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NSR database version of April 11, 2024.

Search: Author = C.Fransen

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2024VO01      Phys.Rev. C 109, 024325 (2024)

F.von Spee, M.Beckers, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, C.Fransen, G.Hackenberg, J.Jolie, L.Knafla, C.-D.Lakenbrink, M.Schiffer, N.Warr, M.Weinert

Structure of low-lying states in 116Te

doi: 10.1103/PhysRevC.109.024325
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2023BE08      Eur.Phys.J. A 59, 129 (2023)

M.Beckers, C.Muller-Gatermann, K.Arnswald, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, F.von Spee

Lifetime measurement of the 2+1, 4+1 states in semi-magic 60Ni

NUCLEAR REACTIONS 40Ca(23Na, 3p), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, level T1/2, B(E2). Comparison with Shell-Model calculations. Differential Decay Curve Method (DDCM), the Institute for Nuclear Physics of the University of Cologne FN tandem accelerator.

doi: 10.1140/epja/s10050-023-01031-6
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2023HA29      Phys.Rev. C 108, 024305 (2023)

A.Harter, A.Esmaylzadeh, L.Knafla, C.Fransen, F.v.Spee, J.Jolie, M.Ley, V.Karayonchev, J.Fischer, A.Pfeil

Lifetime measurements in low yrast states and spectroscopic peculiarities in 182Os

NUCLEAR REACTIONS 174Yb(12C, 4n)182Os, E=66 MeV; measured Eγ, Iγ, γγ-coin. 182Os; deduced levels, J, π, T1/2 of yrast 2+, 4+ and 6+ excited states, B(E2), quadrupole deformation parameter. Comparison to interacting boson model 1 (IBM-1) based calculations. Systematics of level energies for Os isotopes - 180,182,184,186Os and for N=106 isotones Hf, W, Os, Pt, Hg. Obtained values support the interpretation of 182Os as a rigid rotor. HORUS spectrometer equipped with 10 LaBr3(Ce) scintillators and 8 HPGe detectors at Cologne 10 MV FN-Tandem accelerator.

doi: 10.1103/PhysRevC.108.024305
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2023KA31      Phys.Rev. C 108, 054302 (2023)

V.Karayonchev, J.Jolie, D.Bittner, M.Beckers, A.Esmaylzadeh, J.Fischer, C.Fransen, J.Garbe, L.Knafla, C.-D.Lakenbrink, M.Ley

Lifetime measurements in 206Po with a shell-model interpretation

doi: 10.1103/PhysRevC.108.054302
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2023KL03      Phys.Rev. C 108, 064308 (2023)

H.Kleis, K.Arnswald, A.Blazhev, M.Droste, P.Reiter, R.Abels, R.Burggraf, A.Esmaylzadeh, C.Fransen, R.Hirsch, V.Karayonchev, D.Luyken, J.Wehlitz, D.Werner

Lifetime measurements of excited states in 57Mn

doi: 10.1103/PhysRevC.108.064308
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2023LA11      Eur.Phys.J. A 59, 290 (2023)

C.-D.Lakenbrink, M.Beckers, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, Ch.Fransen, J.Jolie, L.Knafla, C.Muller-Gatermann, F.von Spee, K.-O.Zell

Lifetime measurement of excited states in 116Xe

NUCLEAR REACTIONS 102Pd(16O, 2n), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, J, π, level T1/2, B(E2), The recoil-distance Doppler-shift (RDDS) technique, the FN-tandem accelerator at the University of Cologne, Germany, using the Cologne coincidence plunger device.

doi: 10.1140/epja/s10050-023-01204-3
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2023LE18      Phys.Rev. C 108, 064313 (2023)

M.Ley, L.Knafla, J.Jolie, A.Esmaylzadeh, A.Harter, A.Blazhev, C.Fransen, A.Pfeil, J.-M.Regis, P.Van Isacker

Lifetime measurements in 92Mo: Investigation of seniority conservation in the N=50 isotones

doi: 10.1103/PhysRevC.108.064313
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2023MO04      Phys.Lett. B 838, 137675 (2023)

L.Morrison, K.Hadynska-Klek, Zs.Podolyak, L.P.Gaffney, M.Zielinska, B.A.Brown, H.Grawe, P.D.Stevenson, T.Berry, A.Boukhari, M.Brunet, R.Canavan, R.Catherall, J.Cederkall, S.J.Colosimo, J.G.Cubiss, H.De Witte, D.T.Doherty, Ch.Fransen, G.Georgiev, E.Giannopoulos, M.Gorska, H.Hess, L.Kaya, T.Kroll, N.Lalovic, B.Marsh, Y.Martinez Palenzuela, G.O'Neill, J.Pakarinen, J.P.Ramos, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, M.Rudigier, M.Siciliano, E.C.Simpson, J.Snall, P.Spagnoletti, S.Thiel, N.Warr, F.Wenander, R.Zidarova

Quadrupole and octupole collectivity in the semi-magic nucleus 20680Hg126

NUCLEAR REACTIONS 94Mo, 104Pd(206Hg, 206Hg'), E=4.195 MeV/nucleon; measured reaction products, Eγ, Iγ. 206Hg; deduced γ-ray energies, B(E2), B(E3). Comparison with shell model predictions, systematics. The HIE-ISOLDE facility at CERN.

doi: 10.1016/j.physletb.2023.137675
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2023ST05      Phys.Rev. C 108, 014316 (2023)

K.Stoychev, M.Djongolov, V.Karayonchev, G.Rainovski, M.Ley, J.Jolie, D.Bittner, A.Blazhev, F.Dunkel, A.Esmaylzadeh, C.Fransen, J.Garbe, L.M.Gerhard, R.-B.Gerst, K.Geusen, K.A.Gladnishki, G.Hafner, D.Kalaydjieva, L.Klockner, L.Knafla, D.Kocheva, L.Kornwebel, C.Muller-Gatermann, E.Nikodem, J.-M.Regis, K.Schomacker, M.Stoyanova

X-ray-γ fast-timing lifetime measurement of the 6+1 state in 206Po

RADIOACTIVITY 206Po(IT)[from successive EC decay of 206Rn(EC)-206At(EC) produced in 194Pt(16O, 4n)206Rn, E=84 MeV]; measured X-rays, Eγ, Iγ, (X-rays)γ-coin, γγγ-coin. 206Po; deduced levels, J, π, T1/2 of the 4+ and 6+ excited states, B(E2). Lifetimes extracted via the generalized centroid difference (GCD) method. Systematics of the B(E2) for even-even Po isotopes with N<126. HORUS spectrometer consisting of 8 coaxial HPGe and 11 LaBr detectors at the FN-Tandem facility (Institute for Nuclear Physics, University of Cologne).

doi: 10.1103/PhysRevC.108.014316
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2022BE25      Nucl.Instrum.Methods Phys.Res. A1042, 167416 (2022)

M.Beckers, A.Dewald, C.Fransen, L.Kornwebel, C.-D.Lakenbrink, F.von Spee

Revisiting the measurement of absolute foil-separation for RDDS measurements and introduction of an optical measurement method

NUCLEAR REACTIONS 181Ta(32S, 32S), E=85 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, absolute foil separations for plunger measurements using a high precision optical distance probe. The capacitance method, the Cologne FN Tandem accelerator.

doi: 10.1016/j.nima.2022.167416
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2022DR04      Phys.Rev. C 106, 024329 (2022)

M.Droste, A.Blazhev, P.Reiter, K.Arnswald, M.Beckers, C.Fransen, R.Hetzenegger, R.Hirsch, L.Kaya, L.Knafla, L.Lewandowski, C.Muller-Gatermann, P.Petkov, D.Rosiak, M.Seidlitz, B.Siebeck, A.Vogt, N.Warr, K.Wolf

Lifetime measurements in the ground-state band in 104Pd

NUCLEAR REACTIONS 96Zr(12C, 4n)104Pd, E=55 MeV; measured Eγ, Iγ, γγ-coin, level T1/2 by recoil distance Doppler-shift (RDDS) method and differential decay-curve method (DDCM) using 12 HPGe detectors and Cologne coincidence-plunger device at the FN tandem accelerator of the University of Cologne. 104Pd; deduced levels, J, π, T1/2 of levels up to 12+ in the g.s. yrast band, B(E2). Comparison with large-scale shell-model calculations (LSSM) with SR88MHJM interaction, and with available previous experimental values.

NUCLEAR STRUCTURE 96,98,100,102,104,106Pd; calculated energy(first 4+)/energy(first 2+), B(E2)(first 4+)/B(E2)(first 2+), excitation energies and B(E2) up to 10+ in the g.s. band. 104Pd; calculated Eγ and B(E2) for levels up to 26+ in the g.s. band, occupation numbers for first 8+, 10+ and 12+, and second 10+ levels. Large-scale shell-model calculations (LSSM) with SR88MHJM interaction. Comparison with available experimental data.

doi: 10.1103/PhysRevC.106.024329
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2022ES05      Phys.Rev. C 106, 064323 (2022)

A.Esmaylzadeh, A.Blazhev, K.Nomura, J.Jolie, M.Beckers, C.Fransen, R.-B.Gerst, A.Harter, V.Karayonchev, L.Knafla, M.Ley, F.von Spee

Investigation of γ softness: Lifetime measurements in 104, 106Ru

NUCLEAR REACTIONS 104Ru(18O, 18O), (18O, 16O), E=57 MeV; measured reaction products, Eγ, Iγ, (particle)γ-coin. 104,106Ru; deduced levels, J, π, T1/2 of low-lying excited states, B(E2), B(M1), shape invariants. Recoil-distance Doppler shift technique. Comparison to mapped-IBM calculation based on a microscopic energy density functional, to the values obtained with Wilets-Jean γ-soft model and to previous experimental data. Results indicate γ-softness and point on traixilaity in 104,106Ru. Cologne plunger device in conjunction with 11 HPGe detectors arranged in backward and forward rings combined with 6 PIN diodes for detecting the backscattered beam-like light recoiling fragments 10 MV FN-Tandem accelerator.

doi: 10.1103/PhysRevC.106.064323
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2022HA24      Phys.Rev. C 106, 024326 (2022)

A.Harter, L.Knafla, G.Friessner, G.Hafner, J.Jolie, A.Blazhev, A.Dewald, F.Dunkel, A.Esmaylzadeh, C.Fransen, V.Karayonchev, K.Lawless, M.Ley, J.-M.Regis, K.O.Zell

Lifetime measurements in the tungsten isotopes 176, 178, 180W

NUCLEAR REACTIONS 164Dy(16O, 4n)176W, E=80 MeV; 172Yb(9Be, 3n)178W, E=40 MeV; 181Ta(p, 2n)180W, E=16 MeV; measured E(ce), Eγ, (ce)γ-coin, (ce)γγ-coin, γγ-coin, level T1/2 by (ce)γ(t) fast-timing method, and by recoil-distance Doppler-shift method using Cologne iron-free Orange spectrometer for conversion electrons, Cologne HORUS spectrometer for γ radiation, and Cologne coincidence plunger setup at the 10 MV FN Tandem accelerator of IKP-Cologne. 176,178,180W; deduced levels, J, π, T1/2, B(E2) of yrast positive-parity states up to 10+ for 176W and up to 8+ for 178,180W. Comparison with previous available experimental results, and with IBM-1 model calculations. Experimental and theoretical (by IBM-1 model with SU(3) and X(5) limits) systematics of excitation energies, deformation parameter β, quadrupole moment, B(E2), E(first 4+)/E(first 2+), B(E2)(first 4+)/B(E2)(first 2+) for 168,170,172,174,176,178,180,182,184,186W.

doi: 10.1103/PhysRevC.106.024326
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2022KA40      Phys.Rev. C 106, 044321 (2022)

V.Karayonchev, A.Blazhev, J.Jolie, A.Dewald, A.Esmaylzadeh, C.Fransen, G.Hafner, L.Knafla, C.Muller-Gatermann, G.Rainovski, J.-M.Regis, K.Schomacker, P.Van Isacker

New aspects of the low-energy structure of 211At

NUCLEAR REACTIONS 209Bi(16O, 14C)211At, E=84 MeV; measured recoiling beam-like nuclei, Eγ, Iγ, (particle)γ-coin. 211At; deduced levels, J, π, high-spin states, T1/2 of the excited states, B(E2). Recoil-distance Doppler shift and the Doppler-shift attenuation methods. Comparison to two shell-model calculations, one using the Kuo-Herling residual interaction and the other using a single-j approximation for protons in the 0h9/2 orbital. Comparison to other experimental data. Cologne plunger device with 11 HPGe detectors positioned in two rings at FN-Tandem accelerator (University of Cologne).

doi: 10.1103/PhysRevC.106.044321
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2022KA52      Phys.Rev. C 106, 064305 (2022)

V.Karayonchev, G.Rainovski, J.Jolie, A.Blazhev, A.Dewald, A.Esmaylzadeh, C.Fransen, P.John, L.Knafla, D.Kocheva, K.Schomacker, V.Werner, H.Naidja

Lifetime measurements in the yrast band of 212Po with a shell-model investigation

NUCLEAR REACTIONS 208Pb(18O, 14C)212Po, E=85 MeV; measured reaction products, Eγ, Iγ, γγ-coin, (particle)γ-coin. 212Po; deduced levels, J, π, B(E2), T1/2 of first 4+ and 6+ states; calculated levels, J, π, B(E2). Lifetimes obtained with recoil-distance Doppler-shift (RDDS) method. Shell-model calculations performed using H208 and KHPE interaction. Cologne plunger device, array of 11 HPGe detectors and array of 6 photovoltaic pin-diodes at FN-TANDEM accelerator (University of Cologne).

doi: 10.1103/PhysRevC.106.064305
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2022PE15      Phys.Rev.Lett. 129, 112501 (2022)

