NSR Query Results
Output year order : Descending NSR database version of April 25, 2024. Search: Author = T.Renstrom Found 69 matches. 2024UT01 Phys.Rev. C 109, 014617 (2024) H.Utsunomiya, S.Goriely, M.Kimura, N.Shimizu, Y.Utsuno, G.M.Tveten, T.Renstrom, T.Ari-izumi, S.Miyamoto Photoneutron emission cross sections for 13C
doi: 10.1103/PhysRevC.109.014617
2023LA08 Phys.Rev. C 108, 025804 (2023) A.C.Larsen, G.M.Tveten, T.Renstrom, H.Utsunomiya, E.Algin, T.Ari-izumi, K.O.Ay, F.L.Bello Garrote, L.Crespo Campo, F.Furmyr, S.Goriely, A.Gorgen, M.Guttormsen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, T.Laplace, E.Lima, M.Markova, J.E.Midtbo, S.Miyamoto, A.H.Mjos, V.Modamio, M.Ozgur, F.Pogliano, S.Riemer-Sorensen, E.Sahin, S.Shen, S.Siem, A.Spyrou, M.Wiedeking New experimental constraint on the 185W(n, γ)186W cross section NUCLEAR REACTIONS 182,183,184W(γ, n), E=6.5-13 MeV; measured In, En; deduced σ(E), γ-ray strength function (GSF). 186W(α, α'γ), E=30 MeV; measured Eα, Iα, Eγ, Iγ, αγ-coin; deduced nuclear level density (NLD), γ-ray strength function (GSF). 185W(n, γ), T=0.5-1.1 GK; calculated Maxwellian averaged σ(E) (MACS), reaction rate (stellar reactivity), compared with experimental results, and recommended σ in compilations by Bao et al. Comparison to other experimental data, TALYS calculations and KADONIS-1.0 data. Photoneutron reactions were measured with quasi-monochromatic photon beam at NewSubaru synchrotron radiation facility using 4π detector consisting of 20 3He proportional counters. Experiment on inelastic α-scattering was performed at the Oslo Cyclotron Laboratory (OCL) using CACTUS NaI(Tl) scintillator γ-ray detector array, the Silicon Ring (SiRi) detector array and beam from MC-35 Scanditronix cyclotron.
doi: 10.1103/PhysRevC.108.025804
2023LE04 Eur.Phys.J. A 59, 42 (2023) R.Lewis, A.Couture, S.N.Liddick, A.Spyrou, D.L.Bleuel, L.Crespo Campo, B.P.Crider, A.C.Dombos, M.Guttormsen, T.Kawano, A.C.Larsen, A.M.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem Statistical (n, γ) cross section model comparison for short-lived nuclei NUCLEAR REACTIONS 73Zn(n, γ), E<1 MeV; calculated σ using TALYS, EMPIRE, and CoH, level densities, γ-ray strength function. Comparison with experimental data.
doi: 10.1140/epja/s10050-023-00920-0
2023MA33 Phys.Rev. C 108, 014315 (2023) M.Markova, A.C.Larsen, G.M.Tveten, P.von Neumann-Cosel, T.K.Eriksen, F.L.Bello Garrote, L.Crespo Campo, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, M.Klintefjord, T.Renstrom, E.Sahin, S.Siem, T.G.Tornyi Nuclear level densities and γ-ray strength functions of 111, 112, 113Sn isotopes studied with the Oslo method NUCLEAR REACTIONS 112Sn(p, p'γ), E=25 MeV;112Sn(p, dγ), E=16 MeV;113Sn(d, pγ), E=11.5 MeV; measured reaction products, charged particles, deuteron spectra, Ep, Ip, Eγ, Iγ, pγ-coin, (deuteron)γ-coin. 111,112,113Sn; deduced nuclear level density, experimental entropy, γ-strength functions, parameters of isovector giant dipole resonance, E1 and M1 strength distributions. Oslo method type of analysis. Comparison to the data obtained with different methods and to the data on the other isotopes from Sn chain. All three nuclei demonstrate a trend compatible with the constant-temperature model. CACTUS NaI(Tl) scintillator γ-ray detector array and the Silicon Ring (SiRi) detector array at MC-35 Scanditronix cyclotron.
