁸⁶W(α, α'γ), E=30 MeV; measured Eα, Iα, Eγ, Iγ, αγ-coin; deduced nuclear level density (NLD), γ-ray strength function (GSF). ¹⁸⁵W(n, γ), T=0.5-1.1 GK; calculated Maxwellian averaged σ(E) (MACS), reaction rate (stellar reactivity), compared with experimental results, and recommended σ in compilations by Bao et al. Comparison to other experimental data, TALYS calculations and KADONIS-1.0 data. Photoneutron reactions were measured with quasi-monochromatic photon beam at NewSubaru synchrotron radiation facility using 4π detector consisting of 20 ³He proportional counters. Experiment on inelastic α-scattering was performed at the Oslo Cyclotron Laboratory (OCL) using CACTUS NaI(Tl) scintillator γ-ray detector array, the Silicon Ring (SiRi) detector array and beam from MC-35 Scanditronix cyclotron.

doi: 10.1103/PhysRevC.108.025804
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2023LE07      Eur.Phys.J. A 59, 134 (2023)

A.Lemasson, J.Dudouet, M.Rejmund, J.Ljungvall, A.Gorgen, W.Korten

Advancements of γ-ray spectroscopy of isotopically identified fission fragments with AGATA and VAMOS++

doi: 10.1140/epja/s10050-023-01053-0
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2023MA33      Phys.Rev. C 108, 014315 (2023)

M.Markova, A.C.Larsen, G.M.Tveten, P.von Neumann-Cosel, T.K.Eriksen, F.L.Bello Garrote, L.Crespo Campo, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, M.Klintefjord, T.Renstrom, E.Sahin, S.Siem, T.G.Tornyi

Nuclear level densities and γ-ray strength functions of ^{111, 112, 113}Sn isotopes studied with the Oslo method

NUCLEAR REACTIONS ¹¹²Sn(p, p'γ), E=25 MeV;¹¹²Sn(p, dγ), E=16 MeV;¹¹³Sn(d, pγ), E=11.5 MeV; measured reaction products, charged particles, deuteron spectra, Ep, Ip, Eγ, Iγ, pγ-coin, (deuteron)γ-coin. ^111,112,113Sn; deduced nuclear level density, experimental entropy, γ-strength functions, parameters of isovector giant dipole resonance, E1 and M1 strength distributions. Oslo method type of analysis. Comparison to the data obtained with different methods and to the data on the other isotopes from Sn chain. All three nuclei demonstrate a trend compatible with the constant-temperature model. CACTUS NaI(Tl) scintillator γ-ray detector array and the Silicon Ring (SiRi) detector array at MC-35 Scanditronix cyclotron.

doi: 10.1103/PhysRevC.108.014315
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2023MU01      Phys.Rev. C 107, L011602 (2023)

D.Mucher, A.Spyrou, M.Wiedeking, M.Guttormsen, A.C.Larsen, F.Zeiser, C.Harris, A.L.Richard, M.K.Smith, A.Gorgen, S.N.Liddick, S.Siem, H.C.Berg, J.A.Clark, P.A.DeYoung, A.C.Dombos, B.Greaves, L.Hicks, R.Kelmar, S.Lyons, J.Owens-Fryar, A.Palmisano, D.Santiago-Gonzalez, G.Savard, W.W.von Seeger

Extracting model-independent nuclear level densities away from stability

RADIOACTIVITY ⁷⁶Ga(β^-); analyzed experimental total absorption spectrum (TAS) data in 2016Do05: Phys. Rev. C 93, 064317. ⁷⁶Ge; deduced γ-strength function (γSF), nuclear level density (NLD). Comparison to other experimental data and to γ-strength function in ⁷⁴Ge. ⁸⁸Br(β^-); measured Eγ, Iγ, TAS spectrum using Summing NaI (SuN) detector at Argonne CARIBU facility. ⁸⁸Kr; deduced γ-strength function (γSF), nuclear level density (NLD). Compared with other experimental data γ-strength functions for ⁸⁶Kr and ⁸⁷Kr. NLD results are compared to calculations done with 3 semi-microscopic models - HFB+Skyrme, HFB+Skyrme combinatorial, temperature-dependent HFB+Gogny. Combination of "shape" method with β-Oslo technique which allows extraction of NLD in model independent way.

NUCLEAR REACTIONS ⁸⁷Kr(n, γ), E<1 MeV; calculated σ(E) using newly obtained NLD. Values are given relative to calculated ones using current RIPL-3 recommended level densities.

doi: 10.1103/PhysRevC.107.L011602
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2023PA40      Eur.Phys.J. A 59, 276 (2023)

G.Pasqualato, S.Ansari, J.S.Heines, V.Modamio, A.Gorgen, W.Korten, J.Ljungvall, E.Clement, J.Dudouet, A.Lemasson, T.R.Rodriguez, J.M.Allmond, T.Arici, K.S.Beckmann, A.M.Bruce, D.Doherty, A.Esmaylzadeh, E.R.Gamba, L.Gerhard, J.Gerl, G.Georgiev, D.P.Ivanova, J.Jolie, Y.-H.Kim, L.Knafla, A.Korichi, P.Koseoglou, M.Labiche, S.Lalkovski, T.Lauritsen, H.-J.Li, L.G.Pedersen, S.Pietri, D.Ralet, J.M.Regis, M.Rudigier, S.Saha, E.Sahin, S.Siem, P.Singh, P.-A.Soderstrom, C.Theisen, T.Tornyi, M.Vandebrouck, W.Witt, M.Zielinska, D.Barrientos, P.Bednarczyk, G.Benzoni, A.J.Boston, H.C.Boston, A.Bracco, B.Cederwall, M.Ciemala, G.de France, C.Domingo-Pardo, J.Eberth, A.Gadea, V.Gonzalez, A.Gottardo, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, S.M.Lenzi, S.Leoni, R.Menegazzo, D.Mengoni, C.Michelagnoli, D.R.Napoli, J.Nyberg, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, K.Rezynkina, M.D.Salsac, E.Sanchis, M.Senyigit, M.Siciliano, J.Simpson, D.Sohler, O.Stezowski, J.J.Valiente-Dobon, D.Verney

Shape evolution in even-mass ^98-104Zr isotopes via lifetime measurements using the γγ coincidence technique

NUCLEAR REACTIONS ⁹Be(²³⁸U, X)⁹⁸Zr/¹⁰⁰Zr/¹⁰²Zr/¹⁰⁴Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin. ¹⁰⁴Mo, ¹⁰²Nb; deduced γ-ray energies and relative intensities, J, π, level T_1/2, B(E2), shape coexistence. Comparison with calculated values. The Differential Decay Curve Method (DDCM), the Recoil Distance Doppler Shift technique. The magnetic spectrometer VAMOS++, GANIL, the Orsay Universal Plunger system.

doi: 10.1140/epja/s10050-023-01172-8
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Data from this article have been entered in the XUNDL database. For more information, click here.

2023PE06      Phys.Rev. C 107, 044301 (2023)

L.G.Pedersen, E.Sahin, A.Gorgen, F.L.Bello Garrote, Y.Tsunoda, T.Otsuka, M.Niikura, S.Nishimura, Z.Xu, H.Baba, G.Benzoni, F.Browne, A.M.Bruce, S.Ceruti, F.C.L.Crespi, R.Daido, G.de Angelis, M.-C.Delattre, Zs.Dombradi, P.Doornenbal, Y.Fang, S.Franchoo, G.Gey, A.Gottardo, T.Isobe, P.R.John, H.S.Jung, I.Kojouharov, T.Kubo, N.Kurz, I.Kuti, Z.Li, G.Lorusso, I.Matea, K.Matsui, D.Mengoni, T.Miyazaki, V.Modamio, S.Momiyama, A.I.Morales, P.Morfouace, D.R.Napoli, F.Naqvi, H.Nishibata, A.Odahara, R.Orlandi, Z.Patel, S.Rice, H.Sakurai, H.Schaffner, L.Sinclair, P.-A.Soderstrom, D.Sohler, I.G.Stefan, T.Sumikama, D.Suzuki, R.Taniuchi, J.Taprogge, Z.Vajta, J.J.Valiente-Dobon, H.Watanabe, V.Werner, J.Wu, A.Yagi, M.Yalcinkaya, R.Yokoyama, K.Yoshinaga

First spectroscopic study of odd-odd ⁷⁸Cu

RADIOACTIVITY ⁷⁸Ni(β^-)[from ⁹Be(²³⁸U, X), E=345 MeV/nucleon]; measured Eγ, Iγ, βγ-coin, γγ-coin; deduced β-feeding, γ-transition intensities. ⁷⁸Cu; deduced levels J, π, T_1/2 of isomer state. Comparison with Monte Carlo shell model (MCSM) calculations. Wide-range active silicon-strip stopper array for beta and ion detection (WAS3ABi) with EURICA HPGe cluster det ector array at RIBF (RIKEN).

NUCLEAR STRUCTURE ⁷⁸Cu; calculated levels, J, π, occupation numbers of proton and neutron orbitals, excitation energies of the negative-parity multiplets, configurations. Monte Carlo shell model calculations performed using A3DA-m interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.107.044301
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Data from this article have been entered in the XUNDL database. For more information, click here.

2023PO02      Phys.Rev. C 107, 034605 (2023)

F.Pogliano, F.L.Bello Garrote, A.C.Larsen, H.C.Berg, D.Gjestvang, A.Gorgen, M.Guttormsen, V.W.Ingeberg, T.W.Johansen, K.L.Malatji, E.F.Matthews, M.Markova, J.E.Midtbo, V.Modamio, L.G.Pedersen, E.Sahin, S.Siem, T.G.Tornyi, A.S.Voyles

Observation of a candidate for the M1 scissors resonance in odd-odd ¹⁶⁶Ho

NUCLEAR REACTIONS ¹⁶³Dy(α, pγ), E=26 MeV; measured Eγ, Iγ, Ep, Ip, Eα, Iα, pγ-coin, pαγ-coin. ¹⁶⁶Ho; deduced nuclear level density (NLD), gamma strength function (GSF), resonance components of the GSF (Giant Dipole Re sonance, Pigmy Dipole Resonance, M1 scissors resonance), B(M1), parameters of s cissor resonance. Oslo method type of analysis. Systematics of scissor resonances is Ho, Sm, Dy, Er isotopes. Comparison to TALYS 1.95 calculations and other experimental data. Oslo Scintillator Array (OSCAR) of 30 cylindrical LaBr₃:Ce detectors and silicon ring (SiRi) consisting of 8 silicon-telescope modules at the Oslo Cyclotron Laboratory (OCL).

doi: 10.1103/PhysRevC.107.034605
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Data from this article have been entered in the XUNDL database. For more information, click here.

2023PO08      Phys.Rev. C 107, 064614 (2023)

F.Pogliano, A.C.Larsen, S.Goriely, L.Siess, M.Markova, A.Gorgen, J.Heines, V.W.Ingeberg, R.G.Kjus, J.E.L.Larsson, K.C.W.Li, E.M.Martinsen, G.J.Owens-Fryar, L.G.Pedersen, S.Siem, G.S.Torvund, A.Tsantiri

Experimentally constrained ^{165, 166}Ho(n, γ) rates and implications for the s process

NUCLEAR REACTIONS ¹⁶⁴Dy(α, pγ)¹⁶⁷Ho, E=26 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin. ¹⁶⁷Ho; deduced nuclear level density (NLD) and γ-ray strength function, resonance components of the GSF (Giant Dipole Resonance, Pigmy Dipole Resonance, M1 scissors resonance), upward scissor resonance strength. ^165,166Ho(n, γ), E=0.001-10 MeV; calculated σ(E) using obtained NLD and GSF (for ¹⁶⁷Ho from present work, for ¹⁶⁶Ho - from 2023PO02), Maxwellian-averaged σ(E) MACS (kT<105 keV). Oslo method type of analysis. Comparison with other experimental data and TALYS calculations. Comparison of obtained MACS with JINA REACLIB, BRUSLIB and KADONIS data. AGB nucleosynthesis predictions with STARERVOL code using obtained MACS. Oslo SCintillator ARray (OSCAR) and the Silicon Ring (SiRi) detector arrays at MC-35 Scanditronix cyclotron.

doi: 10.1103/PhysRevC.107.064614
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2023SI08      Phys.Rev. C 107, 054305 (2023)

J.Simpson, M.A.Riley, A.Pipidis, E.S.Paul, X.Wang, P.J.Nolan, J.F.Sharpey-Schafer, A.Aguilar, D.E.Appelbe, A.D.Ayangeakaa, A.J.Boston, H.C.Boston, D.B.Campbell, M.P.Carpenter, C.J.Chiara, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, U.Garg, A.Gorgen, D.J.Hartley, R.V.F.Janssens, D.T.Joss, D.S.Judson, F.G.Kondev, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, J.T.Matta, J.Ollier, M.Petri, J.P.Revill, L.L.Riedinger, S.V.Rigby, C.Teal, P.J.Twin, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson

Evolution of structure and shapes in ¹⁵⁸Er to ultrahigh spin

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 4n)¹⁵⁸Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). ¹⁵⁸Er; deduced levels, J, π, high-spin states, angular intensity ratios, δ, B(M1/E2) ratios, nuclear shapes, alignments, rotational bands, configurations, band terminating states and feeding, transition quadrupole moments for triaxial strongly deformed bands, moment of inertia. Comparison with cranked Nilsson-Strutinski calculations. Systematics of triaxial strongly deformed bands in ¹⁵⁸Er, ¹⁶⁰Er, ¹⁵²Dy, ¹⁶³Lu. Gammasphere array of escape-suppressed HPGe detectors at 88-inch cyclotron-LBNL and ATLAS-ANL facilities.

doi: 10.1103/PhysRevC.107.054305
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022BE24      Phys.Lett. B 834, 137479 (2022)

F.L.Bello Garrote, A.Lopez-Martens, A.C.Larsen, I.Deloncle, S.Peru, F.Zeiser, P.T.Greenlees, B.V.Kheswa, K.Auranen, D.L.Bleuel, D.M.Cox, L.Crespo Campo, F.Giacoppo, A.Gorgen, T.Grahn, M.Guttormsen, T.W.Hagen, L.Harkness-Brennan, K.Hauschild, G.Henning, R.-D.Herzberg, R.Julin, S.Juutinen, T.A.Laplace, M.Leino, J.E.Midtbo, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, T.Renstrom, K.Rezynkina, M.Sandzelius, J.Saren, C.Scholey, S.Siem, J.Sorri, S.Stolze, J.Uusitalo

Experimental observation of the M1 scissors mode in ²⁵⁴No

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=220, 222 MeV; ¹⁵⁴Sm(⁴⁸Ca, 6n)¹⁹⁶Pb, E not given; measured Eγ, Iγ, prompt and recoil-gated γ-ray singles spectra, polarization asymmetries of discreet γ rays in ²⁵⁴No and ¹⁹⁶Pb; deduced experimental γ-ray yield and compared with simulated γ spectra using RAINIER code, γ-strength function (γSF), B(M1), B(E1), widths, scissors mode of excitation in ²⁵⁴No. Comparison with BSFG + E1SLO + M1SLO model combination; tested parameters for the GDR and the spin-flip resonance by HFB calculations. Comparison of B(M1) strength with QRPA calculations.

doi: 10.1016/j.physletb.2022.137479
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022GU17      Phys.Rev. C 106, 034314 (2022)

M.Guttormsen, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, H.C.Berg, L.Crespo Campo, T.Dahl-Jacobsen, F.W.Furmyr, D.Gjestvang, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, M.Klintefjord, M.Markova, J.E.Midtbo, V.Modamio, W.Paulsen, L.G.Pedersen, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking

Evolution of the γ-ray strength function in neodymium isotopes

NUCLEAR REACTIONS ^{142,144,146,148,150}Nd(p, p'γ), (d, pγ), E(p)=16.0 MeV, E(d)=13.5 MeV; measured Eγ, Iγ, E(p), pγ-coin using SiRi array of 64 ΔE-E particle telescopes, and OSCAR array of 15 to 30 LaBr₃(Ce) scintillators for γ detection at the Oslo Cyclotron Laboratory. ^{142,144,145,146,147,148,149,150,151}Nd; deduced energies, widths and cross sections of giant dipole resonances (GDR), pygmy-dipole resonances (PDR), scissors mode (SM) resonances, low-energy enhancement (LEE) structures, average probability for populating levels, γ strength functions as function of Eγ, (γSF(Eγ)) and nuclear level densities (NLD) using the OSLO method, integrated LEE and SM strengths B(M1), cross over from spherical to deformed shapes for neodymium isotopes.

doi: 10.1103/PhysRevC.106.034314
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2022MA47      Phys.Rev. C 106, 034322 (2022); Erratum Phys.Rev. C 109, 019901 (2024)

M.Markova, A.C.Larsen, P.von Neumann-Cosel, S.Bassauer, A.Gorgen, M.Guttormsen, F.L.Bello Garrote, H.C.Berg, M.M.Bjoroen, T.K.Eriksen, D.Gjestvang, J.Isaak, M.Mbabane, W.Paulsen, L.G.Pedersen, N.I.J.Pettersen, A.Richter, E.Sahin, P.Scholz, S.Siem, G.M.Tveten, V.M.Valsdottir, M.Wiedeking

Nuclear level densities and γ-ray strength functions in ^{120, 124}Sn isotopes: Impact of Porter-Thomas fluctuations

NUCLEAR REACTIONS ^120,124Sn(p, p'γ), E=16 MeV; measured Eγ, Iγ, E(p), pγ-coin, E-ΔE distributions using an array of 64 ΔE-E particle telescopes, and OSCAR array of 30 LaBr₃(Ce) scintillators for γ detection at the Oslo Cyclotron Laboratory. ^120,124Sn; deduced γ strength functions as function of Eγ, (γSF(Eγ)) and nuclear level densities (NLD) using the OSLO method and shape methods, magnitude of the Porter-Thomas (PT) fluctuations. ^120,122,124Sn; deduced 0+ states, and first 2+ state in ¹²⁴Sn. Comparison of nuclear level densities for J=1 states with the constant temperature (CT) model, back-shifted Fermi gas model (BSFG) model calculations, and predictions of the microscopic Hartree-Fock-BCS method, and with previous experimental results. Systematics of average total radiative widths and nuclear level densities (NLD) for ^{113,114,115,116,117,118,119,120,121,123,124}Sn.

doi: 10.1103/PhysRevC.106.034322
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2022PO05      Phys.Rev. C 106, 015804 (2022)

F.Pogliano, A.C.Larsen, F.L.Bello Garrote, M.M.Bjoroen, T.K.Eriksen, D.Gjestvang, A.Gorgen, M.Guttormsen, K.C.W.Li, M.Markova, E.F.Matthews, W.Paulsen, L.G.Pedersen, S.Siem, T.Storebakken, T.G.Tornyi, J.E.Vevik

Indirect measurement of the (n, γ) ¹²⁷Sb cross section

NUCLEAR REACTIONS ¹²⁴Sn(α, pγ), E=24 MeV; measured Eγ, Iγ, Ep, Ip, pγ-coin. ¹²⁷Sb; deduced gamma strength function (GSF), nuclear level densities (NLD). Oslo method analysis. ¹²⁶Sb(n, γ), E ∼ 30 keV; deduced Maxwellian-averaged σ using obtained GSF and NLD. Comparison to other experimental data and TALYS calculations. MACS for ¹²⁶Sb(n, γ) is compared with evaluated values from JINA REACLIB rates, TENDL-19, BRUSLIB, ENDF/B-VIII.0 and TALYS predictions . Oslo SCintillator ARray (OSCAR) and the Silicon Ring (SiRi) detector arrays at MC-35 Scanditronix cyclotron (OCL).

doi: 10.1103/PhysRevC.106.015804
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2021GJ01      Phys.Rev. C 103, 034609 (2021)

D.Gjestvang, S.Siem, F.Zeiser, J.Randrup, R.Vogt, J.N.Wilson, F.Bello-Garrote, L.A.Bernstein, D.L.Bleuel, M.Guttormsen, A.Gorgen, A.C.Larsen, K.L.Malatji, E.F.Matthews, A.Oberstedt, S.Oberstedt, T.Tornyi, G.M.Tveten, A.S.Voyles

Excitation energy dependence of prompt fission γ-ray emission from ²⁴¹Pu

NUCLEAR REACTIONS ²⁴⁰Pu(d, pF)²⁴¹Pu^*, E=13.5 MeV; measured outgoing protons using SiRi, a silicon ΔE-E detector, fission fragments using NIFF, consisting of four parallel plate avalanche counters (PPACs), prompt fission γ rays (PFG), (particle)γ-coin using Oslo Scintillator Array (OSCAR) of 30 LaBr₃:Ce scintillators for γ radiation at the Oslo Cyclotron Laboratory; deduced average total PFG multiplicity per fission, average total PFG energy released per fission, and the average PFG energy in the excitation range of 5.75-8.25 MeV. Comparison with simulations using the fission model FREYA, with previous experimental results, and evaluation in ENDF/B-VIII.0.

doi: 10.1103/PhysRevC.103.034609
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23783.