R.M.Perez-Vidal, A.Gadea, C.Domingo-Pardo, A.Gargano, J.J.Valiente-Dobon, E.Clement, A.Lemasson, L.Coraggio, M.Siciliano, S.Szilner, M.Bast, T.Braunroth, J.Collado, A.Corina, A.Dewald, M.Doncel, J.Dudouet, G.de France, C.Fransen, V.Gonzalez, T.Huyuk, B.Jacquot, P.R.John, A.Jungclaus, Y.H.Kim, A.Korichi, M.Labiche, S.Lenzi, H.Li, J.Ljungvall, A.Lopez-Martens, D.Mengoni, C.Michelagnoli, C.Muller-Gatermann, D.R.Napoli, A.Navin, B.Quintana, D.Ramos, M.Rejmund, E.Sanchis, J.Simpson, O.Stezowski, D.Wilmsen, M.Zielinska, A.J.Boston, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, H.C.Boston, A.Bracco, B.Cederwall, D.M.Cullen, F.Didierjean, J.Eberth, A.Gottardo, J.Goupil, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Kaskas, W.Korten, S.Leoni, R.Menegazzo, B.Million, J.Nyberg, Zs.Podolyak, A.Pullia, D.Ralet, F.Recchia, P.Reiter, K.Rezynkina, M.D.Salsac, M.Senyigit, D.Sohler, C.Theisen, D.Verney

Evidence of Partial Seniority Conservation in the πg9/2 Shell for the N=50 Isotones

NUCLEAR REACTIONS 92Mo(92Mo, X)90Zr/92Mo/94Ru, E=717 MeV; measured reaction products, Eγ, Iγ. 93Tc, 94Ru, 94Mo; deduced level energies, J, π, lifetimes, B(E2). Multinucleon transfer (MNT) reactions, the Grand Acce'le'rateur d'Ions Lourds (GANIL) laboratory, in Caen (France). The Advanced GAmma Tracking Array (AGATA). The Recoil Distance Doppler Shift (RDDS) technique.

doi: 10.1103/PhysRevLett.129.112501
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2022SA39      Phys.Rev. C 106, 044324 (2022)

D.Savran, J.Isaak, R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, S.W.Finch, C.Fransen, U.Friman-Gayer, R.Gonzalez, E.Hoemann, R.V.F.Janssens, S.R.Johnson, M.D.Jones, J.Kleemann, Krishichayan, D.R.Little, D.O'Donnell, O.Papst, N.Pietralla, J.Sinclair, V.Werner, O.Wieland, J.Wilhelmy

Model-independent determination of the dipole response of 66Zn using quasimonoenergetic and linearly polarized photon beams

NUCLEAR REACTIONS 66Zn(polarized γ, γ'), E=5.6-9.9 MeV; measured Eγ, Iγ, γγ-coin; deduced elastic, inelastic and total photoabsorption σ(E), average ground-state branching ratio, ratio of M1 to E1 elastic σ(E). Comparison to other experimental results. γ3-detector setup consisting of HPGe and LaBr3:Ce detectors at HIγS facility of the TUNL at Duke University.

doi: 10.1103/PhysRevC.106.044324
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2021AR08      Phys.Lett. B 820, 136592 (2021)

K.Arnswald, A.Blazhev, F.Nowacki, P.Petkov, P.Reiter, T.Braunroth, A.Dewald, M.Droste, C.Fransen, R.Hirsch, V.Karayonchev, L.Kaya, L.Lewandowski, C.Muller-Gatermann, M.Seidlitz, B.Siebeck, A.Vogt, D.Werner, K.O.Zell

Enhanced quadrupole collectivity in doubly-magic 56Ni: Lifetime measurements of the 41+ and 61+ states

NUCLEAR REACTIONS 27Al(32S, 2np)56Ni, E=78 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, level lifetimes, B(E2). Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2021.136592
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2021CI02      Eur.Phys.J. A 57, 156 (2021)

M.Ciemala, S.Ziliani, F.C.L.Crespi, S.Leoni, B.Fornal, A.Maj, P.Bednarczyk, G.Benzoni, A.Bracco, C.Boiano, S.Bottoni, S.Brambilla, M.Bast, M.Beckers, T.Braunroth, F.Camera, N.Cieplicka-Orynczak, E.Clement, S.Coelli, O.Dorvaux, S.Erturk, G.De France, C.Fransen, A.Goldkuhle, J.Grebosz, M.N.Harakeh, L.W.Iskra, B.Jacquot, A.Karpov, M.Kicinska-Habior, Y.-H.Kim, M.Kmiecik, A.Lemasson, S.M.Lenzi, M.Lewitowicz, H.Li, I.Matea, K.Mazurek, C.Michelagnoli, M.Matejska-Minda, B.Million, C.Muller-Gatermann, V.Nanal, P.Napiorkowski, D.R.Napoli, R.Palit, M.Rejmund, Ch.Schmitt, M.Stanoiu, I.Stefan, E.Vardaci, B.Wasilewska, O.Wieland, M.Zieblinski, M.Zielinska

Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

NUCLEAR REACTIONS 181Ta(18O, X)17O/18O/19O/20O/24Mg/13C, E=126 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, lifetimes using a novel Monte Carlo technique. Doppler-shift, AGATA tracking array at GANIL.

doi: 10.1140/epja/s10050-021-00451-6
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2021ES04      Phys.Rev. C 103, 054324 (2021)

A.Esmaylzadeh, V.Karayonchev, G.Hafner, J.Jolie, M.Beckers, A.Blazhev, A.Dewald, C.Fransen, A.Goldkuhle, L.Knafla, C.Muller-Gatermann

Triaxiality in the mid-shell nucleus 112Pd

NUCLEAR REACTIONS 110Pd(18O, 16O)112Pd, E=56 MeV; measured Eγ, Iγ, (particle)γ-coin, half-lives of the 2+, 4+ and 6+ g.s. band members and 2+ level in γ band by recoil-distance Doppler shift (RDDS) and DDCM analysis methods using Cologne Plunger device and an array of 11 HPGe detectors at the Cologne FN Tandem accelerator facility. 112Pd; deduced levels, B(E2). Comparison with IBM-1 model calculations.

NUCLEAR STRUCTURE 112Pd; calculated levels, J, π, B(E2) for 2+, 4+, 6+, 8+ and 10+ states of the yrast band and 2+, 3+, 4+, 5+, 6+, 7+ and 8+ states of the γ-band using the Interacting Boson Model (IBM-1), the Davydov Filipov Model and the Wilets-Jean gamma-unstable model (or γ-soft model); deduced rigid triaxial nucleus and indicators for a γ-soft nucleus.

doi: 10.1103/PhysRevC.103.054324
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2021ES09      Phys.Rev. C 104, 064314 (2021)

A.Esmaylzadeh, V.Karayonchev, K.Nomura, J.Jolie, M.Beckers, A.Blazhev, A.Dewald, C.Fransen, R.-B.Gerst, G.Hafner, A.Harter, L.Knafla, M.Ley, L.M.Robledo, R.Rodriguez-Guzman, M.Rudigier

Lifetime measurements to investigate γ softness and shape coexistence in 102Mo

NUCLEAR REACTIONS 100Mo(18O, 16O)102Mo, E=52 MeV; measured Eγ, Iγ, γγ-coin, T1/2 of levels by recoil-distance Doppler-shift method using an array of eleven HPGe detectors, and Cologne Plunger device at the Cologne FN Tandem accelerator facility. 102Mo; deduced levels, J, π, B(E2), B(M1), E0 transition probability; calculated deformation-energy surface in the (β, γ) plane. Comparison of levels and B(E2) with mapped interacting boson model (IBM) calculations, with microscopic input from Gogny mean-field. Systematics of 0+ and first 2+ states and B(E2) values in N=52-64, Sr, Zr, Mo and Ru isotopes. Discussed shape coexistence and γ-softness.

doi: 10.1103/PhysRevC.104.064314
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2021HA23      Eur.Phys.J. A 57, 174 (2021)

G.Hafner, A.Esmaylzadeh, J.Jolie, J.-M.Regis, C.Muller-Gatermann, A.Blazhev, C.Fransen, R.-B.Gerst, V.Karayonchev, L.Knafla, N.Saed-Samii, K.-O.Zell

Lifetime measurements in 182Pt using γ-γ fast-timing

NUCLEAR REACTIONS 170Yb(16O, 4n), E=87 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, half lives, B(E2). Comparison with theoretical calculations in the framework of the sd-IBM with and without configuration mixing, γ-γ fast-timing technique.

doi: 10.1140/epja/s10050-021-00492-x
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2021KA19      Phys.Rev. C 103, 044309 (2021)

V.Karayonchev, M.Stoyanova, G.Rainovski, J.Jolie, A.Blazhev, M.Djongolov, A.Esmaylzadeh, C.Fransen, K.Gladnishki, L.Knafla, D.Kocheva, L.Kornwebel, J.-M.Regis, G.De Gregorio, A.Gargano

Lifetimes and structures of low-lying negative-parity states of 209Po

RADIOACTIVITY 209At(EC), (β+)[from successive α and ϵ decay of 213Fr, produced in 206Pb(11B, 4n)213Fr, E=56 MeV at the FN-Tandem facility of University of Cologne]; measured Eγ, Iγ, γγ-coin, level half-lives by γγ(t) fast-timing method and analyzed by generalized centroid difference (GCD) method using eight HPGe detectors and 12 LaBr scintillators, with six of these placed inside BGO anti-Compton shields. 209Po; deduced levels, J, π, B(M1), B(E2). Comparison with shell-model calculation using a microscopic effective interaction derived from the realistic CD-Bonn potential.

NUCLEAR STRUCTURE 209Po; calculated proton single-particle and neutron single-hole energies, levels, J, π, B(M1), B(E2), magnetic dipole and electric quadrupole moments, orbital composition and one-neutron pick-up spectroscopic factors of selected states, E2 matrix elements. Shell-model calculations with a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential within the framework of Q-box folded-diagram approach. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.044309
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2021KA36      Phys.Rev. C 104, 024311 (2021)

D.Kalaydjieva, D.Kocheva, G.Rainovski, V.Karayonchev, J.Jolie, N.Pietralla, M.Beckers, A.Blazhev, A.Dewald, M.Djongolov, A.Esmaylzadeh, C.Fransen, K.A.Gladnishki, A.Goldkuhle, C.Henrich, I.Homm, K.E.Ide, P.R.John, R.Kern, J.Kleemann, Th.Kroll, C.Muller-Gatermann, M.Scheck, P.Spagnoletti, M.Stoyanova, K.Stoychev, V.Werner, A.Yaneva, S.S.Dimitrova, G.De Gregorio, H.Naidja, A.Gargano

Microscopic structure of the one-phonon 2+ states of 208Po

NUCLEAR REACTIONS 204Pb(12C, 8Be)208Po, E=62 MeV; measured Eγ, Iγ, (particle)γ-coin, half-lives of the first 2+ and 4+ levels by recoil-distance Doppler-shift (RDDS) method using the Cologne plunger device at the FN Tandem facility of the University of Cologne. 208Po; deduced levels, J, π, B(E2). Comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 208Po; calculated levels, J, π, B(E2), B(M1), magnetic dipole and electric quadrupole moments using large-scale shell-model calculations with an effective interaction derived from the realistic CD-Bonn nucleon-nucleon potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.024311
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2021KL03      Phys.Rev. C 104, 034310 (2021)

H.Kleis, M.Seidlitz, A.Blazhev, L.Kaya, P.Reiter, K.Arnswald, A.Dewald, M.Droste, C.Fransen, O.Moller, N.Shimizu, Y.Tsunoda, Y.Utsuno, P.von Brentano, K.O.Zell

Lifetime measurements of excited states in 55Cr

NUCLEAR REACTIONS 48Ca(11B, 3np)55Cr, E=32 MeV; measured Eγ, Iγ, level T1/2 by recoil-distance Doppler shift (RDDS) method using Cologne plunger device surrounded by a cluster of seven HPGe crystals and five single HPGe detectors. 55Cr; deduced levels, J, π, B(M1), B(E2). Comparison with shell-model calculations, with previous results for level half-lives, and systematics of N=31 isotones.