doi: 10.1103/PhysRevC.108.014315
2022BE24 Phys.Lett. B 834, 137479 (2022) F.L.Bello Garrote, A.Lopez-Martens, A.C.Larsen, I.Deloncle, S.Peru, F.Zeiser, P.T.Greenlees, B.V.Kheswa, K.Auranen, D.L.Bleuel, D.M.Cox, L.Crespo Campo, F.Giacoppo, A.Gorgen, T.Grahn, M.Guttormsen, T.W.Hagen, L.Harkness-Brennan, K.Hauschild, G.Henning, R.-D.Herzberg, R.Julin, S.Juutinen, T.A.Laplace, M.Leino, J.E.Midtbo, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, T.Renstrom, K.Rezynkina, M.Sandzelius, J.Saren, C.Scholey, S.Siem, J.Sorri, S.Stolze, J.Uusitalo Experimental observation of the M1 scissors mode in 254No NUCLEAR REACTIONS 208Pb(48Ca, 2n)254No, E=220, 222 MeV; 154Sm(48Ca, 6n)196Pb, E not given; measured Eγ, Iγ, prompt and recoil-gated γ-ray singles spectra, polarization asymmetries of discreet γ rays in 254No and 196Pb; deduced experimental γ-ray yield and compared with simulated γ spectra using RAINIER code, γ-strength function (γSF), B(M1), B(E1), widths, scissors mode of excitation in 254No. Comparison with BSFG + E1SLO + M1SLO model combination; tested parameters for the GDR and the spin-flip resonance by HFB calculations. Comparison of B(M1) strength with QRPA calculations.
doi: 10.1016/j.physletb.2022.137479
2022GU17 Phys.Rev. C 106, 034314 (2022) M.Guttormsen, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, H.C.Berg, L.Crespo Campo, T.Dahl-Jacobsen, F.W.Furmyr, D.Gjestvang, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, I.K.B.Kullmann, M.Klintefjord, M.Markova, J.E.Midtbo, V.Modamio, W.Paulsen, L.G.Pedersen, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking Evolution of the γ-ray strength function in neodymium isotopes NUCLEAR REACTIONS 142,144,146,148,150Nd(p, p'γ), (d, pγ), E(p)=16.0 MeV, E(d)=13.5 MeV; measured Eγ, Iγ, E(p), pγ-coin using SiRi array of 64 ΔE-E particle telescopes, and OSCAR array of 15 to 30 LaBr3(Ce) scintillators for γ detection at the Oslo Cyclotron Laboratory. 142,144,145,146,147,148,149,150,151Nd; deduced energies, widths and cross sections of giant dipole resonances (GDR), pygmy-dipole resonances (PDR), scissors mode (SM) resonances, low-energy enhancement (LEE) structures, average probability for populating levels, γ strength functions as function of Eγ, (γSF(Eγ)) and nuclear level densities (NLD) using the OSLO method, integrated LEE and SM strengths B(M1), cross over from spherical to deformed shapes for neodymium isotopes.
doi: 10.1103/PhysRevC.106.034314
2022NA07 Nucl.Phys. A1018, 122359 (2022) F.Naqvi, S.Karampagia, A.Spyrou, S.N.Liddick, A.C.Dombos, D.L.Bleuel, B.A.Brown, L.Crespo Campo, A.Couture, B.Crider, T.Ginter, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, G.Perdikakis, C.Prokop, T.Renstrom, S.Siem Total absorption spectroscopy measurement on neutron-rich 74, 75Cu isotopes RADIOACTIVITY 74,75Cu(β-) [from 9Be(86Kr, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced T1/2, cumulative β-decay intensities, B(GT). Comparison with available data.
doi: 10.1016/j.nuclphysa.2021.122359
2021GU12 Phys.Lett. B 816, 136206 (2021) M.Guttormsen, Y.Alhassid, W.Ryssens, K.O.Ay, M.Ozgur, E.Algin, A.C.Larsen, F.L.Bello Garrote, L.Crespo Campo, T.Dahl-Jacobsen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, M.Klintefjord, J.E.Midtbo, V.Modamio, T.Renstrom, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes NUCLEAR REACTIONS 142,144,146,148,150Nd(p, X), E=16 MeV; 142,144,146,148,150Nd(α, X), E=13.5 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, nuclear level densities, quadrupole deformation parameters. Comparison with the shell model Monte Carlo (SMMC) calculations.