2021GU12      Phys.Lett. B 816, 136206 (2021)

M.Guttormsen, Y.Alhassid, W.Ryssens, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, L.Crespo Campo, T.Dahl-Jacobsen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, M.Klintefjord, J.E.Midtbo, V.Modamio, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser

Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes

NUCLEAR REACTIONS ^{142,144,146,148,150}Nd(p, X), E=16 MeV; ^{142,144,146,148,150}Nd(α, X), E=13.5 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, nuclear level densities, quadrupole deformation parameters. Comparison with the shell model Monte Carlo (SMMC) calculations.

doi: 10.1016/j.physletb.2021.136206
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2021MA04      Phys.Rev. C 103, 014309 (2021)

K.L.Malatji, K.S.Beckmann, M.Wiedeking, S.Siem, S.Goriely, A.C.Larsen, K.O.Ay, F.L.Bello Garrote, L.Crespo Campo, A.Gorgen, M.Guttormsen, V.W.Ingeberg, P.Jones, B.V.Kheswa, P.von Neumann-Cosel, M.Ozgur, G.Potel, L.Pellegri, T.Renstrom, G.M.Tveten, F.Zeiser

Statistical properties of the well deformed ^{153, 155}Sm nuclei and the scissors resonance

NUCLEAR REACTIONS ¹⁵²Sm(d, pγ)¹⁵³Sm, E=13.5 MeV; ¹⁵⁴Sm(d, pγ)¹⁵⁵Sm, E=13 MeV; measured Eγ, Iγ, charged particles, (particle)γ-coin using SiRi particle telescope and CACTUS scintillator arrays at the University of Oslo Cyclotron Laboratory; deduced γ strength functions (γSF) and nuclear level densities (NLD) using the Oslo method and normalized using rigid moment of inertia (RMI) and Hartree-Fock-Bogoliubov plus combinatorial (HFB+comb) models, and extrapolated with the constant temperature (CT) and Fermi gas models, pronounced M1 scissors resonances (SR). Comparison with quasi-particle random phase approximation (QRPA) calculations, with D1M Gogny interaction, and with results of previous experimental results using (d, pγ) and other reactions.

doi: 10.1103/PhysRevC.103.014309
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2021MA65      Phys.Rev.Lett. 127, 182501 (2021)

M.Markova, P.von Neumann-Cosel, A.C.Larsen, S.Bassauer, A.Gorgen, M.Guttormsen, F.L.Bello Garrote, H.C.Berg, M.M.Bjoroen, T.Dahl-Jacobsen, T.K.Eriksen, D.Gjestvang, J.Isaak, M.Mbabane, W.Paulsen, L.G.Pedersen, N.I.J.Pettersen, A.Richter, E.Sahin, P.Scholz, S.Siem, G.M.Tveten, V.M.Valsdottir, M.Wiedeking, F.Zeiser

Comprehensive Test of the Brink-Axel Hypothesis in the Energy Region of the Pygmy Dipole Resonance

NUCLEAR REACTIONS ¹¹⁷Sn(³He, α), E=38 MeV; ^120,124Sn(p, p'), E=16 MeV; measured reaction products, Eα, Iα, Ep, Ip, Eγ, Iγ; deduced γ-ray strength functions (GSFs). Oslo method.

doi: 10.1103/PhysRevLett.127.182501
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2021RO11      Phys.Rev. C 103, 034326 (2021)

D.G.Roux, W.C.Ma, G.B.Hagemann, D.R.Elema, P.Fallon, A.Gorgen, B.Herskind, H.Hubel, J.C.Marsh, G.Sletten, D.Ward, J.N.Wilson

High-spin states and signature inversion in odd-odd ¹⁶⁸Lu

NUCLEAR REACTIONS ¹²³Sb(⁴⁸Ca, 3n), E=203 MeV; measured Eγ, Iγ, multi-fold γγ-coin, γγ(θ)(DCO) using Gammasphere array at LBNL. ¹⁶⁸Lu; deduced high-spin levels, J, p, multipolarities, B(M1)/B(E2), rotational bands, alignments, band crossing frequencies, band configurations, signature splittings and inversions; calculated quasiparticle Routhians. Comparison with cranked shell model calculations using ULTIMATE CRANKER code.

doi: 10.1103/PhysRevC.103.034326
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2021WI06      Phys.Rev. C 104, 014311 (2021)

M.Wiedeking, M.Guttormsen, A.C.Larsen, F.Zeiser, A.Gorgen, S.N.Liddick, D.Mucher, S.Siem, A.Spyrou

Independent normalization for γ-ray strength functions: The shape method

NUCLEAR REACTIONS ⁵⁶Fe(p, p'γ), E^*=11 MeV; ⁹²Zr(p, p'γ), E^*=9 MeV; ¹⁶⁴Dy(³He, ³He'γ), E^*=8 MeV; analyzed experimental data to extract gamma-strength functions (γSF) and nuclear level densities (NLD) using a novel and mostly model independent 'Shape method' in the absence of neutron resonance spacing (D₀) data. Results compared with the Oslo method.

doi: 10.1103/PhysRevC.104.014311
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2020AV04      Phys.Lett. B 811, 135951 (2020)

R.Avigo, O.Wieland, A.Bracco, F.Camera, F.Ameil, T.Arici, A.Atac, D.Barrientos, D.Bazzacco, P.Bednarczyk, G.Benzoni, B.Birkenbach, N.Blasi, H.C.Boston, S.Bottoni, S.Brambilla, B.Bruyneel, M.Ciemala, E.Clement, M.L.Cortes, F.C.L.Crespi, D.M.Cullen, D.Curien, F.Didierjean, C.Domingo-Pardo, G.Duchene, J.Eberth, A.Gorgen, A.Gadea, J.Gerl, N.Goel, P.Golubev, V.Gonzalez, M.Gorska, A.Gottardo, E.Gregor, G.Guastalla, T.Habermann, L.J.Harkness-Brennan, A.Jungclaus, M.Kmiecik, I.Kojouharov, W.Korten, N.Kurz, M.Labiche, N.Lalovic, S.Leoni, M.Lettmann, A.Maj, R.Menegazzo, D.Mengoni, E.Merchan, B.Million, A.I.Morales, D.R.Napoli, C.Nociforo, J.Nyberg, N.Pietralla, S.Pietri, Zs.Podolyak, V.Yu.Ponomarev, A.Pullia, B.Quintana, G.Rainovski, D.Ralet, F.Recchia, M.Reese, P.Regan, P.Reiter, S.Riboldi, D.Rudolph, M.D.Salsac, E.Sanchis, L.G.Sarmiento, H.Schaffner, J.Simpson, O.Stezowski, J.J.Valiente-Dobon, H.J.Wollersheim

Low-lying electric dipole γ-continuum for the unstable ^{62, 64}Fe nuclei: Strength evolution with neutron number

NUCLEAR REACTIONS ¹⁹⁷Au(⁶²Fe, ⁶²Fe'), (⁶⁴Fe, ⁶⁴Fe'), E=400-440 MeV/nucleon; measured reaction products, Eγ, Iγ. ^62,64Fe; deduced γ-ray energies, B(E1). Comparison with the quasi-particle phonon model (QPM) calculations. FRS spectrometer, AGATA.

doi: 10.1016/j.physletb.2020.135951
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2020BE24      Phys.Rev. C 102, 034314 (2020)

F.L.Bello Garrote, E.Sahin, Y.Tsunoda, T.Otsuka, A.Gorgen, M.Niikura, S.Nishimura, G.de Angelis, G.Benzoni, A.I.Morales, V.Modamio, Z.Y.Xu, H.Baba, F.Browne, A.M.Bruce, S.Ceruti, F.C.L.Crespi, R.Daido, M.-C.Delattre, P.Doornenbal, Zs.Dombradi, Y.Fang, S.Franchoo, G.Gey, A.Gottardo, K.Hadynska-Klek, T.Isobe, P.R.John, H.S.Jung, I.Kojouharov, T.Kubo, N.Kurz, I.Kuti, Z.Li, G.Lorusso, I.Matea, K.Matsui, D.Mengoni, T.Miyazaki, S.Momiyama, P.Morfouace, D.R.Napoli, F.Naqvi, H.Nishibata, A.Odahara, R.Orlandi, Z.Patel, S.Rice, H.Sakurai, H.Schaffner, L.Sinclair, P.-A.Soderstrom, D.Sohler, I.G.Stefan, T.Sumikama, D.Suzuki, R.Taniuchi, J.Taprogge, Zs.Vajta, J.J.Valiente-Dobon, H.Watanabe, V.Werner, J.Wu, A.Yagi, M.Yalcinkaya, R.Yokoyama, K.Yoshinaga

β-decay of ⁷⁵Ni and the systematics of the low-lying level structure of neutron-rich odd-A Cu isotopes

RADIOACTIVITY ⁷⁵Ni(β^-), (β^-n)[from ⁹Be(²³⁸U, F), E=345 MeV/nucleon, followed by mass separation and identification of fragments of interest using the BigRIPS separator and ZeroDegree spectrometer, and implanted in WAS3ABi stopper at RIBF-RIKEN facility]; measured Eβ, Eγ, Iγ, γγ-coin, (implants)β-correlations, (implants)βγ-coin using the EURICA array for γ detection, half-life and %β^-n or Pn for the decay of ⁷⁵Ni. ⁷⁵Cu; deduced levels, J, π, Iβ, logft values. Comparison with Monte Carlo shell model (MCSM) calculations. ⁷⁴Cu, ^75,76,77,78Zn, ^76,80,81Ga, ^80,81Ge(β^-); observed γ rays in spectral Fig. 1.

NUCLEAR STRUCTURE ⁷⁵Cu; calculated levels, J, π. ^75,77Cu; calculated occupation numbers of proton and neutron orbits, potential energy surfaces for different spin states. ^{69,71,73,75,77,79}Cu; systematics of energies of the first 1/2- states and corresponding B(E2) values, energies and decay sequences of particle-core coupling states, intruder states. Monte Carlo shell model calculations were performed using the A3DA interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.034314
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2020IN01      Eur.Phys.J. A 56, 68 (2020)

V.W.Ingeberg, S.Siem, M.Wiedeking, K.Sieja, D.L.Bleuel, C.P.Brits, T.D.Bucher, T.S.Dinoko, J.L.Easton, A.Gorgen, M.Guttormsen, P.Jones, B.V.Kheswa, N.A.Khumalo, A.C.Larsen, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, K.L.Malatji, L.Makhathini, B.Maqabuka, D.Negi, S.P.Noncolela, P.Papka, E.Sahin, R.Schwengner, G.M.Tveten, F.Zeiser, B.R.Zikhali

First application of the Oslo method in inverse kinematics

doi: 10.1140/epja/s10050-020-00070-7
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2020KI17      Phys.Rev.Lett. 125, 182701 (2020)

T.Kibedi, B.Alshahrani, A.E.Stuchbery, A.C.Larsen, A.Gorgen, S.Siem, M.Guttormsen, F.Giacoppo, A.I.Morales, E.Sahin, G.M.Tveten, F.L.Bello Garrote, L.Crespo Campo, T.K.Eriksen, M.Klintefjord, S.Maharramova, H.-T.Nyhus, T.G.Tornyi, T.Renstrom, W.Paulsen

Radiative Width of the Hoyle State from γ-Ray Spectroscopy

NUCLEAR REACTIONS ¹²C(p, p'), E=10.7 MeV; measured reaction products, Eγ, Iγ, γ-γ-p coin.; deduced γ-ray energies, resonances, radiative branching ratio, radiative widths. Comparison with available data.

doi: 10.1103/PhysRevLett.125.182701
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2020PE08      Phys.Rev.Lett. 125, 122502 (2020)

R.Perez Sanchez, B.Jurado, V.Meot, O.Roig, M.Dupuis, O.Bouland, D.Denis-Petit, P.Marini, L.Mathieu, I.Tsekhanovich, M.Aiche, L.Audouin, C.Cannes, S.Czajkowski, S.Delpech, A.Gorgen, M.Guttormsen, A.Henriques, G.Kessedjian, K.Nishio, D.Ramos, S.Siem, F.Zeiser

Simultaneous Determination of Neutron-Induced Fission and Radiative Capture Cross Sections from Decay Probabilities Obtained with a Surrogate Reaction

NUCLEAR REACTIONS ²⁴⁰Pu(α, α'), (α, F), E=30 MeV; ²³⁹Pu(n, F), (n, γ), E<2 MeV; measured reaction products, Eγ, Iγ, Eα, Iα, α-fission fragment-γ ray triple coin.; deduced ²³⁹Pu σ as a function of energy. Comparison with ENDF/B-VIII.0, JENDL 4.0. JEFF 3.3 libraries.

doi: 10.1103/PhysRevLett.125.122502
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2019BR10      Phys.Rev. C 99, 054330 (2019)

C.P.Brits, K.L.Malatji, M.Wiedeking, B.V.Kheswa, S.Goriely, F.L.Bello Garrote, D.L.Bleuel, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, T.W.Hagen, S.Hilaire, V.W.Ingeberg, H.Jia, M.Klintefjord, A.C.Larsen, S.N.T.Majola, P.Papka, S.Peru, B.Qi, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser

Nuclear level densities and γ-ray strength functions of ^{180, 181, 182}Ta

NUCLEAR REACTIONS ¹⁸¹Ta(d, p), E=12.5 MeV; ¹⁸¹Ta(d, d'), (d, t), E=12.5, 15 MeV; ¹⁸¹Ta(³He, ³He'), (³He, α), E=34 MeV; measured Ep, Ip, Ed, Id, E(t), I(t), E(³He), I(³He), Eα, Iα, Eγ, Iγ, and (particle)γ-coin using the SiRi particle telescope for charged particles and CACTUS scintillator for γ detection at the Oslo Cyclotron Laboratory. ^180,181,182Ta; deduced γ strength functions (γSF), nuclear level densities (NLDs) by OSLO method, energy and γ deformation of scissors resonance (SR). Back-shifted Fermi-gas, constant temperature plus Fermi gas, and Hartree-Fock-Bogoliubov plus combinatorial models used for absolute normalization of experimental NLDs at the neutron separation energies. ¹⁸¹Ta(n, γ), E=0.004-1 MeV; deduced σ(E). Comparison with theoretical model calculations, and with previous experimental results. ^181,182Ta; calculated potential energy surfaces in (ϵ₂, γ) plane for the ground states using the cranking Nilsson model plus shell correction method.

doi: 10.1103/PhysRevC.99.054330
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2019KA04      Phys.Rev. C 99, 014301 (2019)

L.Kaya, A.Vogt, P.Reiter, C.Muller-Gatermann, A.Gargano, L.Coraggio, N.Itaco, A.Blazhev, K.Arnswald, D.Bazzacco, B.Birkenbach, A.Bracco, B.Bruyneel, L.Corradi, F.C.L.Crespi, G.de Angelis, M.Droste, J.Eberth, E.Farnea, E.Fioretto, C.Fransen, A.Gadea, A.Giaz, A.Gorgen, A.Gottardo, K.Hadynska-Klek, H.Hess, R.Hetzenegger, R.Hirsch, P.R.John, J.Jolie, A.Jungclaus, W.Korten, S.Leoni, L.Lewandowski, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, D.Napoli, Zs.Podolyak, G.Pollarolo, F.Recchia, D.Rosiak, N.Saed-Samii, E.Sahin, M.Siciliano, F.Scarlassara, M.Seidlitz, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, B.Szpak, C.Ur, J.J.Valiente-Dobon, M.Weinert, K.Wolf, K.O.Zell

Identification of high-spin proton configurations in ¹³⁶Ba and ¹³⁷Ba

NUCLEAR REACTIONS ²³⁸U(¹³⁶Xe, ¹³⁶Ba), E=6.84 MeV/nucleon; measured Eγ, Iγ, charged particles, and (charged particles)γ- and γγ-coin using the AGATA array for γ detection and the PRISMA spectrometer for charged particles at PIAVE+ALPI accelerator complex of INFN-LNL-Legnaro. ¹³⁰Te(⁹Be, X)¹³⁶Ba, E=40, 43 MeV; ¹³⁰Te(¹¹B, X)¹³⁶Ba/¹³⁷Ba, E not given; measured Eγ, Iγ, γγ-coin, γγ(θ) using 11 HPGe detectors and HORUS array of 14 HPGe detectors at the FN Tandem accelerator of University of Cologne. ^136,137Ba; deduced high-spin levels, J, π, multipolarities, mixing ratios. Comparison with shell model predictions using GCN50:82, PQM130, realistic SM and SN100PN interactions. Systematics of high-spin levels in ^134,135Xe, ^136,137Ba, ^138,139Ce, ¹⁴⁰Nd.