NUCLEAR STRUCTURE 53Ti, 55Cr, 57Fe, 59Ni, 61Zn; calculated levels, J, π, B(M1), B(E2), dominant neutron configurations for N=31 isotones using shell model, KB3G, FPD6, GXPF1A, and GXPF1Br interactions, and KSHELL, NUSHELLX@MSU computer codes. Comparison with experimental values.

doi: 10.1103/PhysRevC.104.034310
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2021SC06      Phys.Rev. C 103, 024312 (2021)

R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, D.Bemmerer, N.Benouaret, R.Beyer, M.Butterling, F.Fiedler, S.W.Finch, C.Fransen, U.Friman-Gayer, A.Frotscher, R.Gonzalez, M.Grieger, A.Hartmann, T.Hensel, E.Hoemann, H.Hoffmann, R.V.F.Janssens, S.Johnson, M.D.Jones, A.R.Junghans, N.Kelly, J.Kleemann, Krishichayan, D.R.Little, F.Ludwig, S.E.Muller, D.O'Donnell, O.Papst, E.Pirovano, J.Sinclair, M.P.Takacs, S.Turkat, S.Urlass, A.Wagner, V.Werner, O.Wieland, J.Wilhelmy

Electric and magnetic dipole strength in 66Zn

NUCLEAR REACTIONS 66Zn(γ, γ'), (polarized γ, γ'), E=7.5, 13.4, MeV unpolarized bremsstrahlung from γELBE facility, and E=4.3, 4.4, 4.55, 4.7, 4.85, 5.0, 5.15, 5.3, 5.45, 5.6, 5.75, 5.9, 6.1, 6.3, 6.5, 6.7, 6.9, 7.1, 7.3, 7.5, 7.7, 7.9, 8.15, 8.4, 8.65, 8.9, 9.15, 9.4, 9.65, 9.9 MeV quasimonoenergetic and linearly polarized photon beams from HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization) using four escape-suppressed HPGe detectors at γELBE and using two HPGe detectors at HIγS. 66Zn; deduced 128 J=1 levels up to 11.02 MeV excitation, pygmy dipole resonances (PDR), J, π, energy-integrated scattering σ, Γ02/Γ, photoabsorption σ, photon strength functions, B(M1). Comparison of measured photoabsorption cross sections with experimental values in 54Fe(γ, γ'), and with calculations using TALYS code as in the 2019 library, and from the three Lorentz functions (TLO). Comparison of B(M1) strengths with shell-model calculations using the jj44c Hamiltonian. Comparison of deduced photon strength functions with those from 64Ni(p, p'γ).

doi: 10.1103/PhysRevC.103.024312
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2021SI26      Phys.Rev. C 104, 034320 (2021)

M.Siciliano, J.J.Valiente-Dobon, A.Goasduff, T.R.Rodriguez, D.Bazzacco, G.Benzoni, T.Braunroth, N.Cieplicka-Orynczak, E.Clement, F.C.L.Crespi, G.de France, M.Doncel, S.Erturk, C.Fransen, A.Gadea, G.Georgiev, A.Goldkuhle, U.Jakobsson, G.Jaworski, P.R.John, I.Kuti, A.Lemasson, H.Li, A.Lopez-Martens, T.Marchi, D.Mengoni, C.Michelagnoli, T.Mijatovic, C.Muller-Gatermann, D.R.Napoli, J.Nyberg, M.Palacz, R.M.Perez-Vidal, B.Saygi, D.Sohler, S.Szilner, D.Testov

Lifetime measurements in the even-even 102-108Cd isotopes

NUCLEAR REACTIONS 92Mo(106Cd, 106Cd'), E=770 MeV; measured Eγ, Iγ, γγ-coin, level T1/2 by recoil-distance Doppler-shift (RDDS) method using the AGATA γ-ray spectrometer, VAMOS++ magnetic spectrometer, and Cologne plunger device at the GANIL facility. 102,104,106,108Cd; deduced levels, J, π, B(E2), B(M1). Comparison with beyond-mean-field calculations, and with previous experimental results for level half-lives. Systematics of the experimental B(E2) values for the first 2+ states in even-mass Cd and Sn isotopes.

NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120,122,124,126,128,130Cd; calculated energies and B(E2) of the first 2+ and 4+ states, potential energy surfaces (PES) in (β2, γ) plane using particle-number variation-after-projection (PNVAP) method, and collective wave functions (CWFs) contours for the first 2+ and 4+ states in (β2, γ) plane. 106Cd; calculated levels, J, π, collective wave functions (CWFs) contours in (β2, γ) plane. State-of-the-art beyond mean-field calculations using the symmetry-conserving configuration-mixing (SCCM) approach, and Gogny-D1S interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.034320
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2021ZI01      Phys.Rev. C 104, L041301 (2021)

S.Ziliani, M.Ciemala, F.C.L.Crespi, S.Leoni, B.Fornal, T.Suzuki, T.Otsuka, A.Maj, P.Bednarczyk, G.Benzoni, A.Bracco, C.Boiano, S.Bottoni, S.Brambilla, M.Bast, M.Beckers, T.Braunroth, F.Camera, N.Cieplicka-Orynczak, E.Clement, S.Coelli, O.Dorvaux, S.Erturk, G.de France, C.Fransen, A.Goldkuhle, J.Grebosz, M.N.Harakeh, L.W.Iskra, B.Jacquot, A.Karpov, M.Kicinska-Habior, Y.Kim, M.Kmiecik, A.Lemasson, S.M.Lenzi, M.Lewitowicz, H.Li, I.Matea, K.Mazurek, C.Michelagnoli, M.Matejska-Minda, B.Million, C.Muller-Gatermann, V.Nanal, P.Napiorkowski, D.R.Napoli, R.Palit, M.Rejmund, Ch.Schmitt, M.Stanoiu, I.Stefan, E.Vardaci, B.Wasilewska, O.Wieland, M.Zieblinski, M.Zielinska

Complete set of bound negative-parity states in the neutron-rich nucleus 18N

NUCLEAR REACTIONS 181Ta(18O, X)18N, E=126 MeV; measured reaction products, A/Q versus ion charge Q identification plot using VAMOS++ spectrometer at GANIL accelerator facility, Doppler-corrected Eγ, Iγ, γγ-coin using the γ-tracking array AGATA. 18N; deduced levels, J, π, configurations. Comparison with shell-model calculations using YSOX interactions, and with previous experimental data.

NUCLEAR STRUCTURE 16,18N; calculated levels, J, π using shell-model with YSOX interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.L041301
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2020AR16      Phys.Rev. C 102, 054302 (2020)

K.Arnswald, P.Reiter, A.Blazhev, T.Braunroth, A.Dewald, M.Droste, C.Fransen, A.Goldkuhle, R.Hetzenegger, R.Hirsch, E.Hoemann, L.Kaya, L.Lewandowski, C.Muller-Gatermann, P.Petkov, D.Rosiak, M.Seidlitz, B.Siebeck, A.Vogt, D.Werner, K.Wolf, K.-O.Zell

Lifetime measurements in 44Ti

NUCLEAR REACTIONS 40Ca(6Li, np)44Ti, E=20 MeV; measured Eγ, Iγ, γγ(t), half-lives of the first 4+, 6+, 3- and 4- states by Doppler-shift attenuation method (DSAM), recoil distance Doppler-shift (RDDS) technique and the differential decay-curve method (DDCM) using an array of twelve HPGe detectors and Cologne coincidence plunger at the FN tandem accelerator of University of Cologne. 44Ti; deduced levels, J, π, B(E2), B(E1), B(M1), configurations. Comparison with previous experimental results, and with large-scale shell-model calculations using GXPF1A, KB3G, FPD6, and ZBM2M interactions.

doi: 10.1103/PhysRevC.102.054302
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2020BA02      Nucl.Instrum.Methods Phys.Res. A950, 162965 (2020)

L.Barber, D.M.Cullen, M.M.Giles, B.S.Nara Singh, M.J.Mallaburn, M.Beckers, A.Blazhev, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, J.Jolie, F.Mammes, C.Muller-Gatermann, D.Wolk, K.O.Zell

Performing the differential decay curve method on γ-ray transitions with unresolved Doppler-shifted components

NUCLEAR REACTIONS 40Ca(12C, X)50Mn, E=30.5 MeV; measured reaction products, Eγ, Iγ; deduced T1/2 for the yrast 2+ state. Unresolved Doppler-shifted components method (UDCM).

doi: 10.1016/j.nima.2019.162965
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2020BE15      Phys.Rev. C 102, 014324 (2020)

M.Beckers, C.Muller-Gatermann, A.Blazhev, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, L.Kornwebel, J.Litzinger, F.von Spee, K.-O.Zell

Lifetime measurement of excited states in 144Ce: Enhanced E1 strengths in a candidate for octupole deformation

NUCLEAR REACTIONS 142Ce(18O, 16O), E=67 MeV; measured Eγ, Iγ, (16O)γ-coin, half-lives of the first 2+, 3-, 4+ and 6+, and second 4+ states by recoil-distance Doppler-shift method at the Cologne FN Tandem accelerator. 144Ce; deduced levels, J, π, B(E1), B(E2), enhanced E1 strengths, intrinsic dipole transition moment D0, octupole deformation. Comparison with shell model predictions, and with B(E2) in 142Ba. Systematics of B(E2) values for the first 2+ states for N=82-92, Ce, Ba, and Nd isotopes.

doi: 10.1103/PhysRevC.102.014324
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2020CI02      Phys.Rev. C 101, 021303 (2020)

M.Ciemala, S.Ziliani, F.C.L.Crespi, S.Leoni, B.Fornal, A.Maj, P.Bednarczyk, G.Benzoni, A.Bracco, C.Boiano, S.Bottoni, S.Brambilla, M.Bast, M.Beckers, T.Braunroth, F.Camera, N.Cieplicka-Orynczak, E.Clement, S.Coelli, O.Dorvaux, S.Erturk, G.de France, C.Fransen, A.Goldkuhle, J.Grebosz, M.N.Harakeh, L.W.Iskra, B.Jacquot, A.Karpov, M.Kicinska-Habior, Y.Kim, M.Kmiecik, A.Lemasson, S.M.Lenzi, M.Lewitowicz, H.Li, I.Matea, K.Mazurek, C.Michelagnoli, M.Matejska-Minda, B.Million, C.Muller-Gatermann, V.Nanal, P.Napiorkowski, D.R.Napoli, R.Palit, M.Rejmund, Ch.Schmitt, M.Stanoiu, I.Stefan, E.Vardaci, B.Wasilewska, O.Wieland, M.Zieblinski, M.Zielinska, A.Atac, D.Barrientos, B.Birkenbach, A.J.Boston, B.Cederwall, L.Charles, J.Collado, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Dudouet, J.Eberth, V.Gonzalez, J.Goupil, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, W.Korten, M.Labiche, A.Lefevre, R.Menegazzo, D.Mengoni, J.Nyberg, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, O.Stezowski, Ch.Theisen, J.J.Valiente-Dobon, J.D.Holt, J.Menendez, A.Schwenk, J.Simonis

Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2+ state in 16C and 20O

NUCLEAR REACTIONS 181Ta(18O, X)16C/19O/20O, E=7.0 MeV/nucleon; measured reaction products, Eγ, Iγ, (particle)γ-coin, level half-lives by Doppler-shift attenuation method and Monte Carlo simulations using AGATA array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer at GANIL. 16C, 19,20O; deduced levels, J, π. Comparison with predictions of the valence-space in-medium similarity renormalization group (VS-IMSRG) and the no-core shell model (NCSM) with NN and 3N interactions.

doi: 10.1103/PhysRevC.101.021303
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2020CO11      Phys.Rev. C 102, 054609 (2020)

P.Colovic, S.Szilner, A.Illana, J.J.Valiente-Dobon, L.Corradi, G.Pollarolo, T.Mijatovic, A.Goasduff, G.Benzoni, M.J.G.Borge, A.Boso, A.Boukhari, S.Ceruti, J.G.Cubiss, G.de Angelis, H.De Witte, E.Fioretto, Ch.Fransen, F.Galtarossa, L.P.Gaffney, E.Giannopoulos, H.Hess, M.L.Jurado-Gomez, L.Kaya, Th.Kroll, T.Marchi, R.Menegazzo, D.Mengoni, D.R.Napoli, G.O'Neill, J.Pakarinen, Zs.Podolyak, F.Recchia, P.Reiter, D.Rosiak, J.Snall, P.Spagnoletti, D.Testov, S.Thiel, N.Warr, R.Zidarova

Population of lead isotopes in binary reactions using a 94Rb radioactive beam

NUCLEAR REACTIONS 208Pb(94Rb, X)207Pb/208Pb/209Pb/210Pb, E=6.2 MeV/nucleon, [secondary 94Rb beam from U(p, X), E=1.4 GeV, followed by mass separation of fragments by the general purpose separator, injection in Penning Trap and acceleration using REX]; measured Eγ, Iγ, (Rb-like fragments)γ-coin, σ(θ) of 3- state in 208Pb using MINIBALL cluster array and a particle detector at the HIE-ISOLDE-CERN facility; deduced total σ for neutron transfer channels, and compared with theoretical calculations using GRAZING code. 207,208,209,210Pb; deduced levels, J, π, γ transitions.

doi: 10.1103/PhysRevC.102.054609
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2020GO14      Phys.Rev. C 102, 054334 (2020)

A.Goldkuhle, A.Blazhev, C.Fransen, A.Dewald, M.Beckers, B.Birkenbach, T.Braunroth, E.Clement, J.Dudouet, J.Eberth, H.Hess, B.Jacquot, J.Jolie, Y.-H.Kim, A.Lemasson, S.M.Lenzi, H.J.Li, J.Litzinger, C.Michelagnoli, C.Muller-Gatermann, B.S.Nara Singh, R.M.Perez-Vidal, D.Ralet, P.Reiter, A.Vogt, N.Warr, K.O.Zell

Lifetime measurements of excited states in neutron-rich 53Ti: Benchmarking effective shell-model interactions

NUCLEAR REACTIONS 50Ti(238U, X)53Ti, E=1608.9 MeV; measured reaction products using VAMOS++ spectrometer at GANIL, Eγ, Iγ, (particle)γ-coin, half-lives of levels by recoil-distance Doppler shift (RDDS) and differential decay Curve method (DDCM) using AGATA array of 29, 36-fold segmented HPGe crystals. 53Ti; deduced levels, J, π, B(M1), B(E2), configurations. Comparison with shell-model calculations using interactions in the fp shell, and with previous available experimental data.

NUCLEAR STRUCTURE 53Ti; calculated levels, J, π, neutron configurations of selected states, B(M1), B(E2) using shell-model and KB3G, GXPF1A, GXPF1B, and FPD6 interactions in the fp shell. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.054334
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2020KA63      Phys.Rev. C 102, 064314 (2020)

V.Karayonchev, J.Jolie, A.Blazhev, A.Dewald, A.Esmaylzadeh, C.Fransen, G.Hafner, L.Knafla, J.Litzinger, C.Muller-Gatermann, J.-M.Regis, K.Schomacker, A.Vogt, N.Warr, A.Leviatan, N.Gavrielov

Tests of collectivity in 98Zr by absolute transition rates

NUCLEAR REACTIONS 96Zr(18O, 16O)98Zr, E=50 MeV; measured recoiling light fragments using an array of six solar cells, Eγ, Iγ, (particle)γ-coin, level half-lives by Doppler-shift recoil-distance (RDDS) method and analysis by differential decay curve method (DDCM) using an array of 11 HPGe detectors and Cologne Plunger device at the Cologne 10 MV FN Tandem accelerator. 98Zr; deduced levels, J, π, B(E2). Comparison with Monte Carlo shell model (MCSM), and interacting boson model with configuration mixing (IBM-CM) calculations, and with previous experimental data. Systematics of energies and B(E2) values of the first 2+ states in 90,92,94,96,98,100Sr, 92,94,96,98,100,102,104,106Zr.

doi: 10.1103/PhysRevC.102.064314
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2020KE07      Phys.Rev. C 102, 041304 (2020)

R.Kern, R.Zidarova, N.Pietralla, G.Rainovski, R.Stegmann, A.Blazhev, A.Boukhari, J.Cederkall, J.G.Cubiss, M.Djongolov, C.Fransen, L.P.Gaffney, K.Gladnishki, E.Giannopoulos, H.Hess, J.Jolie, V.Karayonchev, L.Kaya, J.M.Keatings, D.Kocheva, Th.Kroll, O.Moller, G.G.O'Neill, J.Pakarinen, P.Reiter, D.Rosiak, M.Scheck, J.Snall, P.-A.Soderstrom, P.Spagnoletti, M.Stoyanova, S.Thiel, A.Vogt, N.Warr, A.Welker, V.Werner, J.Wiederhold, H.De Witte

Restoring the valence-shell stabilization in 140Nd

NUCLEAR REACTIONS 208Pb(140Nd, 140Nd'), E=4.62 MeV/nucleon, [140Nd beam from Ta(p, X), E=1.4 GeV at HIE-ISOLDE-CERN, and isotopic selection by RILIS and REXEBIS]; measured Eγ, Iγ, scattered particles, (particle)γ- and (particle)γγ-coin using Miniball array and double-sided silicon strip detector (DSSD). 140Nd; deduced levels, J, π, Coulomb excitation cross sections, B(E2), B(E3), B(M1) by analyzing data using multistep Coulomb-excitation least-squares fitting code GOSIA, identification of the third 2+ state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state, and degree of F-spin mixing. Systematics of B(M1) strengths for N=80 isotones of 132Te, 134Xe, 136Ba, 138Ce and 140Nd, and compared with theoretical predictions.

doi: 10.1103/PhysRevC.102.041304
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2020KN03      Phys.Rev. C 102, 044310 (2020)

L.Knafla, G.Hafner, J.Jolie, J.-M.Regis, V.Karayonchev, A.Blazhev, A.Esmaylzadeh, C.Fransen, A.Goldkuhle, S.Herb, C.Muller-Gatermann, N.Warr, K.O.Zell

Lifetime measurements of 162Er: Evolution of collectivity in the rare-earth region

NUCLEAR REACTIONS 154Sm(12C, 4n)162Er, E=62 MeV; measured Eγ, Iγ, γγ-coin, half-life of 7(-) isomer by γ(t), level half-lives by γγ(t) fast-timing technique using the HORUS spectrometer with eight HPGe detectors and eight LaBr3(Ce) scintillation detectors at the 10 MV FN-Tandem accelerator of the University of Cologne. 162Er; deduced levels, J, π, B(E2). Comparison with confined β soft model and the interacting boson model calculations. Systematics of B(E2) values transition quadrupole moments and β2 deformation parameters for 158,160,162,164,166,168,170Er.

doi: 10.1103/PhysRevC.102.044310
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2020MO35      Phys.Rev. C 102, 054304 (2020)

L.Morrison, K.Hadynska-Klek, Zs.Podolyak, D.T.Doherty, L.P.Gaffney, L.Kaya, L.Prochniak, J.Samorajczyk-Pysk, J.Srebrny, T.Berry, A.Boukhari, M.Brunet, R.Canavan, R.Catherall, S.J.Colosimo, J.G.Cubiss, H.De Witte, Ch.Fransen, E.Giannopoulos, H.Hess, T.Kroll, N.Lalovic, B.Marsh, Y.Martinez Palenzuela, P.J.Napiorkowski, G.O'Neill, J.Pakarinen, J.P.Ramos, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, M.Rudigier, M.Siciliano, J.Snall, P.Spagnoletti, S.Thiel, N.Warr, F.Wenander, R.Zidarova, M.Zielinska

Quadrupole deformation of 130Xe measured in a Coulomb-excitation experiment

NUCLEAR REACTIONS 94Mo(130Xe, 130Xe'), E=4.195 MeV/nucleon from HIE-ISOLDE-CERN linear accelerator; measured projectile-and target-like particles using a segmented double-sided silicon strip detector (DSSSD), Eγ, Iγ, γ(θ) (particle)γ- and (particle)(particle)γ-coin using Miniball array of 23 HPGe detectors. Measured Coulomb excitation yields analyzed using GOSIA least-squares fitting code. 130Xe; deduced levels, J, π, E2 and M1 matrix elements, B(E2), B(M1), spectroscopic quadrupole moments (Q) for the first 2+ and 4+ states and second 2+ state, and shape parameters for the 0+ ground state. Comparison with previous experimental data, and with several theoretical model calculations.

NUCLEAR STRUCTURE 130Xe; calculated levels, J, π using general Bohr Hamiltonian with the mean-field theory and Universal Nuclear Energy Density Functional (UNEDF0), shell-model with the GCN50:82 and SN100PN interactions, Davydov-Filippov and γ-soft phenomenological models; calculated quadrupole shape invariants for 0+ ground state and the first 2+ state using general Bohr Hamiltonian (GBH) model. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.054304
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2020MU17      Phys.Rev. C 102, 064318 (2020)

C.Muller-Gatermann, A.Dewald, C.Fransen, M.Beckers, A.Blazhev, T.Braunroth, A.Goldkuhle, J.Jolie, L.Kornwebel, W.Reviol, F.von Spee, K.O.Zell

Evolution of collectivity in 118Xe

NUCLEAR REACTIONS 102Pd(19F, 2np)118Xe, E=73 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) and differential decay-curve method (DDCM) using an array of 11 HPGe detectors and Cologne Coincidence Plunger at the Cologne FN-tandem accelerator. 118Xe; deduced levels, J, π, B(E2). Comparison with theoretical calculations using IBM1 with the ECQF Hamiltonian, and with previous experimental results. Systematics of B(E2) values for the first 2+ and 4+ states for 104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn, 108,110,112,114,116,118,120,122,124,126,128,130,132,134Te, 114,116,118,120,122,124,126,128,130,132,134,136Xe.

doi: 10.1103/PhysRevC.102.064318
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2020SI09      Eur.Phys.J. A 56, 105 (2020)

J.Sinclair, M.Scheck, S.W.Finch, Krishichayan, U.Friman-Gayer, W.Tornow, G.Battaglia, T.Beck, R.Chapman, M.M.R.Chishti, Ch.Fransen, R.Gonzales, E.Hoemann, J.Isaak, R.V.F.Janssens, D.A.Jaroszynski, S.Johnson, M.D.Jones, J.M.Keatings, N.Kelly, J.Kleemann, D.Little, B.Loher, K.R.Mashtakov, M.Muscher, D.O'Donnell, O.Papst, E.E.Peters, D.Savran, M.Schilling, R.Schwengner, P.Spagnoletti, M.Spieker, V.Werner, J.Wilhelmy, O.Wieland, S.W.Yates, A.Zilges

Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

doi: 10.1140/epja/s10050-020-00118-8
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2020SI10      Phys.Lett. B 806, 135474 (2020)

M.Siciliano, J.J.Valiente-Dobon, A.Goasduff, F.Nowacki, A.P.Zuker, D.Bazzacco, A.Lopez-Martens, E.Clement, G.Benzoni, T.Braunroth, F.C.L.Crespi, N.Cieplicka-Orynczak, M.Doncel, S.Erturk, G.de France, C.Fransen, A.Gadea, G.Georgiev, A.Goldkuhle, U.Jakobsson, G.Jaworski, P.R.John, I.Kuti, A.Lemasson, T.Marchi, D.Mengoni, C.Michelagnoli, T.Mijatovic, C.Muller-Gatermann, D.R.Napoli, J.Nyberg, M.Palacz, R.M.Perez-Vidal, B.Saygi, D.Sohler, S.Szilner, D.Testov, M.Zielinska, D.Barrientos, B.Birkenbach, H.C.Boston, A.J.Boston, B.Cederwall, J.Collado, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Dudouet, J.Eberth, F.J.Egea Canet, V.Gonzalez, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, W.Korten, M.Labiche, A.Lefevre, S.Leoni, H.Li, A.Maj, R.Menegazzo, B.Million, A.Pullia, F.Recchia, P.Reiter, M.D.Salsac, E.Sanchis, O.Stezowski, Ch.Theisen

Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106, 108Sn

NUCLEAR REACTIONS 92Mo(106Cd, X)106Sn/108Sn, E=770 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, lifetimes, B(E2), B(E4). Differential plunger device.

doi: 10.1016/j.physletb.2020.135474
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2020ST02      Eur.Phys.J. A 56, 22 (2020)

K.Stahl, A.Wendt, P.Reiter, D.Rudolph, A.Blazhev, B.Bruyneel, J.Eberth, C.Fahlander, C.Fransen, P.Golubev, H.Hess, R.Hoischen, A.Holler, M.Kalkuhler, T.Kotthaus, D.Lersch, G.Pascovici, M.Seidlitz, B.Siebeck, J.Taprogge, N.Warr, A.Wiens, O.Zell

Search for proton emission of the isomeric 10+ state in 54Ni

doi: 10.1140/epja/s10050-020-00029-8
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2020YA24      Eur.Phys.J. A 56, 246 (2020)

A.Yaneva, D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Dewald, M.Djongolov, C.Fransen, K.A.Gladnishki, C.Henrich, I.Homm, K.E.Ide, P.R.John, D.Kalaydjieva, V.Karayonchev, R.Kern, J.Kleemann, Th.Kroll, C.Muller-Gatermann, M.Scheck, P.Spagnoletti, M.Stoyanova, V.Werner

Experimental evidence for low-lying quadrupole isovector excitation of 208Po

NUCLEAR REACTIONS 204Pb(12C, 8Be), E=62 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin. 208Po; deduced γ-ray energies and intensities, level lifetimes, B(E2), B(M1) using the Doppler-shift attenuation method.

doi: 10.1140/epja/s10050-020-00259-w
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2019GI07      Phys.Rev. C 99, 044317 (2019), Erratum Phys.Rev. C 104, 029901 (2021)

M.M.Giles, B.S.Nara Singh, L.Barber, D.M.Cullen, M.J.Mallaburn, M.Beckers, A.Blazhev, T.Braunroth, A.Dewald, C.Fransen, A.Goldkuhle, J.Jolie, F.Mammes, C.Muller-Gatermann, D.Wolk, K.O.Zell, S.M.Lenzi, A.Poves

Probing isospin symmetry in the (50Fe, 50Mn, 50Cr) isobaric triplet via electromagnetic transition rates

NUCLEAR REACTIONS 40Ca(12C, pn), (12C, 2p), E=30-36 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by recoil distance Doppler-shift (RDDS) technique using an array of 11 HPGe detectors, and Cologne plunger device at the University of Cologne. 50Mn, 50Cr; deduced levels, J, π, E2 matrix elements, B(E2) values for T=1 isobar analog states in 50Fe, 50Mn, and 50Cr. Comparison with shell model calculations using the GXPF1A and KB3GR interactions, and with previous experimental results. 50Fe; pointed out need for a more precise value of B(E2) for the first 2+ state.

doi: 10.1103/PhysRevC.99.044317
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2019GO13      Eur.Phys.J. A 55, 53 (2019)

A.Goldkuhle, C.Fransen, A.Dewald, K.Arnswald, M.Bast, M.Beckers, A.Blazhev, T.Braunroth, G.Hackenberg, G.Hafner, J.Litzinger, J.Jolie, C.Muller-Gatermann, F.von Spee, N.Warr, D.Werner, K.O.Zell

Lifetime measurement of excited states in 46Ti

NUCLEAR REACTIONS 40Ca(9Be, 2pn)46Ti, E=33 MeV; measured Eγ, Iγ, γγ-coin; 46Ti; deduced yrast 2+1, 4+1, 6+1 states T1/2, upper T1/2 limit of the 8+1 state using Recoil Distance Doppler Shift (RDDS) method and γγ-coin using Differential Decay Curve Method (DDCM), γ-transition probabilities of the first yrast states.

doi: 10.1140/epja/i2019-12722-6
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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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2019KA13      Phys.Rev. C 99, 024326 (2019)

V.Karayonchev, A.Blazhev, A.Esmaylzadeh, J.Jolie, M.Dannhoff, F.Diel, F.Dunkel, C.Fransen, L.M.Gerhard, R.-B.Gerst, L.Knafla, L.Kornwebel, C.Muller-Gatermann, J.-M.Regis, N.Warr, K.O.Zell, M.Stoyanova, P.Van Isacker

Lifetimes in 211At and their implications for the nuclear structure above 208Pb

NUCLEAR REACTIONS 208Pb(6Li, 3n), E=34 MeV; measured Eγ, Iγ, γγ-coin, half-lives of 13/2-, 17/2- and 23/2- levels in 211At by γγ-coin fast timing technique using HPGe detectors and LaBr3(Ce) scintillators for γ-rays at the Institute for Nuclear Physics, University of Cologne. 211At; deduced levels, B(M1), B(E2). Comparison with shell model calculations, and previous experimental values.

NUCLEAR STRUCTURE 209Bi, 210Po, 211At; calculated B(E2), magnetic dipole moments, B(M1) using two shell-model calculations: semiempirical interaction for three particles in a single j=9/2 shell, and the modified Kuo-Herling interaction in a multi-j model space. Comparison with experimental values.

doi: 10.1103/PhysRevC.99.024326
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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: 126,128,130,132,134,136,138Ba.