NUCLEAR STRUCTURE ^136,137Ba; calculated levels, J, π, wave functions, neutron occupation numbers using shell model with several interactions. Comparison with experimental data. ¹³⁴Xe, ¹³⁶Ba, ¹³⁸Ce; calculated average neutron occupation numbers of the gdsh model space for observed high-spin states using the GCN50:82 and SN100PN interactions. ¹³⁴Xe, ¹³⁶Ba; calculated decomposition of the total angular momentum of selected states.

doi: 10.1103/PhysRevC.99.014301
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2019KA36      Phys.Rev. C 100, 024323 (2019)

L.Kaya, A.Vogt, P.Reiter, M.Siciliano, N.Shimizu, Y.Utsuno, H.-K.Wang, A.Gargano, L.Coraggio, N.Itaco, K.Arnswald, D.Bazzacco, B.Birkenbach, A.Blazhev, A.Bracco, B.Bruyneel, L.Corradi, F.C.L.Crespi, G.de Angelis, M.Droste, J.Eberth, A.Esmaylzadeh, E.Farnea, E.Fioretto, C.Fransen, A.Gadea, A.Giaz, A.Gorgen, A.Gottardo, K.Hadynska-Klek, H.Hess, R.Hirsch, P.R.John, J.Jolie, A.Jungclaus, V.Karayonchev, L.Kornwebel, W.Korten, S.Leoni, L.Lewandowski, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, Zs.Podolyak, G.Pollarolo, F.Recchia, J.-M.Regis, N.Saed-Samii, E.Sahin, F.Scarlassara, K.Schomacker, M.Seidlitz, B.Siebeck, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, B.Szpak, E.Teruya, C.Ur, J.J.Valiente-Dobon, K.Wolf, K.Yanase, N.Yoshinaga, K.O.Zell

Isomer spectroscopy in ¹³³Ba and high-spin structure of ¹³⁴Ba

NUCLEAR REACTIONS ¹²⁴Sn(¹³C, X)¹³³Ba/¹³⁴Ba, E=55 MeV from FN tandem accelerator at Cologne; ²⁰⁸Pb(¹³⁶Xe, X)¹³⁴Ba, E=6.84 MeV/nucleon from PIAVE+ALPI accelerator complex at LNL-Legnaro; measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives of isomers by γγ(t) using eight HPGe and 12 LaBr₃(ce) detectors at Cologne, and magnetic spectrometer PRISMA with AGATA array at Legnaro. ^133,134Ba; deduced high-spin levels, isomers, J, π, multipolarities, alignments, bands, backbending, configurations, B(E1), B(E2). Comparison with shell-model calculations for ¹³⁴Ba, and with previous experimental results. Systematics of positive- and negative-parity yrast states in N=78 nuclei: ¹³⁰Te, ¹³²Xe, ¹³⁴Ba, ¹³⁶Ce, ¹³⁸Nd, ¹⁴⁰Sm, ¹⁴²Gd, and Z=56 nuclei: ^{126,128,130,132,134,136,138}Ba.

NUCLEAR STRUCTURE ¹³⁴Ba; calculated levels, J, π using GCN50:82, SN100PN, SNV, PQM130, and realistic SM interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.024323
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2019KU11      Phys.Rev. C 99, 065806 (2019)

I.K.B.Kullmann, A.C.Larsen, T.Renstrom, K.S.Beckmann, F.L.Bello Garrote, L.Crespo Campo, A.Gorgen, M.Guttormsen, J.E.Midtbo, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser

First experimental constraint on the ¹⁹¹Os(n, γ) reaction rate relevant to s-process nucleosynthesis

NUCLEAR REACTIONS ¹⁹²Os(α, α'), E=30 MeV; measured Eα, Iα, Eγ, Iγ, and αγ-coin using the CACTUS array for γ detection and the SiRi array for charged particle detection at the Oslo Cyclotron Laboratory. ¹⁹²Os; deduced nuclear level density and γ-ray strength function. ¹⁹¹Os(n, γ), E=0-100 keV; calculated Maxwellian-averaged σ(E) using TALYS code, and compared with KADoNiS database and evaluated libraries such as TENDL-2017, ENDF/B-VII.0, and JEFF. Systematics of γ-strength functions, nuclear level densities and average radiative widths for ^{187,188,189,190,192,193}Os, ^{181,183,184,185,187}W, ^186,188Re, ^192,193,194Ir.

doi: 10.1103/PhysRevC.99.065806
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2019LI35      Phys.Rev. C 100, 024624 (2019)

S.N.Liddick, A.C.Larsen, M.Guttormsen, A.Spyrou, B.P.Crider, F.Naqvi, J.E.Midtbo, F.L.Bello Garrote, D.L.Bleuel, L.Crespo Campo, A.Couture, A.C.Dombos, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, R.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking, F.Zeiser

Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method

RADIOACTIVITY ⁵¹Sc(β^-)[from ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin; deduced level density, γ-strength function. Measurement was performed at NSCL using the Summing NaI(Tl) detector SuN, used as a TAS.

NUCLEAR REACTIONS ⁵⁰Ti(d, p)⁵¹Ti, E=12.5 MeV; measured Ep, Ip, Eγ, Iγ, γp-coin; deduced nuclear level density (NLD), γ strength function (γSF). Measurement was performed at the Oslo Cyclotron Laboratory, Sweden using the CACTUS NaI scintillator array.

doi: 10.1103/PhysRevC.100.024624
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2019MA20      Phys.Lett. B 791, 403 (2019)

K.L.Malatji, M.Wiedeking, S.Goriely, C.P.Brits, B.V.Kheswa, F.L.Bello Garrote, D.L.Bleuel, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, M.Klintefjord, A.C.Larsen, P.Papka, T.Renstrom, E.Sahin, S.Siem, L.Siess, G.M.Tveten, F.Zeiser

Re-estimation of ¹⁸⁰Ta nucleosynthesis in light of newly constrained reaction rates

NUCLEAR REACTIONS ^180,181,182Ta(n, γ), E ∼ 30 keV; analyzed available data on the nuclear level densities and γ-ray strength functions below the neutron thresholds; calculated σ, reaction rates; deduced s- and p-process nucleosynthesis results.

doi: 10.1016/j.physletb.2019.03.013
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2019ZE03      Phys.Rev. C 100, 024305 (2019)

F.Zeiser, G.M.Tveten, G.Potel, A.C.Larsen, M.Guttormsen, T.A.Laplace, S.Siem, D.L.Bleuel, B.L.Goldblum, L.A.Bernstein, F.L.Bello Garrote, L.Crespo Campo, T.K.Eriksen, A.Gorgen, K.Hadynska-Klek, V.W.Ingeberg, J.E.Midtbo, E.Sahin, T.Tornyi, A.Voinov, M.Wiedeking, J.Wilson

Restricted spin-range correction in the Oslo method: The example of nuclear level density and γ-ray strength function from ²³⁹Pu (d, pγ)²⁴⁰Pu

NUCLEAR REACTIONS ²³⁹Pu(d, p)²⁴⁰Pu, E=12 MeV; measured Eγ, Iγ, Ep, Ip, γp-coin using SiRi particle telescopes and CACTUS γ-ray detector array at the Oslo Cyclotron Laboratory; deduced nuclear level density, γ-ray strength function using Oslo method. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.100.024305
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2018BE10      Phys.Rev. C 97, 064310 (2018)

F.L.Bello Garrote, A.Gorgen, C.Mihai, T.Abraham, L.Crespo Campo, J.-P.Delaroche, D.Filipescu, N.M.Florea, I.Gheorghe, D.G.Ghita, M.Girod, T.Glodariu, K.Hadynska-Klek, M.Klintefjord, J.Libert, R.Lica, T.Marchlewski, N.Marginean, R.Marginean, I.Mitu, A.Negret, C.R.Nita, F.Nowacki, A.Olacel, S.Pascu, T.Renstrom, E.Sahin, S.Siem, J.Srebrny, A.Stolarz, L.Stroe, S.Toma, T.G.Tornyi, A.Tucholski

Lifetime measurements in ¹³⁸Nd

NUCLEAR REACTIONS ¹²³Sb(¹⁹F, 4n), E=68 MeV; measured Eγ, Iγ, γγ-coin, half-lives of excited levels by recoil-distance Doppler shift technique using the ROSPHERE array at IFIN-HH, Bucharest. ¹³⁸Nd; deduced levels, J, π, B(E1), B(E2), configurations; calculated Potential energy surface (PES) for the ground-state. Comparison with large-scale shell model, and constrained Hartree-Fock-Bogoliubov calculations with the Gogny D1S interaction. Discussed onset of collectivity in Nd isotopes below the N=82 shell closure from B(E2) systematics in ^{132,134,136,138,140}Nd, ¹³⁶Ce, ^140,142Sm.

doi: 10.1103/PhysRevC.97.064310
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2018CR05      Phys.Rev. C 98, 054303 (2018)

L.Crespo Campo, M.Guttormsen, F.L.Bello Garrote, T.K.Eriksen, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, M.Klintefjord, A.C.Larsen, T.Renstrom, E.Sahin, S.Siem, A.Springer, T.G.Tornyi, G.M.Tveten

Test of the generalized Brink-Axel hypothesis in ^{64, 65}Ni

NUCLEAR REACTIONS ⁶⁴Ni(p, p'γ), E=16 MeV; ⁶⁴Ni(d, p), E=12.5 MeV; analyzed experimental data for pγ-coin, and dγ-coin data, reported in authors' previous publications 2016Cr04 and 2017Cr04; also analyzed the role of Porter-Thomas fluctuations as a function of excitation and γ-ray energies. ^64,65Ni; deduced γ strength functions (γSF) for various initial excitation energies, and role of fluctuations in the γ strength functions. Discussed validity of generalized Brink-Axel (gBA) hypothesis.

doi: 10.1103/PhysRevC.98.054303
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2018HA16      Eur.Phys.J. A 54, 50 (2018)

T.W.Hagen, A.Gorgen, W.Korten, L.Grente, M.-D.Salsac, F.Farget, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon

Lifetimes of excited states in triaxially deformed ¹⁰⁷Tc and ^{109, 111, 113}Rh

NUCLEAR REACTIONS ⁹B(²³⁸U, F), E=6.2 MeV/nucleon; measured reaction products. ¹⁰⁷Tc, ^109,111,113Rh; measured prompt Eγ, Iγ, γγ-coin using EXOGAM Ge detector array, (ion)γ-coin; deduced T_1/2, positive-parity yrast bands using Recoil-Distance Doppler Shift (RDDS) method; calculated yrast bands states T_1/2 using triaxial particle-rotor method; deduced configuration for the strongest positive-parity band in ¹⁰⁷Tc, indicated gradual increase of triaxial deformation with atomic number Z, reaching almost maximum triaxiality for neutron-rich Rh nuclei. T_1/2 compared to data.

doi: 10.1140/epja/i2018-12482-9
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2018JO01      Phys.Rev. C 97, 024327 (2018)

M.D.Jones, A.O.Macchiavelli, M.Wiedeking, L.A.Bernstein, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, M.Salathe, A.Wiens, A.D.Ayangeakaa, D.L.Bleuel, S.Bottoni, M.P.Carpenter, H.M.Davids, J.Elson, A.Gorgen, M.Guttormsen, R.V.F.Janssens, J.E.Kinnison, L.Kirsch, A.C.Larsen, T.Lauritsen, W.Reviol, D.G.Sarantites, S.Siem, A.V.Voinov, S.Zhu

Examination of the low-energy enhancement of the γ-ray strength function of ⁵⁶Fe

NUCLEAR REACTIONS ⁵⁶Fe(p, p'), E=16 MeV; measured Eγ, Iγ, γ(θ) for discrete and continuum γ rays, γ(linear polarization) for primary γ rays, pγγ-coin using GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array) for γ detection and Washington University Phoswich Wall for protons; deduced multipolarity of continuum γ rays, γ-ray strength function (γSF) with the model-independent ratio method, low-energy enhancement, identical shapes for γSFs constructed with 2+ and 4+ final states consistent with Brink hypothesis. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.97.024327
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2018KA27      Phys.Rev. C 98, 014309 (2018)

L.Kaya, A.Vogt, P.Reiter, M.Siciliano, B.Birkenbach, A.Blazhev, L.Coraggio, E.Teruya, N.Yoshinaga, K.Higashiyama, K.Arnswald, D.Bazzacco, A.Bracco, B.Bruyneel, L.Corradi, F.C.L.Crespi, G.de Angelis, J.Eberth, E.Farnea, E.Fioretto, C.Fransen, B.Fu, A.Gadea, A.Gargano, A.Giaz, A.Gorgen, A.Gottardo, K.Hadynska-Klek, H.Hess, R.Hetzenegger, R.Hirsch, N.Itaco, P.R.John, J.Jolie, A.Jungclaus, W.Korten, S.Leoni, L.Lewandowski, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, Zs.Podolyak, G.Pollarolo, A.Pullia, M.Queiser, F.Recchia, D.Rosiak, N.Saed-Samii, E.Sahin, F.Scarlassara, D.Schneiders, M.Seidlitz, B.Siebeck, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, C.Ur, J.J.Valiente-Dobon, K.Wolf, K.O.Zell

High-spin structure in the transitional nucleus ¹³¹Xe: Competitive neutron and proton alignment in the vicinity of the N=82 shell closure

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X), E=6.84 MeV/nucleon; ²³⁸U(¹³⁶Xe, X), E=7.35 MeV/nucleon; measured projectile-like reaction fragments using PRISMA magnetic spectrometer, Eγ, Iγ, γγ- and (¹³¹Xe)γ-coin using AGATA demonstrator array for γ detection at LNL-Legnaro. ¹²⁴Sn(¹¹B, 3np), E=54 MeV; measured Eγ, Iγ, γγ and pγ-coin, γγ(θ) using HORUS array at Cologne for γ detection and annular double-sided silicon strip detector (DSSSD) for particles. ¹³¹Xe; deduced levels, J, π, high-spin states. Comparison with shell-model calculations using several different interactions; discussed systematics of high-spin states in Z=54 nuclei of ^{123,125,127,129,131}Xe, and N=77 nuclei of ¹²⁷Sn, ¹²⁹Te¹³¹Xe, ¹³³Ba, ¹³⁵Ce, ¹³⁷Nd, ¹³⁹Sm, ¹⁴¹Gd; compiled experimental total aligned angular momentum versus rotational frequency plots for yrast bands in A=117-132 Xe isotopes.

NUCLEAR STRUCTURE ¹³¹Xe; calculated levels, J, π, contribution of proton and neutron configurations for selected states, proton and neutron occupation numbers in h_11/2 orbital, total aligned angular momenta as function of rotational frequency, and B(E2) using shell-model calculations with PQM130, SN100PN, GCN50:82, realistic SM, and SN100-KTH interactions. ¹²⁹Xe; calculated proton and neutron occupation numbers in h_11/2 orbital, total aligned angular momenta as function rotational frequency using shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.98.014309
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2018KA47      Phys.Rev. C 98, 054312 (2018)

L.Kaya, A.Vogt, P.Reiter, C.Muller-Gatermann, M.Siciliano, L.Coraggio, N.Itaco, A.Gargano, K.Arnswald, D.Bazzacco, B.Birkenbach, A.Blazhev, A.Bracco, B.Bruyneel, L.Corradi, F.C.L.Crespi, G.de Angelis, M.Droste, J.Eberth, E.Farnea, E.Fioretto, C.Fransen, A.Gadea, A.Giaz, A.Gorgen, A.Gottardo, K.Hadynska-Klek, H.Hess, R.Hetzenegger, R.Hirsch, P.R.John, J.Jolie, A.Jungclaus, W.Korten, S.Leoni, L.Lewandowski, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, D.Napoli, Zs.Podolyak, G.Pollarolo, F.Recchia, D.Rosiak, N.Saed-Samii, E.Sahin, F.Scarlassara, M.Seidlitz, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, B.Szpak, C.Ur, J.J.Valiente-Dobon, M.Weinert, K.Wolf, K.O.Zell

Millisecond 23/2⁺ isomers in the N=79 isotones ¹³³Xe and ¹³⁵Ba

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X)¹³⁵Ba/¹³³Xe/¹³²Xe/¹³⁶Ba, E=6.84 MeV/nucleon; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using the Advanced GAmma Tracking Array (AGATA) for γ detection and the PRISMA magnetic spectrometer for particle identification at the PIAVE+ALPI accelerator complex of LNL-Legnaro. ¹³⁰Te(⁹Be, X)¹³²Xe/¹³³Xe/¹³⁵Ba/¹³⁶Ba, E=40 MeV; measured Eγ, Iγ, γγ-coin, off-beam γγ(θ), half-lives of isomers using the HORUS array for γ detection at the FN tandem accelerator of the University of Cologne. ^132,133Xe, ^135,136Ba; deduced high-spin levels, isomers, J, π, total conversion coefficients, multipolarities, mixing ratios, configurations, B(M2), B(E3). ²¹⁴Po; deduced mixing ratio for a transition from γγ(θ) measurement. Comparison with previous experimental data, and with large-scale shell model calculations using the SM, GCN50:82, SN100PN and SN100-KTH interactions. Systematics of levels, J, π, transition probabilities and isomers in N=79 isotones of ¹²⁹Sn, ¹³¹Te, ¹³³Xe, ¹³⁵Ba, ¹³⁷Ce, ¹³⁹Nd, ¹⁴¹Sm, ¹⁴³Gd.