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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2019MU08      Phys.Rev. C 99, 054325 (2019)

C.Muller-Gatermann, A.Dewald, C.Fransen, K.Auranen, H.Badran, M.Beckers, A.Blazhev, T.Braunroth, D.M.Cullen, G.Fruet, A.Goldkuhle, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, D.Jenkins, J.Jolie, R.Julin, S.Juutinen, J.Konki, M.Leino, J.Litzinger, K.Nomura, J.Pakarinen, P.Peura, M.G.Procter, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, J.Uusitalo, K.O.Zell

Shape coexistence in 178Hg

NUCLEAR REACTIONS 103Rh(78Kr, 2np), E=354 MeV; measured Eγ, Iγ, Eα, (recoil)γ- and αγ-coin, half-lives of levels in the yrast band by recoil-distance Doppler-shift method (RDDS) using RITU separator, JUROGAM II array, GREAT spectrometer and DPUNS plunger at the K-130 cyclotron facility of the University of Jyvaskyla. Recoil-decay tagging method. 178Hg; deduced high-spin levels, J, π, B(E2), transition quadrupole moments, quadrupole deformation parameter β2 and configuration-mixing features. Comparison with predictions of interacting boson model, mean-field model, and total routhian surface (TRS) calculations. Systematics of energy levels in A=172-204, even-A Hg isotopes. Systematics of transition quadrupole moments and kinetic moments of inertia for yrast states in 178,180,182,184Hg.

RADIOACTIVITY 174,175,176Pt, 177,178,179Au, 177,178,179Hg(α)[from 103Rh(78Kr, X), E=354 MeV]; measured Eα correlated with ions.

doi: 10.1103/PhysRevC.99.054325
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2019MU13      Nucl.Instrum.Methods Phys.Res. A920, 95 (2019)

C.Muller-Gatermann, F.von Spee, A.Goasduff, D.Bazzacco, M.Beckers, T.Braunroth, A.Boso, P.Cocconi, G.de Angelis, A.Dewald, C.Fransen, A.Goldkuhle, A.Gottardo, A.Gozzelino, K.Hadynska-Klek, G.Jawroski, P.R.John, J.Jolie, S.M.Lenzi, J.Litzinger, R.Menegazzo, D.Mengoni, D.R.Napoli, F.Recchia, M.Siciliano, D.Testov, S.Thiel, J.J.Valiente-Dobon, K.O.Zell

A new dedicated plunger device for the GALILEO γ-ray detector array

NUCLEAR REACTIONS 154Sm(32S, 6n)180Pt, E=183 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, 6+ and 8+ levels T1/2.

doi: 10.1016/j.nima.2018.12.077
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2019PE14      Phys.Rev. C 100, 024312 (2019)

P.Petkov, C.Muller-Gatermann, D.Werner, A.Dewald, A.Blazhev, C.Fransen, J.Jolie, S.Ohkubo, K.O.Zell

New lifetime measurements for the lowest quadrupole states in 20, 22Ne and possible explanations of the high collectivity of the depopulating E2 transitions

NUCLEAR REACTIONS 9Be, Mg(16O, X)20Ne, E=30, 33, 36, 38 MeV; 9Be, Mg(18O, X)22Ne, E=33 MeV; measured Eγ, Iγ, γγ-coin, stopping powers, level half-lives by DSAM and line-shape analysis using an array of twelve HPGe detectors, and Cologne coincidence plunger set up at the tandem accelerator of the University of Cologne. 20,22Ne; deduced levels, B(E2). Comparison with shell-model and configuration-mixing calculations, and with previous experimental data. Discussed angular momentum dependence of the B(E2) transition strengths between the yrast states.

doi: 10.1103/PhysRevC.100.024312
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2019RA28      Phys.Lett. B 797, 134797 (2019)

D.Ralet, E.Clement, G.Georgiev, A.E.Stuchbery, M.Rejmund, P.Van Isacker, G.de France, A.Lemasson, J.Ljungvall, C.Michelagnoli, A.Navin, D.L.Balabanski, L.Atanasova, A.Blazhev, G.Bocchi, R.Carroll, J.Dudouet, E.Dupont, B.Fornal, S.Franchoo, C.Fransen, C.Muller-Gatermann, A.Goasduff, A.Gadea, P.R.John, D.Kocheva, T.Konstantinopoulos, A.Korichi, A.Kusoglu, S.M.Lenzi, S.Leoni, R.Lozeva, A.Maj, R.Perez, N.Pietralla, C.Shand, O.Stezowski, D.Wilmsen, D.Yordanov, D.Barrientos, P.Bednarczyk, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, B.Cederwall, M.Ciemala, J.Collado, F.Crespi, D.Cullen, H.J.Eberth, J.Goupil, L.Harkness, H.Hess, A.Jungclaus, W.Korten, M.Labiche, R.Menegazzo, D.Mengoni, B.Million, J.Nyberg, Zs.Podolyak, A.Pullia, B.Quintana Arnes, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, C.Theisen, J.J.Valiente Dobon, O.Wieland

Evidence of octupole-phonons at high spin in 207Pb

NUCLEAR REACTIONS 100Mo(208Pb, 207Pb), E=6.25 MeV/nucleon; measured reaction products, Eγ, Iγ. 207Pb; deduced γ-ray energies, T1/2, B(E3) for 19/2- state. Recoil Distance Doppler-Shift (RDDS) method.

doi: 10.1016/j.physletb.2019.134797
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2019ST13      Phys.Rev. C 100, 064304 (2019)

M.Stoyanova, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, M.Beckers, A.Dewald, M.Djongolov, A.Esmaylzadeh, C.Fransen, L.M.Gerhard, K.A.Gladnishki, S.Herb, P.R.John, V.Karayonchev, J.M.Keatings, R.Kern, L.Knafla, D.Kocheva, L.Kornwebel, Th.Kroll, M.Ley, K.M.Mashtakov, C.Muller-Gatermann, J.-M.Regis, M.Scheck, K.Schomacker, J.Sinclair, P.Spagnoletti, C.Surder, N.Warr, V.Werner, J.Wiederhold

Lifetimes of the 4+1 states of 206Po and 204Po: A study of the transition from noncollective seniority-like mode to collectivity

NUCLEAR REACTIONS 197Au(11B, 4n)204Po, E=55 MeV; 198Pt(12C, 4n)206Po, E=65 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by γγ(t) fast timing technique using the HORUS spectrometer of the FN Tandem facility at the University of Cologne. 204,206Po; deduced levels, J, π, B(E2) for the first 4+ states in both the isotopes, and for the first 2+ in 204Po, configurations; discussed transition from single-particle seniority like mode to collective mode. Comparison with two-state mixing calculations. Systematics of energies, R4/2 ratios, B(E2) and magnetic moments for the yrast levels in 200,202,204,206,208,210Po.

doi: 10.1103/PhysRevC.100.064304
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2019WR01      Eur.Phys.J. A 55, 130 (2019)

K.Wrzosek-Lipska, K.Rezynkina, N.Bree, M.Zielinska, L.P.Gaffney, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.N.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, A.Wiens, J.L.Wood

Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

NUCLEAR REACTIONS 112Cd(182Hg, 182Hg'), E=519 MeV; 120Sn, 107Ag, 112Cd(184Hg, 184Hg'), E=524 MeV; 120Sn, 107Ag, 114Cd(186Hg, 186Hg'), E=530 MeV; 120Sn, 107Ag, 114Cd(188Hg, 188Hg'), E=536 MeV; measured reaction products, Eγ, Iγ, X-rays. 182,184,186,188Hg; deduced γ-ray energies, J, π, transition E2 and M1 reduced matrix elements, branching ratios, B(E2). Comparison with theoretical calculations, GOSIA analysis. The Miniball set-up, REX postaccelerator.

doi: 10.1140/epja/i2019-12815-2
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2018ES04      Phys.Rev. C 98, 014313 (2018)

A.Esmaylzadeh, L.M.Gerhard, V.Karayonchev, J.-M.Regis, J.Jolie, M.Bast, A.Blazhev, T.Braunroth, M.Dannhoff, F.Dunkel, C.Fransen, G.Hafner, L.Knafla, M.Ley, C.Muller-Gatermann, K.Schomacker, N.Warr, K.-O.Zell

Lifetime determination in 190, 192, 194, 196Hg via γ-γ fast-timing spectroscopy

NUCLEAR REACTIONS 178Hf(16O, 4n)190Hg, E=87 MeV; 184W(12C, 4n)192Hg, E=66 MeV; 186W(12C, 4n)194Hg, E=64 MeV; 197Au(p, 2n)196Hg, E=17 MeV; measured Eγ, Iγ, level half-lives of first 2+ and 4+ states in 190,192,194,196Hg, first 7- in 192Hg, first 9- in 194Hg and first 5- in 196Hg by γγ-coin fast-timing technique using HORUS array and LaBr3(Ce) detectors at the Cologne University Institute of Nuclear Physics 190,192,194,196Hg; deduced levels, J, π, B(E2), B(E1). Comparison with theoretical calculations using interacting boson model configuration mixing (IBM-CM), and interacting boson model-2 (IBM-2). Systematics of excitation energies of yrast states, E(first 4+)/E(first 2+) ratios, and B(E2) for first 2+ and 4+ states in A=172-204 Hg isotopes.

doi: 10.1103/PhysRevC.98.014313
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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 123,125,127,129,131Xe, 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 h11/2 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 h11/2 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, 82Se and the role of the νg9/2

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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2018MU02      Phys.Rev. C 97, 024336 (2018)

C.Muller-Gatermann, A.Dewald, C.Fransen, T.Braunroth, J.Jolie, J.Litzinger, J.M.Regis, F.von Spee, N.Warr, K.O.Zell, T.Grahn, P.T.Greenlees, K.Hauschild, U.Jakobsson, R.Julin, S.Juutinen, S.Ketelhut, P.Nieminen, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, P.Petkov

Low-lying electromagnetic transition strengths in 180Pt

NUCLEAR REACTIONS 98Mo(86Kr, 4n), E=380 MeV from the K-130 cyclotron of University of Jyvaskyla; measured Eγ, Iγ, γγ-coin using JUROGAM II array, level half-lives by recoil-distance Doppler-shift method (RDDM) using DPUNS plunger, and differential decay-curve analysis. 168Yb(16O, 4n), E=88 MeV from FN tandem at University of Cologne; measured Eγ, Iγ, γγ(t), level half-lives by fast electronic timing technique using Horus cube spectrometer consisting of eight LaBr3(Ce) scintillators and eight HPGe detectors. 180Pt; deduced levels, J, π, B(E2). Comparison with predictions of interacting boson model (IBM-1) and general collective model (GCM) calculations.

doi: 10.1103/PhysRevC.97.024336
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2017AR09      Phys.Lett. B 772, 599 (2017)

K.Arnswald, T.Braunroth, M.Seidlitz, L.Coraggio, P.Reiter, B.Birkenbach, A.Blazhev, A.Dewald, C.Fransen, B.Fu, A.Gargano, H.Hess, R.Hirsch, N.Itaco, S.M.Lenzi, L.Lewandowski, J.Litzinger, C.Muller-Gatermann, M.Queiser, D.Rosiak, D.Schneiders, B.Siebeck, T.Steinbach, A.Vogt, K.Wolf, K.O.Zell

Enhanced collectivity along the N = Z line: Lifetime measurements in 44Ti, 48Cr, and 52Fe

NUCLEAR REACTIONS Mg(23Na, xnp)44Ti, 40Ca(10B, np)48Cr, 27Al(28Si, 2np)52Fe, E=62, 26, 86 MeV; measured reaction products, Eγ, Iγ. 44Ti, 48,50Cr, 52Fe; deduced γ-ray energies, level T1/2, B(E2). Recoil distance Doppler-shift method, comparison with available data.

doi: 10.1016/j.physletb.2017.07.032
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2017DI12      Phys.Rev. C 96, 044320 (2017)

F.Didierjean, D.Verney, G.Duchene, J.Litzinger, K.Sieja, A.Dewald, A.Goasduff, R.Lozeva, C.Fransen, G.de Angelis, S.Aydin, D.Bazzacco, A.Bracco, S.Bottoni, L.Corradi, F.Crespi, E.Ellinger, E.Farnea, E.Fioretto, S.Franchoo, A.Gottardo, L.Grocutt, M.Hackstein, F.Ibrahim, K.Kolos, S.Leoni, S.Lenzi, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, V.Modamio, O.Moller, G.Montagnoli, D.Montanari, A.I.Morales, D.Napoli, M.Niikura, F.Recchia, E.Sahin, F.Scarlassara, L.Sengele, S.Szilner, J.F.Smith, A.M.Stefanini, C.Ur, J.J.Valiente-Dobon, V.Vandone

Neutron effective single-particle energies above 78Ni: A hint from lifetime measurements in the N=51 isotones 85Se and 87Kr

NUCLEAR REACTIONS 238U(82Se, 85Se), (82Se, 87Kr), E=530 MeV; measured Eγ, Iγ, particle spectra, (87Kr)γ-coin, (82Se)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using Prisma spectrometer for particle detection, AGATA demonstrator array for γ detection, and Cologne plunger device for half-life measurements at LNL, Legnaro tandem-ALPI facility. 87Kr, 85Se; deduced levels, J, π, configurations. Comparison with core-coupled model and shell model calculations. 238U(82Se, X)79Se/80Se/81Se/82Se/83Se/84Se/85Se/86Se/80Kr/81Kr/82Kr/83Kr/84Kr/85Kr/86Kr/87Kr/88Kr/89Kr/90Kr/91Kr/92Kr/93Kr, E=530 MeV; measured isotopic yields. Systematics of energies of 5/2+ ground states, 1/2+, 7/2+ and 9/2+ states in N=51 isotones 83Ge, 85Se, 87Kr, 89Sr, 91Zr, 93Mo.

doi: 10.1103/PhysRevC.96.044320
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2017DU08      Nucl.Phys. A965, 13 (2017)

H.Duckwitz, P.Petkov, T.Thomas, T.Ahn, A.Blazhev, N.Cooper, C.Fransen, M.Hinton, G.Ilie, J.Jolie, V.Werner