NUCLEAR STRUCTURE ¹³³Xe, ¹³⁵Ba; calculated levels, J, π, configurations using large-scale shell model with SM, GCN50:82, SN100PN and SN100-KTH interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.98.054312
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2018LI20      Phys.Rev. C 97, 044323 (2018)

J.Litzinger, A.Blazhev, A.Dewald, F.Didierjean, G.Duchene, C.Fransen, R.Lozeva, D.Verney, G.de Angelis, D.Bazzacco, B.Birkenbach, S.Bottoni, A.Bracco, T.Braunroth, B.Cederwall, L.Corradi, F.C.L.Crespi, P.Desesquelles, J.Eberth, E.Ellinger, E.Farnea, E.Fioretto, R.Gernhauser, A.Goasduff, A.Gorgen, A.Gottardo, J.Grebosz, M.Hackstein, H.Hess, F.Ibrahim, J.Jolie, A.Jungclaus, K.Kolos, W.Korten, S.Leoni, S.Lunardi, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, B.Million, O.Moller, V.Modamio, G.Montagnoli, D.Montanari, A.I.Morales, D.R.Napoli, M.Niikura, N.Pietralla, G.Pollarolo, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, E.Sahin, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, Ch.Theisen, J.J.Valiente-Dobon, V.Vandone, A.Vogt

Transition probabilities in neutron-rich ^{80, 82}Se and the role of the νg_9/2

NUCLEAR REACTIONS ²³⁸U(⁸²Se, ⁸⁰Se), (⁸²Se, ⁸²Se'), E=577 MeV; measured Eγ, Iγ, ^80,82Se scattered particles, (particle)γ-coin, total-kinetic energy losses (TKEL), level half-lives by recoil distance Doppler-shift (RDDS) method using Cologne plunger device, AGATA Demonstrator array for γ detection, and PRISMA magnetic spectrometer for particle detection at the INFNLN-Legnaro. ^80,82Se; deduced levels, J, π, B(E2), B(M1), B(E1), configurations. Comparison with large-scale shell-model calculations using the effective interactions JUN45 and jj44b. Systematics of energies and B(E1) values for N=44-48, Kr, Se and Ge isotopes.

doi: 10.1103/PhysRevC.97.044323
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2018SI03      Phys.Rev. C 97, 024323 (2018)

A.K.Singh, A.Basu, S.Nag, H.Hubel, J.Domscheit, I.Ragnarsson, A.Al-Khatib, G.B.Hagemann, B.Herskind, D.R.Elema, J.N.Wilson, R.M.Clark, M.Cromaz, P.Fallon, A.Gorgen, I.-Y.Lee, D.Ward, W.C.Ma

Absence of paired crossing in the positive parity bands of ¹²⁴Cs

NUCLEAR REACTIONS ⁶⁴Ni(⁶⁴Ni, 3np), E=265 MeV from the 88-inch cyclotron at Lawrence Berkeley National Laboratory; measured Eγ, Iγ, γγ-coin, γγ(θ) angular distribution ratios using Gammasphere array of 100 Compton-suppressed Ge detectors, enriched target. ¹²⁴Cs; deduced high-spin levels, J, π, multipolarities, rotational bands, chiral partner bands, configurations, alignments, band crossings; calculated potential-energy surfaces, single-neutron routhians. Comparison with configuration-dependent cranked Nilsson-Strutinsky model calculations.

doi: 10.1103/PhysRevC.97.024323
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2018SI26      Phys.Rev.Lett. 121, 192501 (2018)

P.Singh, W.Korten, T.W.Hagen, A.Gorgen, L.Grente, M.-D.Salsac, F.Farget, E.Clement, G.de France, T.Braunroth, B.Bruyneel, I.Celikovic, O.Delaune, A.Dewald, A.Dijon, J.-P.Delaroche, M.Girod, M.Hackstein, B.Jacquot, J.Libert, J.Litzinger, J.Ljungvall, C.Louchart, A.Gottardo, C.Michelagnoli, C.Muller-Gatermann, D.R.Napoli, T.Otsuka, N.Pillet, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, T.Togashi, Y.Tsunoda, Ch.Theisen, J.J.Valiente-Dobon

Evidence for Coexisting Shapes through Lifetime Measurements in ⁹⁸Zr

NUCLEAR REACTIONS ⁹Be(²³⁸U, X)⁹⁸Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced level lifetimes, B(E2) values. Comparison with available data. Recoil-distance Doppler shift method.

doi: 10.1103/PhysRevLett.121.192501
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2018UT03      Phys.Rev. C 98, 054619 (2018)

H.Utsunomiya, T.Renstrom, G.M.Tveten, S.Goriely, S.Katayama, T.Ari-izumi, D.Takenaka, D.Symochko, B.V.Kheswa, V.W.Ingeberg, T.Glodariu, Y.-W.Lui, S.Miyamoto, A.C.Larsen, J.E.Midtbo, A.Gorgen, S.Siem, L.Crespo Campo, M.Guttormsen, S.Hilaire, S.Peru, A.J.Koning

Photoneutron cross sections for Ni isotopes: Toward understanding (n, γ) cross sections relevant to weak s-process nucleosynthesis

NUCLEAR REACTIONS ^58,60,61,64Ni(γ, n), E=8.00-22.02 MeV; measured E(n), I(n), σ(E) using ³He proportional counters for neutrons and LaBr3(Ce) detector for γ-flux at NewSUBARU synchrotron radiation facility; deduced γ-ray strength functions (γSF); compared σ(E) with previous experimental data, and with TALYS predictions. ^58,60,63,64(n, γ), E=0.01-10 MeV; calculated radiative σ(E) and Maxwellian averaged σ (MACS) in terms of the experimentally constrained γ-ray strength functions from the Hartree-Fock-Bogolyubov plus quasiparticle-random-phase approximation (HFB+QRPA) based on the Gogny D1M interaction for E1 and M1 components, supplemented with the M1 upbend. Relevance to the s-process nucleosynthesis, and radioactive nuclei at the s-process branching points.

doi: 10.1103/PhysRevC.98.054619
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2017CR04      Phys.Rev. C 96, 014312 (2017)

L.Crespo Campo, A.C.Larsen, F.L.Bello Garrote, T.K.Eriksen, F.Giacoppo, A.Gorgen, M.Guttormsen, M.Klintefjord, T.Renstrom, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten

Investigating the γ decay of ⁶⁵Ni from particle-γ coincidence data

NUCLEAR REACTIONS ⁶⁴Ni(d, p)⁶⁵Ni, E=12.5 MeV; measured charged particle spectra Eγ, Iγ, (particle)γ-coin using the Silicon Ring (SiRi) array for particle detection, and CACTUS array of 26 collimated NaI(Tl) detectors for γ detection at Oslo Cyclotron Laboratory (OCL). ⁶⁵Ni; deduced levels, resonance-like structure centered at ≈4.6 MeV, nuclear level density (NLD) using the constant temperature (CT) and the backshifted Fermi gas (BSFG) models, and the γ-strength function (γSF). Comparison with previous experimental studies.

doi: 10.1103/PhysRevC.96.014312
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2017GU21      Phys.Rev. C 96, 024313 (2017)

M.Guttormsen, S.Goriely, A.C.Larsen, A.Gorgen, T.W.Hagen, T.Renstrom, S.Siem, N.U.H.Syed, G.Tagliente, H.K.Toft, H.Utsunomiya, A.V.Voinov, K.Wikan

Quasicontinuum γ decay of ^{91, 92}Zr: Benchmarking indirect (n, γ) cross section measurements for the s process

NUCLEAR REACTIONS ⁹²Zr(p, d), E=28 MeV; ⁹²Zr(p, p'), E=17 MeV; measured E(p), I(p), E(d), I(d), Eγ, Iγ, (particle)γ-coin, γ-ray multiplicity measured using SiRi array of silicon telescopes for charged particles and CACTUS array of NaI(Tl) detectors for γ rays at Oslo Cyclotron laboratory (OCL). ^91,92Zr; deduced levels, J, π, nuclear level densities (NLDs), E1 and M1 γ-ray strength functions (γSF), l=0 resonances. ^90,91Zr(n, γ), E=0.001-1 MeV and kT<0.11 MeV; deduced σ(E) and Maxwellian-averaged cross sections using TALYS code on the basis of the experimental NLDs and γSF in the present work, and compared with available experimental data.

doi: 10.1103/PhysRevC.96.024313
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2017HA12      Phys.Rev. C 95, 034302 (2017)

T.W.Hagen, A.Gorgen, W.Korten, L.Grente, M.-D.Salsac, F.Farget, I.Ragnarsson, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon

Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

NUCLEAR REACTIONS ⁹Be(²³⁸U, F)⁹²Y/⁹³Y/⁹⁴Y/⁹⁵Y/⁹⁶Y/⁹⁷Y/⁹⁸Y/⁹⁹Y/¹⁰⁰Y/¹⁰¹Y/¹⁰²Y/¹⁰³Y/⁹⁷Nb/⁹⁸Nb/⁹⁹Nb/¹⁰⁰Nb/¹⁰¹Nb/¹⁰²Nb/¹⁰³Nb/¹⁰⁴Nb/¹⁰⁵Nb/¹⁰⁶Nb/¹⁰⁷Nb/¹⁰⁸Nb, E=6.2 MeV/nucleon; measured energy loss ΔE versus the total energy, mass versus mass-to-charge ratio, mass distributions of fission fragments, Eγ, Iγ, (fission fragment)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using VAMOS++ spectrometer and EXOGAM array at GANIL facility. ^99,101Y, ^{101,103,105,107}Nb; deduced high-spin levels, J, π, rotational bands, configurations, B(M1), B(E2). Comparison with triaxial particle-rotor calculations.

doi: 10.1103/PhysRevC.95.034302
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2017KH08      Phys.Rev. C 95, 045805 (2017)

B.V.Kheswa, M.Wiedeking, J.A.Brown, A.C.Larsen, S.Goriely, M.Guttormsen, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, T.K.Eriksen, F.Giacoppo, A.Gorgen, B.L.Goldblum, T.W.Hagen, P.E.Koehler, M.Klintefjord, K.L.Malatji, J.E.Midtbo, H.T.Nyhus, P.Papka, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi

^{137, 138, 139}La (n, γ) cross sections constrained with statistical decay properties of ^{138, 139, 140}La nuclei

NUCLEAR REACTIONS ¹³⁹La(³He, α), (³He, ³He'), E=38 MeV; ¹³⁹La(d, p), E=13.5 MeV; measured α, ³He and proton spectra, Eγ, Iγ, αγ-, (³He)γ-, and pγ-coin using SiRi array for particles and CACTUS array for γ rays. ^138,139,140La; deduced nuclear level densities (NLDs)and γ-ray strength functions (γSF). Comparison with previous experimental data, and with microscopic calculations using HFB+Comb, Fermi gas (BSFG1+CT) and BSFG2+CT models. ^137,138,139La(n, γ), E=0.001-1 MeV; calculated σ(E) with the TALYS reaction code using the measured NLDs and γSFs as inputs, and compared to available experimental data.

doi: 10.1103/PhysRevC.95.045805
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2017KL01      Phys.Rev. C 95, 024312 (2017)

M.Klintefjord, J.Ljungvall, A.Gorgen, S.M.Lenzi, F.L.Bello Garrote, A.Blazhev, E.Clement, G.de France, J.-P.Delaroche, P.Desesquelles, A.Dewald, D.T.Doherty, C.Fransen, A.Gengelbach, G.Georgiev, M.Girod, A.Goasduff, A.Gottardo, K.Hadynska-Klek, B.Jacquot, T.Konstantinopoulos, A.Korichi, A.Lemasson, J.Libert, A.Lopez-Martens, C.Michelagnoli, A.Navin, J.Nyberg, R.M.Perez-Vidal, S.Roccia, E.Sahin, I.Stefan, A.E.Stuchbery, M.Zielinska, D.Barrientos, B.Birkenbach, A.Boston, L.Charles, M.Ciemala, J.Dudouet, J.Eberth, A.Gadea, V.Gonzalez, L.Harkness-Brennan, H.Hess, A.Jungclaus, W.Korten, R.Menegazzo, D.Mengoni, B.Million, A.Pullia, D.Ralet, F.Recchia, P.Reiter, M.D.Salsac, E.Sanchis, O.Stezowski, Ch.Theisen, J.J.Valiente Dobon

Measurement of lifetimes in ^{62, 64}Fe, ^{61, 63}Co, and ⁵⁹Mn

NUCLEAR REACTIONS ⁶⁴Ni(²³⁸U, X), E=6.5 MeV/nucleon; measured ΔE-E energy spectrum for target-like reaction products, mass-over-charge ratio of the ions from TOF, Eγ, Iγ, (recoil ions)γ-coin, level half-lives using recoil distance Doppler shift (RDDS) method using large-acceptance variable mode spectrometer VAMOS++, and AGATA array, and Orsay universal plunger system (OUPS) at GANIL facility. ^62,64Fe, ^61,63Co, ⁵⁹Mn; deduced levels, J, π, B(E2). Comparison with previous experimental results, with large-scale shell-model calculations, and with beyond-mean-field CHFB+5DCH calculations using Gogny D1S interaction.

doi: 10.1103/PhysRevC.95.024312
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2017LA06      J.Phys.(London) G44, 064005 (2017)

A.C.Larsen, M.Guttormsen, N.Blasi, A.Bracco, F.Camera, L.Crespo Campo, T.K.Eriksen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, S.Leoni, J.E.Midtbo, B.Million, H.T.Nyhus, T.Renstrom, S.J.Rose, I.E.Ruud, S.Siem, T.G.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking, F.Zeiser

Low-energy enhancement and fluctuations of γ-ray strength functions in ^{56, 57}Fe: test of the Brink-Axel hypothesis

NUCLEAR REACTIONS ^56,57Fe(p, pγ), E=16 MeV; measured reaction products, Ep, Ip, Eγ, Iγ; deduced level densities, γ-ray strength functions.

doi: 10.1088/1361-6471/aa644a
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2017LA17      Phys.Rev. C 96, 044328 (2017)

S.Lalkovski, E.A.Stefanova, S.Kisyov, A.Korichi, D.Bazzacco, M.Bergstrom, A.Gorgen, B.Herskind, H.Hubel, A.Jansen, T.L.Khoo, T.Kutsarova, A.Lopez-Martens, A.Minkova, Zs.Podolyak, G.Schonwasser, O.Yordanov

Structure of the neutron mid-shell nuclei ^{111, 113}Ag_{64, 66}

NUCLEAR REACTIONS ¹⁶⁸Er(³⁰Si, X), E=145 MeV; measured Eγ, Iγ, γγ-coin using EUROBALL III array at LNL-Legnaro XTU Tandem accelerator. ^111,113Ag; deduced high-spin levels, J, π, γ-branching ratios, band structures, B(M1), B(E2). Comparison with Interacting Boson-Fermion model (IBFM-1) calculations.

NUCLEAR STRUCTURE ^111,113Ag, ^112,114Cd; calculated levels, J, π, B(E2), B(M1) using Interacting Boson-Fermion model (IBFM-1 for Ag nuclei and IBM-1 for Cd nuclei). Comparison with experimental values.

doi: 10.1103/PhysRevC.96.044328
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2017RO16      Phys.Rev. C 96, 014601 (2017)

S.J.Rose, F.Zeiser, J.N.Wilson, A.Oberstedt, S.Oberstedt, S.Siem, G.M.Tveten, L.A.Bernstein, D.L.Bleuel, J.A.Brown, L.Crespo Campo, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska, A.Hafreager, T.W.Hagen, M.Klintefjord, T.A.Laplace, A.C.Larsen, T.Renstrom, E.Sahin, C.Schmitt, T.G.Tornyi, M.Wiedeking

Energy dependence of the prompt γ-ray emission from the (d, p) -induced fission of ²³⁴U^* and ²⁴⁰Pu^*

NUCLEAR REACTIONS ²³³U(d, pF)²³⁴U*, E=12.5 MeV; ²³⁹Pu(d, pF)²³⁹Pu*, E=12 MeV; measured protons, fission fragments, Eγ, p(one of the fission fragments)γ-coin using CACTUS array for γ detection, SiRi detector array for charged-particles and NIFF detector for fission fragments at Oslo Cyclotron Laboratory (OCL); deduced prompt-fission γ-ray spectral (PFGS) distributions, multiplicity, average γ-ray energy, and total γ-ray energy as function of excitation energy. Comparison with model calculations using the fission model code GEF.

doi: 10.1103/PhysRevC.96.014601
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2017SA32      Phys.Rev.Lett. 118, 242502 (2017)

E.Sahin, F.L.Bello Garrote, Y.Tsunoda, T.Otsuka, G.de Angelis, A.Gorgen, M.Niikura, S.Nishimura, Z.Y.Xu, H.Baba, F.Browne, M.-C.Delattre, P.Doornenbal, S.Franchoo, G.Gey, K.Hadynska-Klek, T.Isobe, P.R.John, H.S.Jung, I.Kojouharov, T.Kubo, N.Kurz, Z.Li, G.Lorusso, I.Matea, K.Matsui, D.Mengoni, P.Morfouace, D.R.Napoli, F.Naqvi, H.Nishibata, A.Odahara, H.Sakurai, H.Schaffner, P.-A.Soderstrom, D.Sohler, I.G.Stefan, T.Sumikama, D.Suzuki, R.Taniuchi, J.Taprogge, Z.Vajta, H.Watanabe, V.Werner, J.Wu, A.Yagi, M.Yalcinkaya, K.Yoshinaga

Shell Evolution towards ⁷⁸Ni : Low-Lying States in ⁷⁷Cu

RADIOACTIVITY ⁷⁷Ni(β^-) [from ⁹Be(²³⁸U, X), E=345 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π. Comparison with large-scale Monte Carlo shell model calculations.

doi: 10.1103/physrevlett.118.242502
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2017VO01      Phys.Rev. C 95, 024316 (2017)

A.Vogt, B.Birkenbach, P.Reiter, A.Blazhev, M.Siciliano, K.Hadynska-Klek, J.J.Valiente-Dobon, C.Wheldon, E.Teruya, N.Yoshinaga, K.Arnswald, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, S.J.Freeman, B.Fu, A.Gadea, K.Geibel, W.Gelletly, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, R.Hirsch, H.Hua, P.R.John, J.Jolie, A.Jungclaus, L.Kaya, W.Korten, I.Y.Lee, S.Leoni, L.Lewandowski, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, C.J.Pearson, L.Pellegri, Zs.Podolyak, G.Pollarolo, A.Pullia, M.Queiser, F.Radeck, F.Recchia, P.H.Regan, D.Rosiak, N.Saed-Samii, E.Sahin, F.Scarlassara, D.Schneiders, M.Seidlitz, B.Siebeck, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, V.Vandone, D.D.Warner, A.Wiens, C.Y.Wu, K.O.Zell

Isomers and high-spin structures in the N=81 isotones ¹³⁵Xe and ¹³⁷Ba

NUCLEAR REACTIONS ²³⁸U(¹³⁶Xe, X), E=1 GeV; ²⁰⁸Pb(¹³⁶Xe, X), E=930 MeV; ¹⁹⁸Pt(¹³⁶Xe, X), E=850 MeV; ¹³⁰Te(¹¹B, 3np)¹³⁷Ba, E=54 MeV; measured reaction products, Eγ, Iγ, (particle)γ-coin, γγ-coin, (TKEL)γ-coin, half-lives of isomers by γγ(t). Four experiments carried out using ¹³⁶Xe beam with ²⁰⁸Pb and ²³⁸U targets using PRISMA magnetic mass spectrometer and AGATA demonstrator array at Legnaro PIAVE+ALPI accelerator, ¹³⁶Xe beam with ¹⁹⁸Pt target using GAMMASPHERE and CHICO particle detector arrays at LBNL-cyclotron facility, and ¹¹B beam with ¹³⁰Te target using HORUS array at Cologne FN Tandem accelerator. ¹³⁵Xe, ¹³⁷Ba; deduced levels, J, π, isomers, configurations, B(E2). Comparison with shell-model calculations. Systematics of levels and isomers in N=81 nuclides ¹³¹Sn, ¹³³Te, ¹³⁵Xe, ¹³⁷Ba, ¹³⁹Ce, ¹⁴¹Nd, ¹⁴³Sm and ¹⁴⁵Gd.

NUCLEAR STRUCTURE ¹³⁵Xe, ¹³⁷Ba; calculated levels, J, π, B(E2) using large-scale shell-model with PQM130 and SN100PN interactions, average proton occupation numbers in each single particle orbit of the gdsh model space. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.024316
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2017VO06      Phys.Rev. C 96, 024321 (2017)

A.Vogt, M.Siciliano, B.Birkenbach, P.Reiter, K.Hadynska-Klek, C.Wheldon, J.J.Valiente-Dobon, E.Teruya, N.Yoshinaga, K.Arnswald, D.Bazzacco, A.Blazhev, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, C.Fransen, S.J.Freeman, B.Fu, A.Gadea, W.Gelletly, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, R.Hetzenegger, R.Hirsch, H.Hua, P.R.John, J.Jolie, A.Jungclaus, V.Karayonchev, L.Kaya, W.Korten, I.Y.Lee, S.Leoni, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, C.Muller-Gatermann, D.Napoli, C.J.Pearson, Zs.Podolyak, G.Pollarolo, A.Pullia, M.Queiser, F.Recchia, P.H.Regan, J.-M.Regis, N.Saed-Samii, E.Sahin, F.Scarlassara, M.Seidlitz, B.Siebeck, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, D.D.Warner, K.Wolf, C.Y.Wu, K.O.Zell

High-spin structures in ¹³²Xe and ¹³³Xe and evidence for isomers along the N=79 isotones

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X)¹³²Xe/¹³³Xe, E=6.84 MeV/nucleon from the PIAVE+ALPI accelerator complex at LNL-Legnaro; ¹⁹⁸Pt(¹³⁶Xe, X)¹³²Xe/¹³³Xe, E=6.25 MeV/nucleon from the LBNL cyclotron facility; ¹³⁰Te(α, nγ), (α, 2nγ), E=19 MeV from Cologne FN Tandem accelerator; measured Eγ, Iγ, γγ-, (particle)γ-coin using Advanced GAmma Tracking Array (AGATA) in a demonstrator configuration, and magnetic spectrometer PRISMA for particle identification, (particle)γ-coin using Gammasphere array and CHICO gas-detector array, γγ(θ) using HORUS array at Cologne. ^132,133Xe; deduced high-spin levels, J, π, half-life of a micro-sec isomer in ¹³³Xe with Jπ=(23/2+), multipolarities, mixing ratios. Comparison with shell-model calculations using PQM130 and SN100PN interactions. Systematics of level energies in N=78 and 79 isotones from Z=50 to 64, and even-A A=120-136 Xe isotopes.

doi: 10.1103/PhysRevC.96.024321
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2016CL01      Phys.Rev.Lett. 116, 022701 (2016)

E.Clement, M.Zielinska, A.Gorgen, W.Korten, S.Peru, J.Libert, H.Goutte, S.Hilaire, B.Bastin, C.Bauer, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, J.Butterworth, P.Delahaye, A.Dijon, D.T.Doherty, A.Ekstrom, C.Fitzpatrick, C.Fransen, G.Georgiev, R.Gernhauser, H.Hess, J.Iwanicki, D.G.Jenkins, A.C.Larsen, J.Ljungvall, R.Lutter, P.Marley, K.Moschner, P.J.Napiorkowski, J.Pakarinen, A.Petts, P.Reiter, T.Renstrom, M.Seidlitz, B.Siebeck, S.Siem, C.Sotty, J.Srebrny, I.Stefanescu, G.M.Tveten, J.Van de Walle, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, A.Wiens, H.De Witte, K.Wrzosek-Lipska

Spectroscopic Quadrupole Moments in ^{96, 98}Sr: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60

NUCLEAR REACTIONS ¹⁰⁹Ag, ¹²⁰Sn(⁹⁶Sr, ⁹⁶Sr'), E=275 MeV;⁶⁰Ni, ²⁰⁸Pb(⁹⁸Sr, ⁹⁸Sr'), E=276 MeV; measured reaction products, Eγ, Iγ. ^96,98Sr; deduced B(E2) and B(M1)values, spectroscopic quadrupole moments. Comparison with beyond-mean-field calculations using the Gogny D1S interaction, least squares fitting code GOSIA.

NUCLEAR STRUCTURE ^96,98Sr; calculated B(E2) values with the Gogny D1S interaction in a five-dimensional collective Hamiltonian (5DCH) formalism.

doi: 10.1103/PhysRevLett.116.022701
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2016CL03      Phys.Rev. C 94, 054326 (2016)

E.Clement, M.Zielinska, S.Peru, H.Goutte, S.Hilaire, A.Gorgen, W.Korten, D.T.Doherty, B.Bastin, C.Bauer, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, J.Butterworth, J.Cederkall, P.Delahaye, A.Dijon, A.Ekstrom, C.Fitzpatrick, C.Fransen, G.Georgiev, R.Gernhauser, H.Hess, J.Iwanicki, D.G.Jenkins, A.C.Larsen, J.Ljungvall, R.Lutter, P.Marley, K.Moschner, P.J.Napiorkowski, J.Pakarinen, A.Petts, P.Reiter, T.Renstrom, M.Seidlitz, B.Siebeck, S.Siem, C.Sotty, J.Srebrny, I.Stefanescu, G.M.Tveten, J.Van de Walle, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, A.Wiens, H.De Witte, K.Wrzosek-Lipska

Low-energy Coulomb excitation of ^{96, 98}Sr beams

NUCLEAR REACTIONS ⁶⁰Ni, ²⁰⁸Pb(⁹⁸Sr, ⁹⁸Sr'), E=276.3 MeV; ¹⁰⁹Ag, ¹²⁰Sn(⁹⁶Sr, ⁹⁶Sr'), E=275.5 MeV; measured Eγ, Iγ, scattered Sr ions and target recoils, (particle)γ-coin, γ(θ), differential Coulomb excitation cross sections using Miniball array for γ detection and Si strip detectors for ions at REX-ISOLDE-CERN facility. ^96,98Sr; deduced levels, E2 and M1 matrix elements, B(E2) and level half-lives, quadrupole moments and deformation parameters, E0 monopole transition strengths using GOSIA2 analysis. Comparison with previous experimental data and five-dimensional collective Hamiltonian and Gogny D1S force, and using complex excited VAMPIR approach. Systematics of level energies, transitional and spectroscopic quadrupole moments in ^94,96Kr, ^96,98Sr, ^98,100Zr, ^100,102Mo. Systematics of energy and B(E2) for first 2+ state, and energies of second 0+ states in ^{90,92,94,96,98,100,102}Sr. ⁶⁰Ni, ²⁰⁸Pb(⁹⁸Rb, ⁹⁸Rb'), E=276 MeV; measured Eγ, Iγ, scattered Rb ions and target recoils, (particle)γ-coin, γ(θ), level half-lives by recoil-distance Doppler shift method. ⁹⁸Rb; deduced levels.

doi: 10.1103/PhysRevC.94.054326
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2016CR04      Phys.Rev. C 94, 044321 (2016)

L.Crespo Campo, F.L.Bello Garrote, T.K.Eriksen, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, M.Klintefjord, A.C.Larsen, T.Renstrom, E.Sahin, S.Siem, A.Springer, T.G.Tornyi, G.M.Tveten

Statistical γ-decay properties of ⁶⁴Ni and deduced (n, γ) cross section of the s-process branch-point nucleus ⁶³Ni

NUCLEAR REACTIONS ⁶⁴Ni(p, p'γ), E=16 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin using SiRi particle-detector system and the CACTUS γ-detection array at Oslo Cyclotron Laboratory; deduced γ-strength function, and nuclear level density by Oslo method. ⁶³Ni(n, γ), E=10 keV to 3 MeV; calculated σ(E) and MACs with TALYS using the level density and γ-strength function in the present work, and comparison with experimental results.

doi: 10.1103/PhysRevC.94.044321
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2016DU18      Phys.Rev. C 94, 024614 (2016)

Q.Ducasse, B.Jurado, M.Aiche, P.Marini, L.Mathieu, A.Gorgen, M.Guttormsen, A.C.Larsen, T.Tornyi, J.N.Wilson, G.Barreau, G.Boutoux, S.Czajkowski, F.Giacoppo, F.Gunsing, T.W.Hagen, M.Lebois, J.Lei, V.Meot, B.Morillon, A.M.Moro, T.Renstrom, O.Roig, S.J.Rose, O.Serot, S.Siem, I.Tsekhanovich, G.M.Tveten, M.Wiedeking

Investigation of the ²³⁸U (d, p) surrogate reaction via the simultaneous measurement of γ-decay and fission probabilities

NUCLEAR REACTIONS ²³⁸U(d, p)²³⁹U*, E=15 MeV; measured particle spectra Eγ, Iγ, (proton)γ- and (proton)(fission events)-coin using ΔE/E silicon telescope SiRi for particles and CACTUS array for γ rays at Oslo Cyclotron Laboratory; corrected data using continuum-discretized coupled channels calculations for elastic breakup, and DWBA for inelastic breakup; deduced excitation energy of ²³⁹U versus detected γ-ray energy, ratio between the γ-coincidence and the singles spectra, average angular momentum, γ-decay and fission probabilities as function of excitation energy and compared with JENDL 4.0, ENDF-B/VII.1 and JEFF 3.2 evaluated libraries, and corresponding neutron-induced data; calculated contributions to the total deuteron breakup process (TB) as a function of the excitation energy of ²³⁹U. Statistical model calculations for decay probabilities and average angular momentum.

doi: 10.1103/PhysRevC.94.024614
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2016GO04      J.Phys.(London) G43, 024002 (2016)

A.Gorgen, W.Korten

Coulomb excitation studies of shape coexistence in atomic nuclei

doi: 10.1088/0954-3899/43/2/024002
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2016GU03      Phys.Rev.Lett. 116, 012502 (2016)

M.Guttormsen, A.C.Larsen, A.Gorgen, T.Renstrom, S.Siem, T.G.Tornyi, G.M.Tveten

Validity of the Generalized Brink-Axel Hypothesis in ²³⁸Np

NUCLEAR REACTIONS ²³⁷Np(d, pγ), E not given; analyzed available data; deduced Eγ, Iγ, γ-ray strengths, the validity of generalized Brink-Axel hypothesis.

doi: 10.1103/PhysRevLett.116.012502
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2016HA04      Acta Phys.Pol. B47, 903 (2016)

T.W.Hagen, L.Grente, A.Gorgen, M.-D.Salsac, W.Korten, F.Farget, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, A.Navin, F.Recchia, M.Rejmund, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon

Lifetime Measurements of Excited States in Neutron-rich Fission Fragments

RADIOACTIVITY ²⁴⁷Cm(SF) [ from ⁹Be(²³⁸U, X)²⁴⁷Cm, E=6.2 MeV/nucleon]; measured decay products, Eγ, Iγ. ⁹⁹Y; deduced energy levels, J, π.

doi: 10.5506/APhysPolB.47.903
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2016HA23      Phys.Rev.Lett. 117, 062501 (2016)

K.Hadynska-Klek, P.J.Napiorkowski, M.Zielinska, J.Srebrny, A.Maj, F.Azaiez, J.J.Valiente Dobon, M.Kicinska-Habior, F.Nowacki, H.Naidja, B.Bounthong, T.R.Rodriguez, G.de Angelis, T.Abraham, G.Anil Kumar, D.Bazzacco, M.Bellato, D.Bortolato, P.Bednarczyk, G.Benzoni, L.Berti, B.Birkenbach, B.Bruyneel, S.Brambilla, F.Camera, J.Chavas, B.Cederwall, L.Charles, M.Ciemala, P.Cocconi, P.Coleman-Smith, A.Colombo, A.Corsi, F.C.L.Crespi, D.M.Cullen, A.Czermak, P.Desesquelles, D.T.Doherty, B.Dulny, J.Eberth, E.Farnea, B.Fornal, S.Franchoo, A.Gadea, A.Giaz, A.Gottardo, X.Grave, J.Grebosz, A.Gorgen, M.Gulmini, T.Habermann, H.Hess, R.Isocrate, J.Iwanicki, G.Jaworski, D.S.Judson, A.Jungclaus, N.Karkour, M.Kmiecik, D.Karpinski, M.Kisielinski, N.Kondratyev, A.Korichi, M.Komorowska, M.Kowalczyk, W.Korten, M.Krzysiek, G.Lehaut, S.Leoni, J.Ljungvall, A.Lopez-Martens, S.Lunardi, G.Maron, K.Mazurek, R.Menegazzo, D.Mengoni, E.Merchan, W.Meczynski, C.Michelagnoli, J.Mierzejewski, B.Million, S.Myalski, D.R.Napoli, R.Nicolini, M.Niikura, A.Obertelli, S.F.Ozmen, M.Palacz, L.Prochniak, A.Pullia, B.Quintana, G.Rampazzo, F.Recchia, N.Redon, P.Reiter, D.Rosso, K.Rusek, E.Sahin, M.-D.Salsac, P.-A.Soderstrom, I.Stefan, O.Stezowski, J.Styczen, Ch.Theisen, N.Toniolo, C.A.Ur, V.Vandone, R.Wadsworth, B.Wasilewska, A.Wiens, J.L.Wood, K.Wrzosek-Lipska, M.Zieblinski

Superdeformed and Triaxial States in ⁴²Ca

NUCLEAR REACTIONS ²⁰⁸Pb, ¹⁹⁷Au(⁴²Ca, ⁴²Ca'), E=170 MeV; measured reaction products, Eγ, Iγ. ⁴²Ca; deduced γ-ray energies, B(E2), superdeformed bands. Comparison with available data.

doi: 10.1103/PhysRevLett.117.062501
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2016KL05      Phys.Rev. C 93, 054303 (2016)

M.Klintefjord, K.Hadynska-Klek, A.Gorgen, C.Bauer, F.L.Bello Garrote, S.Bonig, B.Bounthong, A.Damyanova, J.-P.Delaroche, V.Fedosseev, D.A.Fink, F.Giacoppo, M.Girod, P.Hoff, N.Imai, W.Korten, A.-C.Larsen, J.Libert, R.Lutter, B.A.Marsh, P.L.Molkanov, H.Naidja, P.Napiorkowski, F.Nowacki, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, S.Rothe, M.D.Seliverstov, B.Siebeck, S.Siem, J.Srebrny, T.Stora, P.Thole, T.G.Tornyi, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, H.De Witte, M.Zielinska

Structure of low-lying states in ¹⁴⁰Sm studied by Coulomb excitation

NUCLEAR REACTIONS ⁹⁴Mo(¹⁴⁰Sm, ¹⁴⁰Sm'), (¹⁴⁰Sm, ⁹⁴Mo'), E=2.85 MeV/nucleon, [secondary ¹⁴⁰Sm beam from Ta(p, X), E=1.4 GeV reaction at ISOLDE-CERN using RILIS, REXTRAP and EBIS]; measured scattered ¹⁴⁰Sm and ⁹⁴Mo particles, Eγ, Iγ, (particle)γ-coin, γ-yields using MINIBALL array for γ rays and DSSSD detectors for particle detection, γ spectra with laser on and off, γ-ray angular distributions. ¹⁴⁰Sm; deduced E2 matrix elements, B(E2), spectroscopic quadrupole moment for the first two 2+ and the first 4+ states using coupled channel code GOSIA and normalized to γ-ray yield for first 2+ state in ⁹⁴Mo target, and to known half-life for the first 2+ in ¹⁴⁰Sm. Comparison with theoretical calculations using beyond-mean-field model with Gogny D1S interaction, shell model, interacting boson approximation (IBA), and E(5) symmetry. Calculated potential energy surface in (β, γ) plane for ¹⁴⁰Sm. ⁹⁵Mo; measured Iγ yield for 3/2+ to 5/2+ ground-state transition.

doi: 10.1103/PhysRevC.93.054303
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2016KO13      Acta Phys.Pol. B47, 923 (2016)

M.Komorowska, M.Zielinska, P.Napiorkowski, D.T.Doherty, K.Wrzosek-Lipska, P.A.Butler, L.Prochniak, W.Korten, R.Briselet, H.De Witte, L.P.Gaffney, G.Georgiev, A.Goasduff, A.Gorgen, A.Gottardo, E.T.Gregor, K.Hadynska-Klek, H.Hess, M.Klintefjord, T.Konstantinopoulos, J.Ljungvall, R.Lutter, I.Matea, P.Matuszczak, G.G.O'Neill, W.Piatek, P.Reiter, D.Rosiak, M.Scheck, M.Seidlitz, B.Siebeck, M.Thurauf, N.Warr

Study of Octupole Collectivity in ¹⁴⁶Nd and ¹⁴⁸Sm Using the New Coulomb Excitation Set-up at ALTO

NUCLEAR REACTIONS ¹⁴⁶Nd, ¹⁴⁸Sm(⁵⁸Ni, ⁵⁸Ni'), (³²S, ³²S'), E=182, 104 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, nuclear matrix elements.

doi: 10.5506/APhysPolB.47.923
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2016KR04      Phys.Rev. C 93, 044330 (2016)

M.Krzysiek, M.Kmiecik, A.Maj, P.Bednarczyk, A.Bracco, F.C.L.Crespi, E.G.Lanza, E.Litvinova, N.Paar, R.Avigo, D.Bazzacco, G.Benzoni, B.Birkenbach, N.Blasi, S.Bottoni, S.Brambilla, F.Camera, S.Ceruti, M.Ciemala, G.de Angelis, P.Desesquelles, J.Eberth, E.Farnea, A.Gadea, A.Giaz, A.Gorgen, A.Gottardo, J.Grebosz, H.Hess, R.Isocarte, A.Jungclaus, S.Leoni, J.Ljungvall, S.Lunardi, K.Mazurek, R.Menegazzo, D.Mengoni, C.Michelagnoli, B.Milion, A.I.Morales, D.R.Napoli, R.Nicolini, L.Pellegri, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, M.D.Salsac, B.Siebeck, S.Siem, P.-A.Soderstrom, C.Ur, J.J.Valiente-Dobon, O.Wieland, M.Zieblinski