Nuclear structure investigations of 84Sr and 86Sr using γ-ray spectroscopic methods

NUCLEAR REACTIONS 85Rb(p, 2n), E=15 MeV;87Rb(p, 2n), E=16 MeV; measured Eγ, Iγ(θ), γγ-coin using HORUS and YRAST spectrometer of 10 clover detectors. 84,86Sr deduced γ transitions, levels, J, π, branching and mixing ratio, T1/2 using DSA (Doppler Shift Attenuation) method; calculated levels, J, π transition strengths, B(E2), B(M1) using NuShellX@MSU shell model code with Honma residual interaction; deduced mixed symmetry states. Calculations compared with available data.

doi: 10.1016/j.nuclphysa.2017.05.077
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2017KA10      Phys.Rev. C 95, 034316 (2017)

V.Karayonchev, J.-M.Regis, J.Jolie, A.Blazhev, R.Altenkirch, S.Ansari, M.Dannhoff, F.Diel, A.Esmaylzadeh, C.Fransen, R.-B.Gerst, K.Moschner, C.Muller-Gatermann, N.Saed-Samii, S.Stegemann, N.Warr, K.O.Zell

Evolution of collectivity in the N=100 isotones near 170Yb

NUCLEAR REACTIONS 168Er(α, 2n), E=27 MeV; measured Eγ, Iγ, level half-lives by γγ(t) using electronic γ-γ fast-timing technique using HPGe detectors and LaBr3(Ce) detectors at Cologne 10 MV FN-Tandem accelerator. 170Yb; deduced levels, yrast band, B(E2). Comparison with confined beta soft (CBS) model calculations, X(5) predictions, and with previous experimental results. Systematics of ground state band energies and B(E2) in N=100 isotones of 168Er, 170Yb, 172Hf, 174W and 176Os.

doi: 10.1103/PhysRevC.95.034316
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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, 64Fe, 61, 63Co, 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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2017KO34      Eur.Phys.J. A 53, 175 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Astier, R.Altenkirch, S.Ansari, Th.Braunroth, M.L.Cortes, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, J.Litzinger, C.Muller-Gatermann, P.Petkov, M.Rudigier, M.Scheck, Ph.Scholz, P.Spagnoletti, M.Spieker, C.Stahl, R.Stegmann, M.Stoyanova, P.Thole, N.Warr, V.Werner, W.Witt, D.Wolk, K.O.Zell, P.Van Isacker, V.Yu.Ponomarev

A revised B(E2;2+1 → 0+1) value in the semi-magic nucleus 210Po

NUCLEAR REACTIONS 208Pb(12C, 10Be), E=62 MeV; measured Eγ, Iγ(θ), γγ-coin, (particle)γ-coin using 11 HPGe, light reaction fragments using solar cells array. 210Po; deduced 2+1 state T1/2 using the line shape of the transition, branching ratios to this state from upper states, B(E1), B(E2), B(E3), B(M1), T1/2 of three states and transitions; calculated low-lying states energy, structure, B(E1), B(E2), B(E3), B(M1) using QPM (Quasiparticle Phonon Model). Compared with data.

doi: 10.1140/epja/i2017-12367-5
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2017KO38      Phys.Rev. C 96, 044305 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, R.Altenkirch, S.Ansari, A.Astier, M.Bast, M.Beckers, Th.Braunroth, M.Cappellazzo, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Goldkuhle, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, Th.Kroll, J.Litzinger, K.Moschner, C.Muller-Gatermann, P.Petkov, M.Scheck, Ph.Scholz, T.Schmidt, P.Spagnoletti, C.Stahl, R.Stegmann, A.Stolz, A.Vogt, N.Warr, V.Werner, D.Wolk, J.C.Zamora, K.O.Zell, V.Yu.Ponomarev, P.Van Isacker

Low collectivity of the 2+1 state of 212Po

NUCLEAR REACTIONS 208Pb(12C, 8Be)212Po, E=64 MeV; measured Eγ, Iγ, (particle)γ-coin, half-life of the first 2+ state by recoil-distance Doppler-shift (RDDS) method at the FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(E2). Comparisons with levels and B(E2) of 210Po and 210Pb, and with theoretical calculations using shell model. Systematics of B(E2) values for the first 2+ states in 20Ne, 44Ti, 52Ti, 136Te, 212Po, nuclei with two valence protons and two valence neutrons.

doi: 10.1103/PhysRevC.96.044305
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2017PE01      Nucl.Phys. A957, 240 (2017)

P.Petkov, A.Dewald, O.Moller, I.Deloncle, R.Chapman, S.Pascu, D.Bucurescu, D.Tonev, M.Reese, C.Fransen, S.Y.Araddad, G.Asova, J.Copnell, N.Goutev, M.Hackstein, J.Jolie, J.C.Lisle, J.N.Mo, Th.Pissulla, W.Rother, A.G.Smith, C.Tenereiro, D.M.Thompson, K.O.Zell

On the quadrupole collectivity in the yrast band of 168Yb

NUCLEAR REACTIONS 154Sm(18O, 4n), E=80 MeV;124Sn(48Ca, 4n), E=189 MeV; measured Eγ, Iγ, γγ-coin, RDDS (Recoil distance Doppler-shift) spectra using five large volume Ge (Sm target) and 21 escape-suppressed HPGe (Sn target). 168Yb deduced T1/2, B(E2) of levels using lifetime analysis with differential decay curve method (one B(E2) deduced using published T1/2), yrast band quadrupole moments; calculated B(E2) vs spin. Yrast band moments of inertia and B(E2) compared with published values for 164,166,168,170Yb; deduced indication for reduced collectivity at low spin unexplained by available calculations.

doi: 10.1016/j.nuclphysa.2016.09.006
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2017PE14      Phys.Rev. C 96, 034326 (2017); Erratum Phys.Rev. C 98, 019904 (2018)

P.Petkov, C.Muller-Gatermann, A.Dewald, A.Blazhev, C.Fransen, J.Jolie, P.Scholz, K.O.Zell, A.Zilges

Lifetime measurements with improved precision in 30, 32S and possible influence of large-scale clustering on the appearance of strongly deformed states

NUCLEAR REACTIONS 28Si(3He, n)30S, E=8 MeV; 29Si(α, n)32S, E=9 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by Doppler-shift attenuation method (DSAM) using HORUS array of HPGe detectors at the FN Tandem accelerator facility of the University of Cologne. 30,32S; deduced levels, J, π, relative population, B(E2), B(M1). Comparison with previous experimental results for level half-lives, and with two-band mixing calculation. Systematics of low-lying quadrupole states in 28,30,32,34,36,38S. 32S; discussed electromagnetic E2 transition strengths and quadrupole moment in terms of two doubly magic 16O clusters. 80Zr; discussed superdeformed yrast band in terms of two 40Ca clusters.

doi: 10.1103/PhysRevC.96.034326
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2017QU05      Phys.Rev. C 96, 044313 (2017)

M.Queiser, A.Vogt, M.Seidlitz, P.Reiter, T.Togashi, N.Shimizu, Y.Utsuno, T.Otsuka, M.Honma, P.Petkov, K.Arnswald, R.Altenkirch, B.Birkenbach, A.Blazhev, T.Braunroth, A.Dewald, J.Eberth, C.Fransen, B.Fu, H.Hess, R.Hetzenegger, R.Hirsch, J.Jolie, V.Karayonchev, L.Kaya, L.Lewandowski, C.Muller-Gatermann, J.-M.Regis, D.Rosiak, D.Schneiders, B.Siebeck, T.Steinbach, K.Wolf, K.-O.Zell

Cross-shell excitations from the fp shell: Lifetime measurements in 61Zn

NUCLEAR REACTIONS 40Ca(24Mg, n2p), E=77 MeV; 58Ni(α, n), E=19 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), level half-lives by recoil-distance Doppler-shift (RDDS) method using Cologne plunger device and an array of 12 HPGe detectors, and by γγ(t) electronic fast timing technique using eight HPGe detectors and eight LaBr3:Ce detectors at the Tandem accelerator facility of the University of Cologne. 61Zn; deduced high-spin levels, nano-second isomers, J, π, multipolarities, mixing ratios, B(E2), B(E1), B(M1), B(M2), configurations, deformation. Comparison with shell-model calculations using jj44b, GXPF1, GXPF1A, and GXPF1Br+VMU interactions.

doi: 10.1103/PhysRevC.96.044313
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2017RA09      Phys.Scr. 92, 054004 (2017)

D.Ralet, G.Georgiev, A.E.Stuchbery, E.Cement, A.Lemasson, C.Michelagnoli, M.Rejmund, L.Atanasova, D.L.Balabanski, G.Bocchi, R.Carroll, A.Dewald, J.Dudouet, B.Fornal, G.de France, S.Franchoo, C.Fransen, C.Muller-Gatermann, A.Goasduff, A.Gadea, B.Jacquot, P.R.John, D.Kocheva, T.Konstantinopoulos, A.Korichi, A.Kusoglu, S.M.Lenzi, S.Leoni, J.Ljungvall, R.Lozeva, A.Maj, A.Navin, R.Perez, N.Pietralla, C.Shand, O.Stezowski, D.Yordanov

Toward lifetime and g factor measurements of short-lived states in the vicinity of 208Pb

NUCLEAR REACTIONS 100Mo(208Pb, X)206Pb/207Pb/208Pb, E=6.25 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies. Preliminary data for the lifetime measurements with Cologne plunger device.

doi: 10.1088/1402-4896/aa6942
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2017SA47      Phys.Rev. C 96, 021301 (2017)

B.Saygi, D.T.Joss, R.D.Page, T.Grahn, J.Simpson, D.O'Donnell, G.Alharshan, K.Auranen, T.Back, S.Boening, T.Braunroth, R.J.Carroll, B.Cederwall, D.M.Cullen, A.Dewald, M.Doncel, L.Donosa, M.C.Drummond, F.Ertugral, S.Erturk, C.Fransen, P.T.Greenlees, M.Hackstein, K.Hauschild, A.Herzan, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Labiche, A.Lopez-Martens, C.G.McPeake, F.Moradi, O.Moller, M.Mustafa, P.Nieminen, J.Pakarinen, J.Partanen, P.Peura, M.Procter, P.Rahkila, W.Rother, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo

Reduced transition probabilities along the yrast line in 166W

NUCLEAR REACTIONS 92Mo(78Kr, 4p), E=380 MeV; measured Eγ, Iγ, γγ-coin correlated with implanted recoils, level half-lives by recoil-distance and differential decay curve method (DDCM) using RITU gas-filled separator, GREAT focal-plane spectrometer, DPUNS plunger system and JURGAM-II array at Jyvaskyla accelerator facility. 166W; deduced levels, J, π, yrast band, B(E2), B(E2) ratios and compared with theoretical predictions for an axially deformed rotor. Systematics of energies and B(E2) values for the first 2+, 4+ and 6+ states in A=160-190 even-A W isotopes.

doi: 10.1103/PhysRevC.96.021301
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2017SI07      Acta Phys.Pol. B48, 331 (2017)

M.Siciliano, J.J.Valiente-Dobon, A.Goasduff, D.Bazzacco, N.Alahari, G.Benzoni, T.Braunroth, N.Cieplicka, F.C.L.Crespi, E.Clement, G.De France, M.Doncel, S.Erturk, C.Fransen, A.Gadea, G.Georgiev, A.Goldkuhle, U.Jakobsson, G.Jaworski, P.R.John, I.Kuti, A.Lemasson, A.Lopez-Martens, H.Li, S.Lunardi, T.Marchi, D.Mengoni, C.Michelagnoli, T.Mijatovic, C.Muller-Gatermann, D.R.Napoli, J.Nyberg, M.Palacz, R.M.Perez-Vidal, M.Rejmund, B.Saygi, D.Sohler, S.Szilner, D.Testov

Study of Quadrupole Correlations in N=Z=50 Region via Lifetime Measurements

NUCLEAR REACTIONS 92Mo(106Cd, x), E=770 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using AGATA γ-ray array with VAMOS++ spectrometer ; deduced Doppler-corrected γ-ray spectrum for 108Sn, γ transitions.

doi: 10.5506/APhysPolB.48.331
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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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2016BU23      Nucl.Instrum.Methods Phys.Res. A837, 1 (2016)

D.Bucurescu, I.Cata-Danil, G.Ciocan, C.Costache, D.Deleanu, R.Dima, D.Filipescu, N.Florea, D.G.Ghita, T.Glodariu, M.Ivascu, R.Lica, N.Marginean, R.Marginean, C.Mihai, A.Negret, C.R.Nita, A.Olacel, S.Pascu, T.Sava, L.Stroe, A.Serban, R.Suvaila, S.Toma, N.V.Zamfir, G.Cata-Danil, I.Gheorghe, I.O.Mitu, G.Suliman, C.A.Ur, T.Braunroth, A.Dewald, C.Fransen, A.M.Bruce, Zs.Podolyak, P.H.Regan, O.J.Roberts

The ROSPHERE γ-ray spectroscopy array

NUCLEAR REACTIONS 110Pd(13C, 4n), E=50 MeV; 82Se(13C, X)92Zr, E=42 Mev; 140Ce(13C, 3n), E=62 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, T1/2. Comparison with available data.

doi: 10.1016/j.nima.2016.08.052
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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, 98Sr: 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, 98Sr 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 90,92,94,96,98,100,102Sr. 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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2016FU09      Phys.Rev. C 94, 034318 (2016)

B.Fu, M.Seidlitz, A.Blazhev, M.Bouhelal, F.Haas, P.Reiter, K.Arnswald, B.Birkenbach, C.Fransen, G.Friessner, A.Hennig, H.Hess, R.Hirsch, L.Lewandowski, D.Schneiders, B.Siebeck, T.Steinbach, T.Thomas, A.Vogt, A.Wendt, K.Wolf, K.O.Zell