Pygmy dipole resonance in ¹⁴⁰Ce via inelastic scattering of ¹⁷O

NUCLEAR REACTIONS ¹⁴⁰Ce(¹⁷O, ¹⁷O'), E=340 MeV; measured scattered ¹⁷O particle spectra, Eγ, Iγ, (¹⁷O)γ-coin, σ as function of excitation energy in ¹⁴⁰Ce, γ(θ) using AGATA-demonstrator array for γ rays and E-ΔE detectors for particles at LNL's PIAVE-ALPI accelerator facility. DWBA analysis for the pygmy dipole states using microscopically calculated form factors based on transition densities from RQRPA and optical potentials. ¹⁴⁰Ce; deduced levels, J, π, 1- pygmy (PDR) states, isoscalar energy-weighted sum rule (ISEWSR), PDR strengths, isospin character of the dipole states. Comparison with experimental results from (γ, γ') and (α, α') studies.

doi: 10.1103/PhysRevC.93.044330
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2016LA02      Phys.Rev. C 93, 014323 (2016); Pub.Note Phys.Rev. C 100, 039901 (2019)

T.A.Laplace, F.Zeiser, M.Guttormsen, A.C.Larsen, D.L.Bleuel, L.A.Bernstein, B.L.Goldblum, S.Siem, F.L.Bello Garotte, J.A.Brown, L.C.Campo, T.K.Eriksen, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, R.A.Henderson, M.Klintefjord, M.Lebois, T.Renstrom, S.J.Rose, E.Sahin, T.G.Tornyi, G.M.Tveten, A.Voinov, M.Wiedeking, J.N.Wilson, W.Younes

Statistical properties of ²⁴³Pu, and ²⁴²Pu(n, γ) cross section calculation

NUCLEAR REACTIONS ²⁴²Pu(d, p), E=12 MeV; measured Eγ, particle spectra, (particle)γ-coin using CACTUS γ-spectrometer and SiRi (Silicon Ring) for particle detection at Oslo Cyclotron Laboratory; deduced γ-strength functions (γSF) in the quasicontinuum using the Oslo method, level density, centroid energy, strength and γSF of M1-scissors resonance, sum-rule estimates. ²⁴²Pu(n, γ), E=0.001-5 MeV; calculated σ(n, γ) using TALYS and level density and γSF parameters from the present work. Comparison with published data, and ENDF/B-VII.1, JENDL-4.0 and TENDL2014.

doi: 10.1103/PhysRevC.93.014323
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2016LA11      Phys.Rev. C 93, 045810 (2016)

A.C.Larsen, M.Guttormsen, R.Schwengner, D.L.Bleuel, S.Goriely, S.Harissopulos, F.L.Bello Garrote, Y.Byun, T.K.Eriksen, F.Giacoppo, A.Gorgen, T.W.Hagen, M.Klintefjord, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking

Experimentally constrained (p, γ)⁸⁹Y and (n, γ)⁵⁹Y reaction rates relevant to p-process nucleosynthesis

NUCLEAR REACTIONS ⁸⁹Y(p, p'γ), E=17 MeV; measured E(p), I(p), Eγ, Iγ, γ(θ), pγ-coin using silicon ring (SiRi) array for protons and CACTUS array for γ rays at OSLO cyclotron facility; deduced level density, normalized γ-strength function (γSF) of ⁸⁹Y, enhancement of γSF due to strong, low-energy M1 transitions at high excitation energies. Comparison with shell-model calculations. ⁸⁸Sr(p, γ)⁸⁹Y, E=1.5-5 MeV; ⁸⁸Y(n, γ)⁸⁹Y, E=0.01-1.5 MeV; deduced cross sections and astrophysical reaction rates using present data and TALYS code. Comparison of cross-section data with values from the BRUSLIB library. Relevance to p-process nucleosynthesis.

doi: 10.1103/PhysRevC.93.045810
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2016MO15      Phys.Rev. C 93, 054623 (2016)

D.Montanari, L.Corradi, S.Szilner, G.Pollarolo, A.Goasduff, T.Mijatovic, D.Bazzacco, B.Birkenbach, A.Bracco, L.Charles, S.Courtin, P.Desesquelles, E.Fioretto, A.Gadea, A.Gorgen, A.Gottardo, J.Grebosz, F.Haas, H.Hess, D.Jelavic Malenica, A.Jungclaus, M.Karolak, S.Leoni, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, G.Montagnoli, D.R.Napoli, A.Pullia, F.Recchia, P.Reiter, D.Rosso, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, N.Soic, A.M.Stefanini, O.Stezowski, Ch.Theisen, C.A.Ur, J.J.Valiente-Dobon, M.Varga Pajtler

Pair neutron transfer in ⁶⁰Ni + ¹¹⁶Sn probed via γ-particle coincidences

NUCLEAR REACTIONS ¹¹⁶Sn(⁶⁰Ni, ⁶⁰Ni'), (⁶⁰Ni, n), (⁶⁰Ni, 2n), E=245 MeV; measured particle and gamma spectra, (particle)γ-coin, TKEL spectra for elastic, inelastic, one- and two-neutron pickup channels using PRISMA magnetic spectrometer and AGATA array for γ rays at XTU-Tandem accelerator of LNL-Legnaro; deduced transfer probabilities for the one- and two-neutron pickup channels. Comparison with theoretical calculations. ^60,61,62Ni, ^114,115,116Sn; measured Doppler-corrected γ spectra; deduced levels, and experimental yields.

doi: 10.1103/PhysRevC.93.054623
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2016NE08      Phys.Rev. C 94, 024332 (2016)

D.Negi, M.Wiedeking, E.G.Lanza, E.Litvinova, A.Vitturi, R.A.Bark, L.A.Bernstein, D.L.Bleuel, S.Bvumbi, T.D.Bucher, B.H.Daub, T.S.Dinoko, J.L.Easton, A.Gorgen, M.Guttormsen, P.Jones, B.V.Kheswa, N.A.Khumalo, A.C.Larsen, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, L.P.Masiteng, M.R.Nchodu, J.Ndayishimye, R.T.Newman, S.P.Noncolela, J.N.Orce, P.Papka, L.Pellegri, T.Renstrom, D.G.Roux, R.Schwengner, O.Shirinda, S.Siem

Nature of low-lying electric dipole resonance excitations in ⁷⁴Ge

NUCLEAR REACTIONS ⁷⁴Ge(α, α'), E=48 MeV; measured Eγ, Iγ, Eα, αγ-coin, γ(θ), σ(θ) for scattered α particles, relative cross sections of E1 transitions using AFRODITE array for γ detection and silicon detectors for α particles at iThemba Labs cyclotron facility. ⁷⁴Ge; deduced levels, J, π, B(E1), suppression in relative cross section for the excitation of pygmy-dipole resonances (PDR) as compared to those in (γ, γ') data for excitations above 6 MeV. Comparison of B(E1) with relativistic quasiparticle time blocking approximation (RQTBA) calculations.

doi: 10.1103/PhysRevC.94.024332
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2016RE13      Phys.Rev. C 93, 064302 (2016)

T.Renstrom, H.-T.Nyhus, H.Utsunomiya, R.Schwengner, S.Goriely, A.C.Larsen, D.M.Filipescu, I.Gheorghe, L.A.Bernstein, D.L.Bleuel, T.Glodariu, A.Gorgen, M.Guttormsen, T.W.Hagen, B.V.Kheswa, Y.-W.Lui, D.Negi, I.E.Ruud, T.Shima, S.Siem, K.Takahisa, O.Tesileanu, T.G.Tornyi, G.M.Tveten, M.Wiedeking

Low-energy enhancement in the γ-ray strength functions of ^{73, 74}Ge

NUCLEAR REACTIONS ⁷⁴Ge(³He, ³He), (³He, α), E=38 MeV; measured Eγ, Iγ, (particle)γ-coin using SiRi particle detector array and CACTUS array for γ detection at Oslo Cyclotron Laboratory (OCL) facility. ⁷⁴Ge(γ, n), E=10.4-12.7 MeV; measured E(n), I(n), σ(E) using 4π neutron detection array at NewSUBARU synchrotron radiation facility. ^73,74Ge, deduced γ-strength functions (γSF), nuclear level densities (NLD). Comparison with shell-model calculations. ^72,73Ge(n, γ), E=0.001-3 MeV; deduced experimentally constrained σ(E), and compared with TALYS calculations for E1 and M1 radiations.

doi: 10.1103/PhysRevC.93.064302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetK2612.

2016SA07      Acta Phys.Pol. B47, 889 (2016)

E.Sahin, F.L.Bello Garrote, A.Gorgen, G.de Angelis, M.Niikura, S.Nishimura, D.Mengoni, Z.Xu, H.Baba, F.Browne, P.Doornenbal, S.Franchoo, G.Guillaume, T.Isobe, P.R.John, H.S.Jung, K.K.Hadynska-Klek, Z.Li, G.Lorusso, I.Matea, K.Matsui, P.Morfouace, D.R.Napoli, H.Nishibata, A.Odahara, H.Sakurai, P.-A.Soderstrom, D.Sohler, I.Stefan, T.Sumikama, D.Suzuki, R.Taniuchi, J.Taprogge, Z.Vajta, H.Watanabe, V.Werner, J.Wu, A.Yagi, K.Yoshinaga

First Results on the Excited States in ⁷⁷Cu

RADIOACTIVITY ⁷⁷Ni(β^-) [from ⁹Be(²³⁸U, X), E=345 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities.

doi: 10.5506/APhysPolB.47.889
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2016TV01      Phys.Rev. C 94, 025804 (2016)

G.M.Tveten, A.Spyrou, R.Schwengner, F.Naqvi, A.C.Larsen, T.K.Eriksen, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, L.Crespo Campo, M.Guttormsen, F.Giacoppo, A.Gorgen, T.W.Hagen, K.Hadynska-Klek, M.Klintefjord, B.S.Meyer, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi

Completing the nuclear reaction puzzle of the nucleosynthesis of ⁹²Mo

NUCLEAR REACTIONS ⁹²Mo(p, p'), E=16.5 MeV; measured Ep, Ip, Eγ, Iγ pγ-coin, angular distributions using SiRi silicon ΔE-E telescopes for protons and CACTUS scintillator detector array for γ rays at Oslo Cyclotron Laboratory; deduced nuclear level density (NLD) and γ-strength function (γSF) of ⁹²Mo. ⁹¹Nb(p, γ)⁹²Mo, T₉=1.8-3.5; deduced astrophysical reaction rates using TALYS 1.6 code and NLD and γSF input from present experiment; discussed puzzle of the nucleosynthesis of ⁹²Mo in the context of p process. Comparison with previous experimental results from ⁹²Mo(γ, γ') and ^92,94,95,96Mo(γ, n) reactions, and shell model calculations.

doi: 10.1103/PhysRevC.94.025804
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2016VO04      Phys.Rev. C 93, 054325 (2016)

A.Vogt, B.Birkenbach, P.Reiter, A.Blazhev, M.Siciliano, J.J.Valiente-Dobon, C.Wheldon, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, R.S.Chakrawarthy, R.Chapman, D.Cline, L.Corradi, F.C.L.Crespi, M.Cromaz, G.de Angelis, J.Eberth, P.Fallon, E.Farnea, E.Fioretto, S.J.Freeman, A.Gadea, K.Geibel, W.Gelletly, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, A.B.Hayes, H.Hess, H.Hua, P.R.John, J.Jolie, A.Jungclaus, W.Korten, I.Y.Lee, S.Leoni, X.Liang, S.Lunardi, A.O.Macchiavelli, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, D.Napoli, C.J.Pearson, L.Pellegri, Zs.Podolyak, G.Pollarolo, A.Pullia, F.Radeck, F.Recchia, P.H.Regan, E.Sahin, F.Scarlassara, G.Sletten, J.F.Smith, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, R.Teng, C.Ur, V.Vandone, D.Ward, D.D.Warner, A.Wiens, C.Y.Wu

High-spin structure of ¹³⁴Xe

NUCLEAR REACTIONS ¹⁹⁸Pt(¹³⁶Xe, ¹³⁴Xe), E=850 MeV; ²⁰⁸Pb(¹³⁶Xe, ¹³⁴Xe), E=930 MeV; ²³⁸U(¹³⁶Xe, ¹³⁴Xe), E=1 GeV; measured Eγ, Iγ, γγ-coin, γ(θ), time-of-flight total kinetic energy loss (TKEL) using Gammasphere and Chico arrays at LBNL cyclotron facility for the ¹⁹⁸Pt+¹³⁶Xe reaction, and PRISMA spectrometer, Dante and AGATA arrays at PIAVE+ALPI accelerator complex for the ²⁰⁸Pb+¹³⁶Xe and ²³⁸U+¹³⁶Xe reactions. ¹³⁴Xe; deduced high-spin levels, J, π, multipolarity, configurations. Comparison with shell-model calculations using the jj55 effective interaction.

doi: 10.1103/PhysRevC.93.054325
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2015BE25      Phys.Rev. C 92, 024317 (2015)

F.L.Bello Garrote, A.Gorgen, J.Mierzejewski, C.Mihai, J.P.Delaroche, M.Girod, J.Libert, E.Sahin, J.Srebrny, T.Abraham, T.K.Eriksen, F.Giacoppo, T.W.Hagen, M.Kisielinski, M.Klintefjord, M.Komorowska, M.Kowalczyk, A.C.Larsen, T.Marchlewski, I.O.Mitu, S.Pascu, S.Siem, A.Stolarz, T.G.Tornyi

Lifetime measurement for the 2⁺₁ state in ¹⁴⁰Sm and the onset of collectivity in neutron-deficient Sm isotopes

NUCLEAR REACTIONS ¹²⁴Te(²⁰Ne, 4n), E=82 MeV; measured Eγ, Iγ, γγ-coin, lifetime of the first 2+ state by recoil-distance Doppler shift technique using Koln-Bucharest Plunger device coupled to the EAGLE spectrometer at Heavy Ion Laboratory of the University of Warsaw. ¹⁴⁰Sm; deduced levels, B(E2). Systematics of energies and B(E2) of first 2+ states, and E(4+)/E(2+) in ^{134,136,138,140,142,144,146,148,150,152,154}Sm. ¹⁴¹Sm, ¹⁹⁷Au; observed γ. Fit of B(E2) and E(2+) with modified Grodzins formula. Comparison with calculations based on a mapped collective Hamiltonian in five quadrupole coordinates (5DCH) and the Gogny D1S interaction.

doi: 10.1103/PhysRevC.92.024317
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Data from this article have been entered in the XUNDL database. For more information, click here.

2015BI08      Phys.Rev. C 92, 044319 (2015)

B.Birkenbach, A.Vogt, K.Geibel, F.Recchia, P.Reiter, J.J.Valiente-Dobon, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, L.Corradi, F.C.L.Crespi, G.de Angelis, P.Desesquelles, J.Eberth, E.Farnea, E.Fioretto, A.Gadea, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, J.Grebosz, H.Hess, P.R.John, J.Jolie, D.S.Judson, A.Jungclaus, W.Korten, S.Lenzi, S.Leoni, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, G.Montagnoli, D.Montanari, D.Napoli, L.Pellegri, G.Pollarolo, A.Pullia, B.Quintana, F.Radeck, D.Rosso, E.Sahin, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, S.Szilner, B.Szpak, Ch.Theisen, C.Ur, V.Vandone, A.Wiens

Spectroscopy of the neutron-rich actinide nucleus ²⁴⁰U following multinucleon-transfer reactions

NUCLEAR REACTIONS ²³⁸U(⁷⁰Zn, X), E=460 MeV; ²³⁸U(¹³⁶Xe, X), E=1 GeV; measured Eγ, Iγ, (reaction products)γ-, γγ-coin, TKEL spectrum using PRISMA magnetic spectrometer, DANTE particle-detector array, and CLARA, AGATA γ arrays at INFN-LNL Legnaro facility. ²⁴⁰U; deduced levels, J, π, bands, kinetic moment of inertia, staggering in bands for ^236,238,240U. Comparison of level structure with predictions of cluster model, macroscopic-microscopic approach, and dynamical coupling model. Comparison of moment of inertia with theoretical predictions using CRHB+LN(NL1) and CRHB+LN(NL3*) calculations.

doi: 10.1103/PhysRevC.92.044319
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2015CE03      Phys.Rev. C 91, 044311 (2015)

I.Celikovic, A.Dijon, E.Clement, G.de France, P.Van Isacker, J.Ljungvall, A.Dewald, C.Fransen, G.Georgiev, A.Gorgen, A.Gottardo, M.Hackstein, T.W.Hagen, C.Louchart, P.Napiorkowski, A.Obertelli, F.Recchia, W.Rother, S.Siem, B.Sulignano, P.Ujic, J.J.Valiente-Dobon, M.Zielinska

Probing collectivity in Zn isotopes with one particle or hole outside the N=40 subshell closure

NUCLEAR REACTIONS ⁷⁰Zn(²³⁸U, X)⁶⁹Zn/⁷¹Zn, E=6.76 MeV/nucleon; measured Eγ, Iγ, level-half-lives by recoil distance Doppler-shift method using VAMOS spectrometer, EXOGAM array, and a differential plunger device at GANIL. ^69,71Zn; deduced levels, J, π, B(M1), B(E2). Comparison with shell-model calculations with the JUN45 interaction. Coexistence of single-particle and collective states.

doi: 10.1103/PhysRevC.91.044311
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2015CE05      Phys.Rev.Lett. 115, 222502 (2015)

S.Ceruti, F.Camera, A.Bracco, R.Avigo, G.Benzoni, N.Blasi, G.Bocchi, S.Bottoni, S.Brambilla, F.C.L.Crespi, A.Giaz, S.Leoni, A.Mentana, B.Million, A.I.Morales, R.Nicolini, L.Pellegri, A.Pullia, S.Riboldi, O.Wieland, B.Birkenbach, D.Bazzacco, M.Ciemala, P.Desesquelles, J.Eberth, E.Farnea, A.Gorgen, A.Gottardo, H.Hess, D.S.Judson, A.Jungclaus, M.Kmiecik, W.Korten, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, V.Modamio, D.Montanari, S.Myalski, D.Napoli, B.Quintana, P.Reiter, F.Recchia, D.Rosso, E.Sahin, M.D.Salsac, P.-A.Soderstrom, O.Stezowski, Ch.Theisen, C.Ur, J.J.Valiente-Dobon, M.Zieblinski

Isospin Mixing in ⁸⁰Zr From Finite to Zero Temperature

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, X)⁸⁰Zr, E=136 MeV; ⁴⁴Ca(³⁷Cl, X)⁸¹Rb, E=95 MeV; measured reaction products, Eγ, Iγ; deduced isospin mixing and its temperature dependence, isospin-symmetry-breaking correction for Fermi superallowed transition. Comparison with available data.

doi: 10.1103/PhysRevLett.115.222502
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2015CR02      Phys.Rev. C 91, 024323 (2015)

F.C.L.Crespi, A.Bracco, R.Nicolini, E.G.Lanza, A.Vitturi, D.Mengoni, S.Leoni, G.Benzoni, N.Blasi, C.Boiano, S.Bottoni, S.Brambilla, F.Camera, A.Corsi, A.Giaz, B.Million, L.Pellegri, V.Vandone, O.Wieland, P.Bednarczyk, M.Ciemala, M.Kmiecik, M.Krzysiek, A.Maj, D.Bazzacco, M.Bellato, B.Birkenbach, D.Bortolato, E.Calore, B.Cederwall, G.de Angelis, P.Desesquelles, J.Eberth, E.Farnea, A.Gadea, A.Gorgen, A.Gottardo, H.Hess, R.Isocrate, J.Jolie, A.Jungclaus, R.S.Kempley, M.Labiche, R.Menegazzo, C.Michelagnoli, P.Molini, D.R.Napoli, A.Pullia, B.Quintana, F.Recchia, P.Reiter, E.Sahin, S.Siem, P.-A.Soderstrom, O.Stezowski, Ch.Theisen, C.Ur, J.J.Valiente-Dobon

1^- and 2⁺ discrete states in ⁹⁰Zr populated via the (¹⁷0, ¹⁷0'γ) reaction

NUCLEAR REACTIONS ⁹⁰Zr(¹⁷O, ¹⁷O')(¹⁷O, ¹⁷O), E=340 MeV; measured particle spectra, Eγ, Iγ, σ(θ) for g.s., 1-, 2+ and 3- states, (scattered particle)γ-coin using Si telescopes for particle detection and AGATA array for γ detection at LNL-Legnaro Tandem-ALPI accelerator facility. ⁹⁰Zr; deduced levels, J, π, B(E1), isoscalar component of the 1- state. DWBA analysis of σ(θ) data. Comparison of E1 strength with other experiments.

doi: 10.1103/PhysRevC.91.024323
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0767. Data from this article have been entered in the XUNDL database. For more information, click here.

2015GI02      Phys.Rev. C 91, 054327 (2015)

F.Giacoppo, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, R.B.Firestone, A.Gorgen, M.Guttormsen, T.W.Hagen, M.Klintefjord, P.E.Koehler, A.C.Larsen, H.T.Nyhus, T.Renstrom, E.Sahin, S.Siem, T.Tornyi

γ decay from the quasicontinuum of ^{197, 198}Au

NUCLEAR REACTIONS ¹⁹⁷Au(d, p), E=12.5 MeV; ¹⁹⁷Au(³He, ³He'), E=34.0 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using CACTUS spectrometer for γ rays and SiRi (Silicon Ring) for particle detection at Oslo Cyclotron Laboratory; deduced γ strength functions, level density, spin cutoff distributions as function of excitation energy, σ(E) for ¹⁹⁷Au(n, γ). Comparison with (γ, n) experimental results, and with theoretical calculations using EGLO model with four SLO components, and QRPA.

doi: 10.1103/PhysRevC.91.054327
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2015GU27      Eur.Phys.J. A 51, 170 (2015)

M.Guttormsen, M.Aiche, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, Y.Byun, Q.Ducasse, T.K.Eriksen, F.Giacoppo, A.Gorgen, F.Gunsing, T.W.Hagen, B.Jurado, M.Klintefjord, A.C.Larsen, L.Lebois, B.Leniau, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten, A.Voinov, M.Wiedeking, J.Wilson

Experimental level densities of atomic nuclei

doi: 10.1140/epja/i2015-15170-4
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2015KH02      Phys.Lett. B 744, 268 (2015)

B.V.Kheswa, M.Wiedeking, F.Giacoppo, S.Goriely, M.Guttormsen, A.C.Larsen, F.L.Bello Garrote, T.K.Eriksen, A.Gorgen, T.W.Hagen, P.E.Koehler, M.Klintefjord, H.T.Nyhus, P.Papka, T.Renstrom, S.Rose, E.Sahin, S.Siem, T.Tornyi

Galactic production of ¹³⁸La: Impact of ^{138, 139}La statistical properties

NUCLEAR REACTIONS ¹³⁹La(³He, X)¹³⁸La/¹³⁹La, E=38 MeV; measured reaction products, Eγ, Iγ; deduced σ, γ-ray strength functions, nuclear level densities, Maxwellian-averaged σ. Comparison with available data.

doi: 10.1016/j.physletb.2015.03.065
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2015KL01      Acta Phys.Pol. B46, 607 (2015)

M.Klintefjord, K.Hadynska-Klek, J.Samorajczyk, A.Gorgen, Ch.Droste, J.Srebrny, T.Abraham, C.Bauer, F.L.Bello Garrote, S.Bonig, A.Damyanova, F.Giacoppo, E.Grodner, P.Hoff, M.Kisielinski, M.Komorowska, W.Korten, M.Kowalczyk, J.Kownacki, A.C.Larsen, R.Lutter, T.Marchlewski, P.Napiorkowski, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, B.Siebeck, S.Siem, A.Stolarz, R.Szenborn, P.Thole, T.Tornyi, A.Tucholski, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, N.Warr, H.De Witte, M.Zielinska

Spectroscopy of Low-lying States in ¹⁴⁰Sm

NUCLEAR REACTIONS ⁹⁴Mo(¹⁴⁰Sm, ¹⁴⁰Sm'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. ¹⁴⁰Sm; deduced energy levels, J, π, angular correlation coefficients, B(E2). GOSIA analysis.

doi: 10.5506/APhysPolB.46.607
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2015LA08      Acta Phys.Pol. B46, 509 (2015)

A.C.Larsen, S.Goriely, L.A.Bernstein, D.L.Bleuel, A.Bracco, B.A.Brown, F.Camera, T.K.Eriksen, S.Frauendorf, F.Giacoppo, M.Guttormsen, A.Gorgen, S.Harissopulos, S.Leoni, S.N.Liddick, F.Naqvi, H.T.Nyhus, S.J.Rose, T.Renstrom, R.Schwengner, S.Siem, A.Spyrou, G.M.Tveten, A.V.Voinov, M.Wiedeking

Upbend and M1 Scissors Mode in Neutron-rich Nuclei - Consequences for r-process (n, γ) Reaction Rates

doi: 10.5506/APhysPolB.46.509
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2015LI42      Phys.Rev. C 92, 064322 (2015)

J.Litzinger, A.Blazhev, A.Dewald, F.Didierjean, G.Duchene, C.Fransen, R.Lozeva, K.Sieja, D.Verney, G.de Angelis, D.Bazzacco, B.Birkenbach, S.Bottoni, A.Bracco, T.Braunroth, B.Cederwall, L.Corradi, F.C.L.Crespi, P.Desesquelles, J.Eberth, E.Ellinger, E.Farnea, E.Fioretto, R.Gernhauser, A.Goasduff, A.Gorgen, A.Gottardo, J.Grebosz, M.Hackstein, H.Hess, F.Ibrahim, J.Jolie, A.Jungclaus, K.Kolos, W.Korten, S.Leoni, S.Lunardi, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, B.Million, O.Moller, V.Modamio, G.Montagnoli, D.Montanari, A.I.Morales, D.R.Napoli, M.Niikura, G.Pollarolo, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, E.Sahin, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, Ch.Theisen, J.J.Valiente Dobon, V.Vandone, A.Vogt

Transition probabilities in neutron-rich ^{84, 86}Se

NUCLEAR REACTIONS ²³⁸U(⁸²Se, ⁸⁴Se), (⁸²Se, ⁸⁶Se), E=577 MeV; measured Eγ, Iγ, (⁸⁴Se)γ- and (⁸⁶Se)γ-coin, level half-lives by recoil-distance Doppler shift (RDDS) method using Cologne Plunger device, PRISMA magnetic spectrometer and AGATA demonstrator array at INFN-Legnaro accelerator facility. ^84,86Se; deduced levels, B(E2) for transitions from first 2+, 4+ and 6+ states. Comparison with large-scale shell model calculations using several different effective interactions.

doi: 10.1103/PhysRevC.92.064322
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2015PE08      Phys.Rev. C 92, 014330 (2015)

L.Pellegri, A.Bracco, N.Tsoneva, R.Avigo, G.Benzoni, N.Blasi, S.Bottoni, F.Camera, S.Ceruti, F.C.L.Crespi, A.Giaz, S.Leoni, H.Lenske, B.Million, A.I.Morales, R.Nicolini, O.Wieland, D.Bazzacco, P.Bednarczyk, B.Birkenbach, M.Ciemala, G.de Angelis, E.Farnea, A.Gadea, A.Gorgen, A.Gottardo, J.Grebosz, R.Isocrate, M.Kmiecik, M.Krzysiek, S.Lunardi, A.Maj, K.Mazurek, D.Mengoni, C.Michelagnoli, D.R.Napoli, F.Recchia, B.Siebeck, S.Siem, C.Ur, J.J.Valiente-Dobon

Multitude of 2⁺ discrete states in ¹²⁴Sn observed via the (¹⁷O, ¹⁷O' γ) reaction: Evidence for pygmy quadrupole states

NUCLEAR REACTIONS ¹²⁴Sn(¹⁷O, ¹⁷O'), E=340 MeV; measured Eγ, Iγ, γ(θ), particle spectra, (¹⁷O)γ-coin, inelastic scattering σ using the AGATA array at Tandem-ALPI accelerator complex of INFN-LNL facility. ¹²⁴Sn; deduced levels, J, π, multipolarity, B(E2) for 2+ states, sum rule strength for the ISGQR. DWBA analysis. Comparison with self-consistent density functional theory and extended QRPA approach describing 2+ states as pygmy quadrupole resonances.

doi: 10.1103/PhysRevC.92.014330
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2015RO27      Phys.Rev. C 92, 064313 (2015)

D.G.Roux, W.C.Ma, G.B.Hagemann, H.Amro, D.R.Elema, P.Fallon, A.Gorgen, B.Herskind, H.Hubel, Y.Li, A.O.Macchiavelli, J.C.Marsh, G.Sletten, D.Ward, J.N.Wilson

Toward complete spectroscopy of ¹⁶⁷Lu

NUCLEAR REACTIONS ¹²³Sb(⁴⁸Ca, 4n), E=203 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using Gammasphere array at LBNL cyclotron facility. ¹⁶⁷Lu; deduced high-spin levels, J, π, multipolarity, rotational bands, triaxial strongly-deformed (TSD) bands, alignments, dynamic moments of inertia, band crossings, zero- and one-phonon wobbling, and multiquasiparticle excitations, quasiparticle and Nilsson configurations. Comparison with cranked shell model calculations, and with previous experimental results. Calculated quasiparticle Routhians as function of rotational frequency.

doi: 10.1103/PhysRevC.92.064313
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2015SA09      Phys.Rev. C 91, 034302 (2015)

E.Sahin, M.Doncel, K.Sieja, G.de Angelis, A.Gadea, B.Quintana, A.Gorgen, V.Modamio, D.Mengoni, J.J.Valiente-Dobon, P.R.John, M.Albers, D.Bazzacco, G.Benzoni, B.Birkenbach, B.Cederwall, E.Clement, D.Curien, L.Corradi, P.Desesquelles, A.Dewald, F.Didierjean, G.Duchene, J.Eberth, M.N.Erduran, E.Farnea, E.Fioretto, G.de France, C.Fransen, R.Gernhauser, A.Gottardo, M.Hackstein, T.Hagen, A.Hernandez-Prieto, H.Hess, T.Huyuk, A.Jungclaus, S.Klupp, W.Korten, A.Kusoglu, S.M.Lenzi, J.Ljungvall, C.Louchart, S.Lunardi, R.Menegazzo, C.Michelagnoli, T.Mijatovic, B.Million, P.Molini, G.Montagnoli, D.Montanari, O.Moller, D.R.Napoli, A.Obertelli, R.Orlandi, G.Pollarolo, A.Pullia, F.Recchia, P.Reiter, D.Rosso, W.Rother, M.-D.Salsac, F.Scarlassara, M.Schlarb, S.Siem, PushpendraP.Singh, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, B.Sulignano, S.Szilner, Ch.Theisen, C.A.Ur, M.Yalcinkaya

Shell evolution beyond N=40: ^{69, 71, 73}Cu

NUCLEAR REACTIONS ²³⁸U(⁷⁶Ge, X)⁶⁹Cu/⁷¹Cu/⁷³Cu, E=577 MeV; measured Eγ, Iγ, yields of reaction products level half-lives by RDDS method using AGATA demonstrator array coupled to PRISMA spectrometer at Tandem-XTU and ALPI LINAC facilities at LNL, Legnaro. ^69,71,73Cu; deduced levels, J, π, B(E2), configuration. Comparison with the state-of-the-art shell-model calculations.

doi: 10.1103/PhysRevC.91.034302
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2015SA40      Phys.Rev. C 92, 044322 (2015)

J.Samorajczyk, M.Klintefjord, Ch.Droste, A.Gorgen, T.Marchlewski, J.Srebrny, T.Abraham, F.L.Bello Garrote, E.Grodner, K.Hadynska-Klek, M.Kisielinski, M.Komorowska, M.Kowalczyk, J.Kownacki, P.Napiorkowski, R.Szenborn, A.Stolarz, A.Tucholski, G.M.Tveten

Revised spin values of the 991 keV and 1599 keV levels in ¹⁴⁰Sm

RADIOACTIVITY ¹⁴⁰Eu(EC), (β⁺)[from ¹¹²Cd(³²S, X)¹⁴⁰Eu/¹⁴⁰Gd, E=155 MeV at Heavy Ion Laboratory of University of Warsaw]; measured Eγ, Iγ, γγ-coin, γγ(θ) using EAGLE array. ¹⁴⁰Sm; deduced levels, J, π. Systematics of low-lying low-spin states in N=78 nuclei ¹³⁴Ba, ¹³⁶Ce, ¹³⁸Nd, ¹⁴⁰Sm, ¹⁴²Gd, ¹⁴⁴Dy.

doi: 10.1103/PhysRevC.92.044322
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2015ST16      Phys.Rev. C 92, 044324 (2015)

C.Stahl, J.Leske, C.Bauer, D.Bazzacco, E.Farnea, A.Gottardo, P.R.John, C.Michelagnoli, N.Pietralla, M.Reese, E.Sahin, B.Birkenbach, A.Bracco, F.C.L.Crespi, G.de Angelis, P.Desesquelles, J.Eberth, A.Gadea, A.Gorgen, J.Grebosz, H.Hess, J.Jolie, A.Jungclaus, W.Korten, S.M.Lenzi, S.Lunardi, R.Menegazzo, D.Mengoni, V.Modamio, D.R.Napoli, A.Pullia, B.Quintana, F.Recchia, P.Reiter, D.Rosso, M.D.Salsac, P.-A.Soderstrom, O.Stezowski, Ch.Theisen, C.A.Ur, J.J.Valiente-Dobon

Population of the 2⁺_ms mixed-symmetry state of ¹⁴⁰Ba with the α-transfer reaction

NUCLEAR REACTIONS ¹²C(¹³⁶Xe, ¹⁴⁰Ba)⁸Be, E=500, 546 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin using AGATA demonstrator array at LNL, Legnaro. ¹⁴⁰Ba; deduced levels, J, π, energy and cross section of 2+ mixed-symmetry state. ¹³⁹Ba; observed γ rays populated in ¹²C(¹³⁶Xe, ¹³⁹Ba*)⁴He+αn.

doi: 10.1103/PhysRevC.92.044324
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2015VO11      Phys.Rev. C 92, 024619 (2015)

A.Vogt, B.Birkenbach, P.Reiter, L.Corradi, T.Mijatovic, D.Montanari, S.Szilner, D.Bazzacco, M.Bowry, A.Bracco, B.Bruyneel, F.C.L.Crespi, G.de Angelis, P.Desesquelles, J.Eberth, E.Farnea, E.Fioretto, A.Gadea, K.Geibel, A.Gengelbach, A.Giaz, A.Gorgen, A.Gottardo, J.Grebosz, H.Hess, P.R.John, J.Jolie, D.S.Judson, A.Jungclaus, W.Korten, S.Leoni, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, G.Montagnoli, D.Napoli, L.Pellegri, G.Pollarolo, A.Pullia, B.Quintana, F.Radeck, F.Recchia, D.Rosso, E.Sahin, M.D.Salsac, F.Scarlassara, P.-A.Soderstrom, A.M.Stefanini, T.Steinbach, O.Stezowski, B.Szpak, Ch.Theisen, C.Ur, J.J.Valiente-Dobon, V.Vandone, A.Wiens

Light and heavy transfer products in ¹³⁶Xe + ²³⁸U multinucleon transfer reactions

NUCLEAR REACTIONS ²³⁸U(¹³⁶Xe, F)¹³⁰Ba/¹³¹Ba/¹³²Ba/¹³³Ba/¹³⁴Ba/¹³⁵Ba/¹³⁶Ba/¹³⁷Ba/¹³⁸Ba/¹³⁹Ba/¹⁴⁰Ba/¹⁴¹Ba/¹⁴²Ba/¹⁴³Ba/¹⁴⁴Ba, ¹²³Cs/¹²⁴Cs/¹²⁵Cs/¹²⁶Cs/¹²⁷Cs/¹²⁸Cs/¹²⁹Cs/¹³⁰Cs/¹³¹Cs/¹³²Cs/¹³³Cs/¹³⁴Cs/¹³⁵Cs/¹³⁶Cs/¹³⁷Cs/¹³⁸Cs/¹³⁹Cs/¹⁴⁰Cs/¹⁴¹Cs/¹⁴²Cs/¹⁴³Cs/¹²⁶Xe/¹²⁷Xe/¹²⁸Xe/¹²⁹Xe/¹³⁰Xe/¹³¹Xe/¹³²Xe/¹³³Xe/¹³⁴Xe/¹³⁵Xe/¹³⁶Xe/¹³⁷Xe/¹³⁸Xe/¹³⁹Xe/¹⁴⁰Xe/¹⁴¹Xe/¹⁴²Xe/¹²²I/¹²³I/¹²⁴I/¹²⁵I/¹²⁶I/¹²⁷I/¹²⁸I/¹²⁹I/¹³⁰I/¹³¹I/¹³²I/¹³³I/¹³⁴I/¹³⁵I/¹³⁶I/¹³⁷I/¹³⁸I/¹³⁹I/¹⁴⁰I/¹⁴¹I/¹²¹Te/¹²²Te/¹²³Te/¹²⁴Te/¹²⁵Te/¹²⁶Te/¹²⁷Te/¹²⁸Te/¹²⁹Te/¹³⁰Te/¹³¹Te/¹³²Te/¹³³Te/¹³⁴Te/¹³⁵Te/¹³⁶Te/²³⁶U/²³⁷U/²³⁸U/²³⁹U/²⁴⁰U/Th/Ac/Np/Pu, E=1 GeV; measured projectile-like reaction products, Doppler-corrected Eγ, Iγ, (particle)γ-coin, E(x ray), I(x ray) for Z=89-94 products, yield distribution of Z=31-57 products, mass spectra for Te to Ba region, σ, time-of-flight difference spectrum using PRISMA magnetic spectrometer, multichannel-plate detector DANTE, and Advanced Gamma Tracking Array (AGATA) at PIAVE-ALPI accelerator complex of INFN-LNL-Lenargo; deduced Matrix of time difference between PRISMA and DANTE as function of the total kinetic energy loss (TKEL) for particle transfer, fission, and elastically scattered ¹³⁶Xe events, mass-integrated yields of actinide nuclei. ⁷⁴Ge(n, n'γ), E=transfer neutrons; measured Iγ of neutron-induced background radiation with gates on the transfer- and fission-like Δ(TOF) peak. ^236,238U; deduced levels J, π, rotational bands. ²³⁹U; observed γ-rays. Comparison with coupled-channel semiclassical calculations using GRAZING code.