γ-ray spectroscopy of 33P and 33S after fusion-evaporation reactions

NUCLEAR REACTIONS 26Mg(13C, npα), (13C, 2nα), E=46 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) level half-lives by DSAM using HORUS array at Cologne tandem accelerator facility. 33P, 33S; deduced levels, J, π, γ-ray branching ratios, multipolarity and mixing ratios for selected γ rays in 33P. Comparison with truncated p-sd-pf shell model calculations using the PSDPF interaction.

doi: 10.1103/PhysRevC.94.034318
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2016KO03      Phys.Rev. C 93, 011303 (2016)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, C.Stahl, P.Petkov, A.Blazhev, A.Hennig, A.Astier, Th.Braunroth, M.L.Cortes, A.Dewald, M.Djongolov, C.Fransen, K.Gladnishki, V.Karayonchev, J.Litzinger, C.Muller-Gatermann, M.Scheck, Ph.Scholz, R.Stegmann, P.Thole, V.Werner, W.Witt, D.Wolk, P.Van Isacker

Low-lying isovector 2+ valence-shell excitations of 212Po

NUCLEAR REACTIONS 208Pb(12C, 2α)212Po, E=62 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin, enriched target, level half-lives by DSAM and line-shape analysis using an array of 12 HPGe detectors for γ detection, and solar cell array for reaction products at FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(M1), B(E2) of second and third 2+ states as candidates for one-phonon mixed-symmetry states (MSS). Comparison with simple single-j shell model calculation. 211Po; observed γ rays. 209,210Po, 208Pb, 209Bi; reaction products measured in coincidence with γ rays.

doi: 10.1103/PhysRevC.93.011303
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2016TH01      Nucl.Phys. A947, 203 (2016)

T.Thomas, V.Werner, J.Jolie, K.Nomura, T.Ahn, N.Cooper, H.Duckwitz, A.Fitzler, C.Fransen, A.Gade, M.Hinton, G.Ilie, K.Jessen, A.Linnemann, P.Petkov, N.Pietralla, D.Radeck

Nuclear structure of 96, 98Mo: Shape coexistence and mixed-symmetry states

NUCLEAR REACTIONS 96Zr(3He, 3n), E=18 MeV;96Zr(α, 2n), E=16 MeV;measured Eγ, Iγ(θ), γγ-coin using OSIRIS and YRAST Ball spectrometer; deduced γ angular correlations; deduced levels, J, π, branching and E2/M1 mixing ratios, B(M1), B(E2), lifetimes of discrete γ transitions using Doppler Shift Attenuation Method; calculated β, γ deformations using Skyrme energy density functional, IBM-2 configuration mixing; deduced parameters, one- and two-phonon mixed-symmetry states, shape coexistence.

doi: 10.1016/j.nuclphysa.2015.12.010
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2016UR03      Phys.Rev. C 94, 011302 (2016)

W.Urban, U.Koster, M.Jentschel, P.Mutti, B.Markisch, T.Rzaca-Urban, Ch.Bernards, Ch.Fransen, J.Jolie, T.Thomas, G.S.Simpson

Precise measurement of energies in 115Sn following the (n, γ) reaction

NUCLEAR REACTIONS 114Sn(n, γ), E=cold neutrons; measured primary and secondary Eγ, γγ-coin using eight large Ge detectors at PF1B facility of ILL-Grenoble. 115Sn; deduced levels, S(n).

RADIOACTIVITY 115In(β-); deduced precise Q(β-) for a highly-forbidden β- transition from 115In g.s. parent to a 497, 3/2+ level in 115Sn using precisely measured masses of relevant nuclides and precise energy measurement of the 497.3-keV level in 115Sn from (n, γ).

doi: 10.1103/PhysRevC.94.011302
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2016UR04      Phys.Rev. C 94, 044328 (2016)

W.Urban, K.Sieja, T.Materna, M.Czerwinski, T.Rzaca-Urban, A.Blanc, M.Jentschel, P.Mutti, U.Koster, T.Soldner, G.de France, G.S.Simpson, C.A.Ur, C.Bernards, C.Fransen, J.Jolie, J.-M.Regis, T.Thomas, N.Warr

Low-spin structure of 8635Br51 and 8636Kr50 nuclei: The role of the g7/2 neutron orbital

RADIOACTIVITY 86Se, 86Br(β-)[from 235U(n, γ), E=thermal neutrons from PF1B-ILL-Grenoble facility using Lohengrin fission-fragment separator]; measured Eγ, Iγ, γγ-coin for both decays, γγ(θ) and γγ(linear polarization) for 86Br decay using EXILL array of Ge detectors. 86Br, 86Kr; deduced levels, J, π, conversion coefficients, multipolarities, β feedings, logft. Comparison with large-scale shell-model calculations with refined interactions.

NUCLEAR REACTIONS 235U(n, γ), E=thermal neutrons from PF1B-ILL-Grenoble facility; measured Eγ, Iγ, γγ-coin using EXILL array of Ge detectors, level half-life by γγ(t). 86Br; deduced levels, J, π, B(M2), B(E3).

doi: 10.1103/PhysRevC.94.044328
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2015BR10      Phys.Rev. C 92, 034306 (2015)

T.Braunroth, A.Dewald, H.Iwasaki, S.M.Lenzi, M.Albers, V.M.Bader, T.Baugher, T.Baumann, D.Bazin, J.S.Berryman, C.Fransen, A.Gade, T.Ginter, A.Gottardo, M.Hackstein, J.Jolie, A.Lemasson, J.Litzinger, S.Lunardi, T.Marchi, V.Modamio, C.Morse, D.R.Napoli, A.Nichols, F.Recchia, S.R.Stroberg, R.Wadsworth, D.Weisshaar, K.Whitmore, K.Wimmer

Reduced transition strengths of low-lying yrast states in chromium isotopes in the vicinity of N=40

NUCLEAR REACTIONS 9Be(59Mn, 58Cr), E=92.1 MeV/nucleon; 9Be(61Mn, 60Cr), E=91.9 MeV/nucleon; 9Be(63Mn, 62Cr), E=98 MeV/nucleon, [secondary 59,61,63Mn beams from 9Be(82Se, X), E=140 MeV/nucleon primary reaction using A1900 separator at NSCL-MSU]; measured Eγ, Iγ, beam-like recoil particle spectra and yields, (particle)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using S800 spectrograph and SeGA array. 58,60,62Cr; deduced levels, J, π, B(E2), intrinsic quadrupole moments Q0 and deformation parameter β2. Comparison with calculations using shell-model with LNPS interactions, realistic shell-model, and IBM-2. Systematics of energies and B(E2) for first 2+ states in N=22-52, Ti, Cr, Fe, Ni, Se and Kr nuclei. Systematics of ratios of energies and B(E2) values for first 2+, 4+ and 6+ states in 52,54,56,58,60,62Cr, and E(5) limit.

doi: 10.1103/PhysRevC.92.034306
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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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2015DI04      Phys.Rev. C 91, 054321 (2015)

J.Diriken, N.Patronis, A.Andreyev, S.Antalic, V.Bildstein, A.Blazhev, I.G.Darby, H.De Witte, J.Eberth, J.Elseviers, V.N.Fedosseev, F.Flavigny, Ch.Fransen, G.Georgiev, R.Gernhauser, H.Hess, M.Huyse, J.Jolie, Th.Kroll, R.Krucken, R.Lutter, B.A.Marsh, T.Mertzimekis, D.Muecher, R.Orlandi, A.Pakou, R.Raabe, G.Randisi, P.Reiter, T.Roger, M.Seidlitz, M.Seliverstov, C.Sotty, H.Tornqvist, J.Van De Walle, P.Van Duppen, D.Voulot, N.Warr, F.Wenander, K.Wimmer

Experimental study of the 66Ni(d, p) 67Ni one-neutron transfer reaction

NUCLEAR REACTIONS 2H(66Ni, p), E=2.95 MeV/nucleon, [secondary 66Ni beam from U(p, X), E=1.4 GeV primary reaction using RILIS and REX-TRAP at ISOLDE-CERN]; measured Eπ, Ip, Eγ, Iγ, γγ(t), pγ-, pγγ-coin, isomer half-life, σ(θ) for protons using T-REX setup for charged-particles and Miniball (MB) array for γ detection. 67Ni; deduced levels, J, π, l-transfer, configurations, spectroscopic factors, asymptotic normalization constants (ANCs), single-neutron strengths. DWBA analysis of σ(θ) data. Comparison with proton single-particle strength distribution in 89Y, and with shell model calculations. Systematics of summed single-particle spectroscopic factors and C2S weighted centroid energies for 59,61,63,65,67Ni.

doi: 10.1103/PhysRevC.91.054321
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2015GA19      Phys.Rev. C 91, 064313 (2015)

L.P.Gaffney, A.P.Robinson, D.G.Jenkins, A.N.Andreyev, M.Bender, A.Blazhev, N.Bree, B.Bruyneel, P.A.Butler, T.E.Cocolios, T.Davinson, A.N.Deacon, H.De Witte, D.DiJulio, J.Diriken, A.Ekstrom, Ch.Fransen, S.J.Freeman, K.Geibel, T.Grahn, B.Hadinia, M.Hass, P.-H.Heenen, H.Hess, M.Huyse, U.Jakobsson, N.Kesteloot, J.Konki, Th.Kroll, V.Kumar, O.Ivanov, S.Martin-Haugh, D.Mucher, R.Orlandi, J.Pakarinen, A.Petts, P.Peura, P.Rahkila, P.Reiter, M.Scheck, M.Seidlitz, K.Singh, J.F.Smith, J.Van de Walle, P.Van Duppen, D.Voulot, R.Wadsworth, N.Warr, F.Wenander, K.Wimmer, K.Wrzosek-Lipska, M.Zielinska

Collectivity in the light radon nuclei measured directly via Coulomb excitation

NUCLEAR REACTIONS 109Ag, 120Sn(202Rn, 202Rn'), (204Rn, 204Rn'), E=2.845, 2.90, 2.28 MeV, [secondary 202,204Rn beams from U(p, X), E=1.4 GeV from Proton Synchrotron Booster, REX-TRAP, REX-EBIS and REX-LINAC at ISOLDE-CERN facility]; measured scattered heavy ion spectra, Eγ, Iγ, (particle)γ-coin using Miniball array. Coulomb excitation. 202,204Rn; deduced levels, E2 matrix elements, spectroscopic quadrupole moment, B(E2). GOSIA analysis of experimental data for 202,204Rn and 109Ag, 120Sn from Coulomb excitation. Comparison with state-of-the-art beyond-mean-field model calculations. Systematics of energies and transition quadrupole moments of yrast states, B(E2) and quadrupole deformation for first 2+ states in 198,200,202,204,206,208,210,212Rn.

doi: 10.1103/PhysRevC.91.064313
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2015GA38      Eur.Phys.J. A 51, 136 (2015)

L.P.Gaffney, J.Van de Walle, B.Bastin, V.Bildstein, A.Blazhev, N.Bree, J.Cederkall, I.Darby, H.De Witte, D.DiJulio, J.Diriken, V.N.Fedosseev, Ch.Fransen, R.Gernhauser, A.Gustafsson, H.Hess, M.Huyse, N.Kesteloot, Th.Kroll, R.Lutter, B.A.Marsh, P.Reiter, M.Seidlitz, P.Van Duppen, D.Voulot, N.Warr, F.Wenander, K.Wimmer, K.Wrzosek-Lipska

Low-energy Coulomb excitation of 62Fe and 62Mn following in-beam decay of 62Mn

NUCLEAR REACTIONS 109Ag(62Mn, 62Mn'), (62Fe, 62Fe'), E=2.86 MeV/nucleon; measured Coulomb excitation Eγ, Iγ, projectile, recoil; deduced B(E2). 62Mn deduced γ transitions, levels, J, π.

doi: 10.1140/epja/i2015-15136-6
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2015KE06      Phys.Rev. C 92, 054301 (2015)

N.Kesteloot, B.Bastin, L.P.Gaffney, K.Wrzosek-Lipska, K.Auranen, C.Bauer, M.Bender, V.Bildstein, A.Blazhev, S.Bonig, N.Bree, E.Clement, T.E.Cocolios, A.Damyanova, I.Darby, H.De Witte, D.DiJulio, J.Diriken, C.Fransen, J.E.Garcia-Ramos, R.Gernhauser, T.Grahn, P.-H.Heenen, H.Hess, K.Heyde, M.Huyse, J.Iwanicki, U.Jakobsson, J.Konki, T.Kroll, B.Laurent, N.Lecesne, R.Lutter, J.Pakarinen, P.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, M.Scheck, M.Seidlitz, M.Sferrazza, B.Siebeck, M.Sjodin, H.Tornqvist, E.Traykov, J.Van De Walle, P.Van Duppen, M.Vermeulen, D.Voulot, N.Warr, F.Wenander, K.Wimmer, M.Zielinska

Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes

NUCLEAR REACTIONS 104Pd(196Po, 196Po'), (200Po, 200Po'), (202Po, 202Po'), 94Mo(198Po, 198Po'), (202Po, 202Po'), E=2.85 MeV/nucleon, [secondary Po beams from U(p, X), E=1.4 GeV at REX-ISOLDE-CERN facility]; measured Eγ, Iγ, γγ-coin, (Po x ray)γ-coin, (scattered particle)γ-coin, (particle)γ(t), angular distribution of scattered particles, Coulomb excitation yields for excited states in beams and targets during laser-on and laser-off using double-sided silicon-strip detectors (DSSSDs) for particles and Miniball array for γ rays. 196,198,200,202Po; deduced levels, J, π, E2 matrix elements, B(E2), deformation parameters, transition quadrupole moments. 94Mo, 104Pd; deduced levels, Coulomb excitation yields. GOSIA analysis of Coulomb excitation yields. Comparison with predictions of beyond-mean-field (BMF) model, interacting boson model (IBM), general Bohr Hamiltonian (GBH) model, phenomenological two-level mixing model, and with previous measurement of mean-square charge radii.

doi: 10.1103/PhysRevC.92.054301
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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, 86Se

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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2015MA51      Phys.Rev. C 92, 034305 (2015)

T.Materna, W.Urban, K.Sieja, U.Koster, H.Faust, M.Czerwinski, T.Rzaca-Urban, C.Bernards, C.Fransen, J.Jolie, J.-M.Regis, T.Thomas, N.Warr

Low spin structure of 86Se: Confirmation of γ collectivity at N=52

RADIOACTIVITY 86As(β-)[from 235U(n, F), E=thermal followed by mass separation using Lohengrin separator at ILL-Grenoble]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin, γγ(θ). 86Se; deduced levels, J, π, γ collectivity. Comparison with systematics of neighboring nuclides, and with shell-model calculations. 94,96Y, 99Zr; observed γ rays.