doi: 10.1103/PhysRevC.92.024619
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2015ZE02      Eur.Phys.J. A 51, 50 (2015)

T.Zerrouki, C.M.Petrache, R.Leguillon, K.Hauschild, A.Korichi, A.Lopez-Martens, S.Frauendorf, I.Ragnarsson, H.Hubel, A.Neusser-Neffgen, A.Al-Khatib, P.Bringel, A.Burger, N.Nenoff, G.Schonwasser, A.K.Singh, D.Curien, G.B.Hagemann, B.Herskind, G.Sletten, P.Fallon, A.Gorgen, P.Bednarczyk

Shape evolution and magnetic rotation in ¹⁴¹Nd

NUCLEAR REACTIONS ⁹⁶Zr(⁴⁸Ca, 3n), E not given; measured Eγ, Iγ, γγ-coin using EUROBALL spectrometer. ¹⁴¹Nd deduced levels, J, π, γ transitions, high-spin states, γ transitions multipolarity, γ anisotropy, quadrupole high-spin bands; calculated interpretation of high-spin bands, deformation, quadrupole moment, inertia moment, triaxial deformation, shape evolution, B(M1), B(E2), neutron single-particle Routhians using cranked Nilsson-Strutinsky and tilted axis cranking models.

doi: 10.1140/epja/i2015-15050-y
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2014CR03      Phys.Rev.Lett. 13, 012501 (2014)

F.C.L.Crespi, A.Bracco, R.Nicolini, D.Mengoni, L.Pellegri, E.G.Lanza, S.Leoni, A.Maj, M.Kmiecik, R.Avigo, G.Benzoni, N.Blasi, C.Boiano, S.Bottoni, S.Brambilla, F.Camera, S.Ceruti, A.Giaz, B.Million, A.I.Morales, V.Vandone, O.Wieland, P.Bednarczyk, M.Ciemala, J.Grebosz, M.Krzysiek, K.Mazurek, M.Zieblinski, D.Bazzacco, M.Bellato, B.Birkenbach, D.Bortolato, E.Calore, B.Cederwall, L.Charles, G.de Angelis, P.Desesquelles, J.Eberth, E.Farnea, A.Gadea, A.Gorgen, A.Gottardo, R.Isocrate, J.Jolie, A.Jungclaus, N.Karkour, W.Korten, R.Menegazzo, C.Michelagnoli, P.Molini, D.R.Napoli, A.Pullia, F.Recchia, P.Reiter, D.Rosso, E.Sahin, M.D.Salsac, B.Siebeck, S.Siem, J.Simpson, P.-A.Soderstrom, O.Stezowski, Ch.Theisen, C.Ur, J.J.Valiente-Dobon

Isospin Character of Low-Lying Pygmy Dipole States in ²⁰⁸Pb via Inelastic Scattering of ¹⁷O Ions

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁷O, ¹⁷O), E=340 MeV; measured reaction products, Eγ, Iγ; deduced σ, σ(θ), B(E1). Comparison with DWBA calculations.

doi: 10.1103/PhysRevLett.113.012501
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2014DU11      Nucl.Data Sheets 119, 233 (2014)

Q.Ducasse, B.Jurado, M.Aiche, L.Mathieu, T.Tornyi, A.Gorgen, J.N.Wilson, G.Barreau, I.Companis, S.Czajkowski, F.Giacoppo, F.Gunsing, M.Guttormsen, A.C.Larsen, M.Lebois, J.Matarranz, T.Renstrom, S.Rose, S.Siem, I.Tsekhanovich, G.M.Tveten, T.W.Hagen, M.Wiedeking, O.Serot, G.Boutoux, P.Chau, V.Meot, O.Roig

Neutron-induced Cross Sections of Actinides via the Surrogate-reaction Method

NUCLEAR REACTIONS ²³⁸U(d, p), E=15 MeV;²³⁸U(³He, t), (³He, α), E=24 MeV; measured ejectiles, fission fragments, coincidences using SiRi detector and PPAC fission detectors, Eγ, Iγ using NaI CACTUS detectors. ²³⁸U(n, F), E^*=5.55-7.25 MeV; deduced fission probability. ²³⁸U(n, γ), E^*=4.65-5.9 MeV; deduced γ-decay probability using surrogate method. ²³⁸U(n, F), E^*=4.8-7.25 MeV; calculated fission probability using TALYS. Preliminary. Fission probability compared with results of Cramer and Britt. Further analysis in progress.

doi: 10.1016/j.nds.2014.08.064
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2014ER04      Phys.Rev. C 90, 044311 (2014)

T.K.Eriksen, H.T.Nyhus, M.Guttormsen, A.Gorgen, A.C.Larsen, T.Renstrom, I.E.Ruud, S.Siem, H.K.Toft, G.M.Tveten, J.N.Wilson

Pygmy resonance and low-energy enhancement in the γ-ray strength functions of Pd isotopes

NUCLEAR REACTIONS ^106,108Pd(³He, ³He'), (³He, α), E=38 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle telescope and CACTUS γ-detector array at Oslo cyclotron facility. ^{105,106,107,108}Pd; deduced level densities, γ-ray strength functions, pygmy dipole resonances (PDR) at E(-γ)=8 MeV, low-energy enhancement of the strength function for ¹⁰⁵Pd as compared to the low-energy tail of the giant dipole resonance (GDR), and neutron number dependency of the PDR strength. Comparison with results from (γ, n) data.

doi: 10.1103/PhysRevC.90.044311
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2014GI08      Phys.Rev. C 90, 054330 (2014)

F.Giacoppo, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, T.K.Eriksen, R.B.Firestone, A.Gorgen, M.Guttormsen, T.W.Hagen, B.V.Kheswa, M.Klintefjord, P.E.Koehler, A.C.Larsen, H.T.Nyhus, T.Renstrom, E.Sahin, S.Siem, T.Tornyi

Level densities and thermodynamical properties of Pt and Au isotopes

NUCLEAR REACTIONS ¹⁹⁵Pt(d, p), (p, p'), (p, d), E=11.3, 16.5 MeV; ¹⁹⁷Au(d, p), (d, d'), E=12.5 MeV; ¹⁹⁷Au(³He, ³He'), E=34.0 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle detector array and CACTUS multidetector array for γ rays at Oslo cyclotron facility. ^194,195,196Pt, ^197,198Au; deduced level densities from the population of excited states below S(n), density as function of temperature, single-particle level space for the last unpaired valence neutron, heat capacity and temperature, evidence of consecutive breaking of nucleon Cooper pairs in the heated nuclear system.

doi: 10.1103/PhysRevC.90.054330
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2014GU04      Phys.Rev. C 89, 014302 (2014)

M.Guttormsen, L.A.Bernstein, A.Gorgen, B.Jurado, S.Siem, M.Aiche, Q.Ducasse, F.Giacoppo, F.Gunsing, T.W.Hagen, A.C.Larsen, M.Lebois, B.Leniau, T.Renstrom, S.J.Rose, T.G.Tornyi, G.M.Tveten, M.Wiedeking, J.N.Wilson

Scissors resonance in the quasicontinuum of Th, Pa, and U isotopes

NUCLEAR REACTIONS ²³²Th(d, d'), (d, p), E=12 MeV; ²³²Th(³He, ³He'), (³He, d), (³He, t), (³He, α), E=24 MeV; ²³⁸U(d, d'), (d, p), (d, t), E=15 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle telescope and CACTUS γ-detector array at Oslo cyclotron facility. ^231,232,233Th, ^232,233Pa, ^237,238,239U; deduced γ strength functions in the quasicontinuum, low-energy M1 scissors resonance (SR), level densities using Oslo method Comparison with previous (γ, γ') experimental results, and with theoretical model calculations.

doi: 10.1103/PhysRevC.89.014302
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2014GU21      Phys.Rev. C 90, 044309 (2014)

M.Guttormsen, A.C.Larsen, F.L.Bello Garrote, Y.Byun, T.K.Eriksen, F.Giacoppo, A.Gorgen, T.W.Hagen, M.Klintefjord, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.Tornyi, G.M.Tveten, A.Voinov

Shell-gap-reduced level densities in ^{89, 90}Y

NUCLEAR REACTIONS ⁸⁹Y(p, p'), E=17 MeV; ⁸⁹Y(d, p), E=11 MeV; measured Eγ, Iγ, γγ-coin, particle-γ-coin using CACTUS array at Oslo cyclotron laboratory. ^89,90Y; deduced shell-gap-reduced level densities using Oslo method; calculated single-particle orbitals using Nilsson model, proton and neutron quasi-particle energies and pair breaking number, parity asymmetries. Comparison with combinatorial quasiparticle model, and temperature dependent combinatorial model with the D1M Gogny force (TDCG). Systematics of level densities for N=46-56 Sr, Y and Zr nuclei.

doi: 10.1103/PhysRevC.90.044309
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2014HE29      Phys.Rev. C 90, 051303 (2014)

J.Henderson, D.G.Jenkins, K.Kaneko, P.Ruotsalainen, P.Sarriguren, K.Auranen, M.A.Bentley, P.J.Davies, A.Gorgen, T.Grahn, P.T.Greenlees, A.Hay, T.W.Henry, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, C.McPeake, S.Milne, A.J.Nichols, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, E.Sahin, M.Sandzelius, J.Saren, C.Scholey, M.Siciliano, L.Sinclair, J.Sorri, S.Stolze, J.Uusitalo, R.Wadsworth, M.Zielinska

Spectroscopy on the proton drip-line: Probing the structure dependence of isospin nonconserving interactions

NUCLEAR REACTIONS ⁴⁰Ca(³⁶Ar, 2n)⁷⁴Sr, E=105 MeV; measured Eγ, Iγ, γγ-coin, Eβ, ΔE-E, TOF, half-lives of ⁷⁴Sr and ⁷⁴Rb ground states using RITU separator and JUROGAM II array at Jyvaskyla K130 cyclotron facility. Recoil-beta tagging technique. ⁷⁴Sr, ⁷⁴Rb; deduced levels, J, π, T=1 triplet energy differences (TEDs) for ⁷⁴Sr, ⁷⁴Rb and ⁷⁴Kr. Comparison with State-of-the-art shell-model calculations using the JUN45 interaction, and isospin nonconserving (INC) interaction.

RADIOACTIVITY ⁷⁴Sr, ⁷⁴Rb(β⁺)[from ⁴⁰Ca(³⁶Ar, X), E=105 MeV]; measured half-lives of ground states.

doi: 10.1103/PhysRevC.90.051303
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2014JO05      Phys.Rev. C 90, 021301 (2014)

P.R.John, V.Modamio, J.J.Valiente-Dobon, D.Mengoni, S.Lunardi, T.R.Rodriguez, D.Bazzacco, A.Gadea, C.Wheldon, T.Alexander, G.de Angelis, N.Ashwood, M.Barr, G.Benzoni, B.Birkenbach, P.G.Bizzeti, A.M.Bizzeti-Sona, S.Bottoni, M.Bowry, A.Bracco, F.Browne, M.Bunce, F.Camera, B.Cederwall, L.Corradi, F.C.L.Crespi, P.Desesquelles, J.Eberth, E.Farnea, E.Fioretto, A.Gorgen, A.Gottardo, J.Grebosz, L.Grente, H.Hess, A.Jungclaus, Tz.Kokalova, A.Korichi, W.Korten, A.Kusoglu, S.Lenzi, S.Leoni, J.Ljungvall, G.Maron, W.Meczynski, B.Melon, R.Menegazzo, C.Michelagnoli, T.Mijatovic, B.Million, P.Molini, G.Montagnoli, D.Montanari, D.R.Napoli, P.Nolan, C.Oziol, Zs.Podolyak, G.Pollarolo, A.Pullia, B.Quintana, F.Recchia, P.Reiter, O.J.Roberts, D.Rosso, E.Sahin, M.-D.Salsac, F.Scarlassara, M.Sferrazza, J.Simpson, P.-A.Soderstrom, A.M.Stefanini, O.Stezowski, S.Szilner, Ch.Theisen, C.A.Ur, J.Walshe

Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of ¹⁹⁶Os

NUCLEAR REACTIONS ¹⁹⁸Pt(⁸²Se, X), E=426 MeV; measured Eγ, Iγ, γγ-, (⁸⁴Kr)γ-coin using PRISMA spectrometer for fragments and AGATA array for γ rays at Tandem-ALPI-LNL accelerator facility. ¹⁹⁶Os; deduced levels, J, π, γ-unstable/triaxial rotor yrast band. Comparison with state-of-the-art beyond-mean-field calculations.

NUCLEAR STRUCTURE ^{188,190,192,194,196,198}Os; calculated particle number projected potential energy surfaces in (β₂, γ) plane, level energies in the yrast bands using Gogny D1S interaction. State-of-the-art beyond-meanfield calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.90.021301
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Data from this article have been entered in the XUNDL database. For more information, click here.

2014KR05      Phys.Scr. 89, 054016 (2014)

M.Krzysiek, M.Kmiecik, A.Maj, P.Bednarczyk, M.Ciemala, B.Fornal, J.Grebosz, K.Mazurek, W.Meczynski, M.Zieblinski, F.C.L.Crespi, A.Bracco, G.Benzoni, N.Blasi, C.Boiano, S.Bottoni, S.Brambilla, F.Camera, A.Giaz, S.Leoni, B.Million, A.I.Morales, R.Nicolini, L.Pellegri, S.Riboldi, V.Vandone, O.Wieland, G.De Angelis, D.R.Napoli, J.J.Valiente-Dobon, D.Bazzacco, E.Farnea, A.Gottardo, S.Lenzi, S.Lunardi, D.Mengoni, C.Michelagnoli, F.Recchia, C.Ur, A.Gadea, T.Huyuk, D.Barrientos, B.Birkenbach, K.Geibel, H.Hess, P.Reiter, T.Steinbach, A.Wiens, A.Burger, A.Gorgen, M.Guttormsen, A.C.Larsen, S.Siem

Study of the soft dipole modes in ¹⁴⁰Ce via inelastic scattering of ¹⁷O

NUCLEAR REACTIONS ¹⁴⁰Ce(¹⁷O, ¹⁷O), E=20 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced angular distributions of emitted γ-rays and spectra.

doi: 10.1088/0031-8949/89/5/054016
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2014LA15      Phys.Rev. C 89, 064312 (2014)

S.Lalkovski, D.Ivanova, E.A.Stefanova, A.Korichi, P.Petkov, J.Kownacki, T.Kutsarova, A.Minkova, D.Bazzacco, M.Bergstrom, A.Gorgen, B.Herskind, H.Hubel, A.Jansen, S.Kisyov, T.L.Khoo, F.G.Kondev, A.Lopez-Martens, Zs.Podolyak, G.Schonwasser, O.Yordanov

Coexisting structures in ¹⁰⁵Ru

NUCLEAR REACTIONS ¹⁶⁸Er(³⁰Si, F), E=142 MeV; measured Eγ, Iγ, γγ-coin using EUROBALL III spectrometer. ¹⁰⁵Ru; deduced high-spin levels, J, π, bands, conversion coefficient, multipolarity, B(M1), B(E2). Comparison with rigid-triaxial-rotor-plus-particle model and shell-model calculations, and previous experimental results and evaluated data.

doi: 10.1103/PhysRevC.89.064312
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Data from this article have been entered in the XUNDL database. For more information, click here.

2014PE17      Phys.Lett. B 738, 519 (2014)

L.Pellegri, A.Bracco, F.C.L.Crespi, S.Leoni, F.Camera, E.G.Lanza, M.Kmiecik, A.Maj, R.Avigo, G.Benzoni, N.Blasi, C.Boiano, S.Bottoni, S.Brambilla, S.Ceruti, A.Giaz, B.Million, A.I.Morales, R.Nicolini, V.Vandone, O.Wieland, D.Bazzacco, P.Bednarczyk, M.Bellato, B.Birkenbach, D.Bortolato, B.Cederwall, L.Charles, M.Ciemala, G.De Angelis, P.Desesquelles, J.Eberth, E.Farnea, A.Gadea, R.Gernhauser, A.Gorgen, A.Gottardo, J.Grebosz, H.Hess, R.Isocrate, J.Jolie, D.Judson, A.Jungclaus, N.Karkour, M.Krzysiek, E.Litvinova, S.Lunardi, K.Mazurek, D.Mengoni, C.Michelagnoli, R.Menegazzo, P.Molini, D.R.Napoli, A.Pullia, B.Quintana, F.Recchia, P.Reiter, M.D.Salsac, B.Siebeck, S.Siem, J.Simpson, P.-A.Soderstrom, O.Stezowski, Ch.Theisen, C.Ur, J.J.Valiente Dobon, M.Zieblinski

Pygmy dipole resonance in ¹²⁴Sn populated by inelastic scattering of ¹⁷O

NUCLEAR REACTIONS ¹²⁴Sn(¹⁷O, ¹⁷O'), E=340 MeV; measured reaction products, Eγ, Iγ; deduced σ(θ), Form factors, isoscalar strength distribution, pigmy dipole resonance. Comparison with DWBA calculations.

doi: 10.1016/j.physletb.2014.08.029
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0761.