NUCLEAR STRUCTURE 86Se; calculated levels, J, π, B(M1), B(E2) using shell model. 84Ge, 86Se, 88Kr, 90Sr, 92Zr; calculated energies of second 2+ and 4+, and first 3+ states. Comparison with experimental values.

doi: 10.1103/PhysRevC.92.034305
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2015NI01      Phys.Rev. C 91, 014319 (2015)

A.J.Nichols, R.Wadsworth, M.A.Bentley, P.J.Davies, J.Henderson, D.G.Jenkins, I.Paterson, H.Iwasaki, A.Lemasson, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, A.Gade, C.Morse, S.R.Stroberg, D.Weisshaar, K.Whitmore, K.Wimmer, G.de Angelis, A.Dewald, T.Braunroth, C.Fransen, M.Hackstein, D.Miller

Spectroscopy and lifetime measurements in 66Ge, 69Se, and 65Ga using fragmentation reactions

NUCLEAR REACTIONS 9Be(70Se, 66Ge), (70Se, 69Se), (70Se, 65Ga), (69As, 65Ga), E not given, [secondary 70Se and 69As beams from 9Be(78Kr, X), E=150 MeV/nucleon fragmentation reaction]; measured Eγ, Iγ, level half-lives by γ line-shape method at NSCL-MSU Coupled Cyclotron facility. 65Ga, 66Ge, 69Se; deduced levels, J, π, B(M1), B(E2). Comparison with shell-model calculations using GXPF1A interaction in the fp model space.

doi: 10.1103/PhysRevC.91.014319
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2015RU03      Phys.Rev. C 91, 044301 (2015)

M.Rudigier, K.Nomura, M.Dannhoff, R-B.Gerst, J.Jolie, N.Saed-Samii, S.Stegemann, J.-M.Regis, L.M.Robledo, R.Rodriguez-Guzman, A.Blazhev, Ch.Fransen, N.Warr, K.O.Zell

Evolution of E2 transition strength in deformed hafnium isotopes from new measurements on 172Hf, 174Hf, and 176Hf

NUCLEAR REACTIONS 170,172Yb(α, 2n), E=27 MeV; 174Yb(α, 2n), E=26 MeV; measured conversion-electron momentum spectra using Cologne Orange magnetic spectrometer, Eγ, Iγ, γγ-, (ce)γγ-coin, level half-lives by (ce)γ(t) and γγ(t) methods with emphasis on the first 2+ states. 172,174,176Hf; deduced levels, J, π, B(E2). Comparison with previous results, and with theoretical model calculations.

NUCLEAR STRUCTURE 168,170,172,174,176,178,180Hf; calculated contour plots of the deformation energy surfaces in (β, γ) plane for 168Hf to 176Hf, parameters for the IBM Hamiltonian, levels, J, π, moments of inertia and B(E2) for levels in the ground-state rotational band. Interacting boson model with Hamiltonian from Gogny HFB calculations using the D1M interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.044301
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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, 73Cu

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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2014BR05      Phys.Rev.Lett. 112, 162701 (2014)

N.Bree, K.Wrzosek-Lipska, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, J.Butterworth, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, L.P.Gaffney, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, F.Wenander, A.Wiens, J.L.Wood, M.Zielinska

Shape Coexistence in the Neutron-Deficient Even-Even 182-188Hg Isotopes Studied via Coulomb Excitation

NUCLEAR REACTIONS 120Sn, 107Ag, 112,114Cd(182Hg, 182Hg'), (184Hg, 184Hg'), (186Hg, 186Hg'), (188Hg, 188Hg'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. 182,184,186,188Hg; deduced energy levels, J, π, nuclear matrix elements, B(E2). Comparison with IBM calculations, experimental data.

doi: 10.1103/PhysRevLett.112.162701
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2014DI08      Phys.Lett. B 736, 533 (2014)

J.Diriken, N.Patronis, A.N.Andreyev, S.Antalic, V.Bildstein, A.Blazhev, I.G.Darby, H.De Witte, J.Eberth, J.Elseviers, V.N.Fedosseev, F.Flavigny, Ch.Fransen, G.Georgiev, R.Gernhauser, H.Hess, M.Huyse, J.Jolie, Th.Kroll, R.Krucken, R.Lutter, B.A.Marsh, T.Mertzimekis, D.Muecher, F.Nowacki, R.Orlandi, A.Pakou, R.Raabe, G.Randisi, P.Reiter, T.Roger, M.Seidlitz, M.Seliverstov, K.Sieja, C.Sotty, H.Tornqvist, J.Van De Walle, P.Van Duppen, D.Voulot, N.Warr, F.Wenander, K.Wimmer

Study of the deformation-driving νd5/2 orbital in 6728Ni39 using one-neutron transfer reactions

NUCLEAR REACTIONS 2H(66Ni, p)67Ni, E=2.95 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced energy levels, σ(θ), single-particle strength. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2014.08.004
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2014FU02      Phys.Rev.Lett. 112, 112502 (2014)

Y.Fujita, H.Fujita, T.Adachi, C.L.Bai, A.Algora, G.P.A.Berg, P.von Brentano, G.Colo, M.Csatlos, J.M.Deaven, E.Estevez Aguado, C.Fransen, D.De Frenne, K.Fujita, E.Ganioglu, C.J.Guess, J.Gulyas, K.Hatanaka, K.Hirota, M.Honma, D.Ishikawa, E.Jacobs, A.Krasznahorkay, H.Matsubara, K.Matsuyanagi, R.Meharchand, F.Molina, K.Muto, K.Nakanishi, A.Negret, H.Okamura, H.J.Ong, T.Otsuka, N.Pietralla, G.Perdikakis, L.Popescu, B.Rubio, H.Sagawa, P.Sarriguren, C.Scholl, Y.Shimbara, Y.Shimizu, G.Susoy, T.Suzuki, Y.Tameshige, A.Tamii, J.H.Thies, M.Uchida, T.Wakasa, M.Yosoi, R.G.T.Zegers, K.O.Zell, J.Zenihiro

Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei

NUCLEAR REACTIONS 42Ca, 46Ti, 50Cr, 54Fe(3He, t), E=140 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced cumulative-sum strengths of the experimental B(GT) values in the final nuclei, two kinds of GT phonon states. GXPF1J, quasi particle random phase approximation (QRPA) framework based on a self-consistent Hartree-Fock mean field with Skyrme interaction calculations, comparison with available data.

doi: 10.1103/PhysRevLett.112.112502
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2014GA04      Phys.Rev. C 89, 024307 (2014);Erratum Phys.Rev. C 89, 059905 (2014)

L.P.Gaffney, M.Hackstein, R.D.Page, T.Grahn, M.Scheck, P.A.Butler, P.F.Bertone, N.Bree, R.J.Carroll, M.P.Carpenter, C.J.Chiara, A.Dewald, F.Filmer, C.Fransen, M.Huyse, R.V.F.Janssens, D.T.Joss, R.Julin, F.G.Kondev, P.Nieminen, J.Pakarinen, S.V.Rigby, W.Rother, P.Van Duppen, H.V.Watkins, K.Wrzosek-Lipska, S.Zhu

Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in 184, 186Hg and two-state mixing calculations

NUCLEAR REACTIONS 148Sm(40Ar, 4n), E=200 MeV; 150Sm(40Ar, 4n), E=195 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by RDDS method using Gammasphere and Cologne plunger device at ATLAS-ANL facility. 184,186Hg; deduced levels, B(E2), transitional quadrupole moments, shape coexistence, deformation for normal and intruder bands. Comparison with two-state mixing model calculations. Systematics of yrast bands in even A=172-204 Hg isotopes.

NUCLEAR STRUCTURE 180,182,184,186,188Hg; calculated rotational bands built on first two 0+ states, B(E2), wavefunction amplitudes using two-state mixing in VMI model.

doi: 10.1103/PhysRevC.89.024307
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2014IL01      Phys.Rev. C 89, 014313 (2014)

S.Ilieva, M.Thurauf, Th.Kroll, R.Krucken, T.Behrens, V.Bildstein, A.Blazhev, S.Bonig, P.A.Butler, J.Cederkall, T.Davinson, P.Delahaye, J.Diriken, A.Ekstrom, F.Finke, L.M.Fraile, S.Franchoo, Ch.Fransen, G.Georgiev, R.Gernhauser, D.Habs, H.Hess, A.M.Hurst, M.Huyse, O.Ivanov, J.Iwanicki, P.Kent, O.Kester, U.Koster, R.Lutter, M.Mahgoub, D.Martin, P.Mayet, P.Maierbeck, T.Morgan, O.Niedermeier, M.Pantea, P.Reiter, T.R.Rodriguez, Th.Rolke, H.Scheit, A.Scherillo, D.Schwalm, M.Seidlitz, T.Sieber, G.S.Simpson, I.Stefanescu, S.Thiel, P.G.Thirolf, J.Van de Walle, P.Van Duppen, D.Voulot, N.Warr, W.Weinzierl, D.Weisshaar, F.Wenander, A.Wiens, S.Winkler

Coulomb excitation of neutron-rich Cd isotopes

NUCLEAR REACTIONS 108Pd(122Cd, 122Cd'), 64Zn, 104Pd(124Cd, 124Cd'), 64Zn(126Cd, 126Cd'), E=2.85 MeV/nucleon, [secondary 122,124,126Cd beams from 238U(p, X), E=1.2 GeV primary reaction]; measured Eγ, Iγ, particle spectra, γγ-, (particle)γ-coin, γ-ray yields, γ(θ), σ(θ), half-life of first 2+ state of 126Cd by DSAM using REXTRAP and EBIS setup, Miniball array for γ rays and DSSDs for particle detection at REX-ISOLDE-CERN facility. 122,124,126Cd; deduced levels, Coulomb-excitation σ, transition and diagonal matrix elements, static quadrupole moments, and B(E2) for first 2+ states. Comparison with shell model and beyond mean field calculations. Discussed onset of collectivity in the vicinity of Z=50 and N=82 shell closures. Systematics of experimental and theoretical values of B(E2) for first 2+ states in A=116-130 even Cd isotopes.

doi: 10.1103/PhysRevC.89.014313
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2014MO26      Phys.Rev. C 90, 034310 (2014)

C.Morse, H.Iwasaki, A.Lemasson, T.Baugher, D.Bazin, J.S.Berryman, A.Dewald, C.Fransen, A.Gade, S.McDaniel, A.J.Nichols, A.Ratkiewicz, S.R.Stroberg, P.Voss, R.Wadsworth, D.Weisshaar, K.Wimmer, R.Winkler

Lifetime measurements of the yrast 8+ and 9+ states in 70As

NUCLEAR REACTIONS 9Be(78Rb, 70As), E=101.6 MeV/nucleon, [secondary 78Rb beam from 9Be(78Kr, X), E=150 MeV/nucleon primary reaction]; measured Doppler corrected Eγ, Iγ, γγ-, (70As)γ-coin, level half-lives by line-shape analysis using A1900 fragment separator, S-800 spectrometer, and SeGA array at NSCL-MSU facility. 70As; deduced levels, J, π, B(E1), B(M1), configuration. Comparison of B(M1) values for 66Ga, 70As, 74Br, 78Rb and 82Y with predictions of particle-vibration coupling model.

doi: 10.1103/PhysRevC.90.034310
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2014NE18      Nucl.Instrum.Methods Phys.Res. A 754, 94 (2014)

L.Netterdon, V.Derya, J.Endres, C.Fransen, A.Hennig, J.Mayer, C.Muller-Gatermann, A.Sauerwein, P.Scholz, M.Spieker, A.Zilges

The γ-ray spectrometer HORUS and its applications for nuclear astrophysics

NUCLEAR REACTIONS 89Y(p, γ), E=3.5-4.6 MeV; measured products, Eγ, Iγ; deduced σ, σ(E). Data were imported from EXFOR entry O2203.

doi: 10.1016/j.nima.2014.04.025
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2014NI09      Phys.Lett. B 733, 52 (2014)

A.J.Nichols, R.Wadsworth, H.Iwasaki, K.Kaneko, A.Lemasson, G.de Angelis, V.M.Bader, T.Baugher, D.Bazin, M.A.Bentley, J.S.Berryman, T.Braunroth, P.J.Davies, A.Dewald, C.Fransen, A.Gade, M.Hackstein, J.Henderson, D.G.Jenkins, D.Miller, C.Morse, I.Paterson, E.C.Simpson, S.R.Stroberg, D.Weisshaar, K.Whitmore, K.Wimmer

Collectivity in A ∼ 70 nuclei studied via lifetime measurements in 70Br and 68, 70Se

NUCLEAR REACTIONS 9Be(71Br, 70Br'), (70Se, 68Se'), (70Se, 70Se'), E < 150 MeV/nucleon; measured reaction products, Eγ, Iγ. 70Br, 68,70Se; deduced energy levels, J, π, B(Eλ). Comparison with shell model calculations using GXPF1 nuclear interaction, available data.

doi: 10.1016/j.physletb.2014.04.016
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