doi: 10.1016/j.physletb.2021.136206
2021MA04 Phys.Rev. C 103, 014309 (2021) K.L.Malatji, K.S.Beckmann, M.Wiedeking, S.Siem, S.Goriely, A.C.Larsen, K.O.Ay, F.L.Bello Garrote, L.Crespo Campo, A.Gorgen, M.Guttormsen, V.W.Ingeberg, P.Jones, B.V.Kheswa, P.von Neumann-Cosel, M.Ozgur, G.Potel, L.Pellegri, T.Renstrom, G.M.Tveten, F.Zeiser Statistical properties of the well deformed 153, 155Sm nuclei and the scissors resonance NUCLEAR REACTIONS 152Sm(d, pγ)153Sm, E=13.5 MeV; 154Sm(d, pγ)155Sm, E=13 MeV; measured Eγ, Iγ, charged particles, (particle)γ-coin using SiRi particle telescope and CACTUS scintillator arrays at the University of Oslo Cyclotron Laboratory; deduced γ strength functions (γSF) and nuclear level densities (NLD) using the Oslo method and normalized using rigid moment of inertia (RMI) and Hartree-Fock-Bogoliubov plus combinatorial (HFB+comb) models, and extrapolated with the constant temperature (CT) and Fermi gas models, pronounced M1 scissors resonances (SR). Comparison with quasi-particle random phase approximation (QRPA) calculations, with D1M Gogny interaction, and with results of previous experimental results using (d, pγ) and other reactions.
doi: 10.1103/PhysRevC.103.014309
2021PE08 Phys.Rev. C 103, 055808 (2021) C.F.Persch, P.A.DeYoung, S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, J.Gombas, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, S.Karampagia, S.Mosby, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn β-decay feeding intensity distributions of 71, 73Ni RADIOACTIVITY 71,73Ni(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 fragment separator at NSCL-MSU facility]; measured implantation events and β particles using position-sensitive, double-sided, silicon-strip detector (DSSD), and two silicon PIN detectors for TOF and energy loss, Eγ, Iγ, half-lives of decays of 71,73Ni using a total absorption summing NaI(Tl) detector (SuN) surrounding the DSSD; deduced multiplicity spectra, Iβ(E) feedings, B(GT). GEANT4 and DICEBOX analysis of total absorption spectrum (TAS). Comparison with QRPA, and shell-model calculations, the latter using NuShellX@MSU code with JJ44B and JUN45 interaction Hamiltonians. Relevance to improvement in the nuclear input for r-process calculations. NUCLEAR REACTIONS 9Be(86Kr, X)71Ni/73Ni/71Cu/73Cu/, E=140 MeV/nucleon; measured yields of reaction products using A1900 fragment separator and two silicon PIN detectors for TOF and energy loss at NSCL-MSU facility.
doi: 10.1103/PhysRevC.103.055808
2020KA09 Nucl.Data Sheets 163, 109 (2020) T.Kawano, Y.S.Cho, P.Dimitriou, D.Filipescu, N.Iwamoto, V.Plujko, X.Tao, H.Utsunomiya, V.Varlamov, R.Xu, R.Capote, I.Gheorghe, O.Gorbachenko, Y.L.Jin, T.Renstrom, M.Sin, K.Stopani, Y.Tian, G.M.Tveten, J.M.Wang, T.Belgya, R.Firestone, S.Goriely, J.Kopecky, M.Krticka, R.Schwengner, S.Siem, M.Wiedeking IAEA Photonuclear Data Library 2019
doi: 10.1016/j.nds.2019.12.002
2020KI17 Phys.Rev.Lett. 125, 182701 (2020) T.Kibedi, B.Alshahrani, A.E.Stuchbery, A.C.Larsen, A.Gorgen, S.Siem, M.Guttormsen, F.Giacoppo, A.I.Morales, E.Sahin, G.M.Tveten, F.L.Bello Garrote, L.Crespo Campo, T.K.Eriksen, M.Klintefjord, S.Maharramova, H.-T.Nyhus, T.G.Tornyi, T.Renstrom, W.Paulsen Radiative Width of the Hoyle State from γ-Ray Spectroscopy NUCLEAR REACTIONS 12C(p, p'), E=10.7 MeV; measured reaction products, Eγ, Iγ, γ-γ-p coin.; deduced γ-ray energies, resonances, radiative branching ratio, radiative widths. Comparison with available data.
doi: 10.1103/PhysRevLett.125.182701
2019BR10 Phys.Rev. C 99, 054330 (2019) C.P.Brits, K.L.Malatji, M.Wiedeking, B.V.Kheswa, S.Goriely, F.L.Bello Garrote, D.L.Bleuel, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, T.W.Hagen, S.Hilaire, V.W.Ingeberg, H.Jia, M.Klintefjord, A.C.Larsen, S.N.T.Majola, P.Papka, S.Peru, B.Qi, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser Nuclear level densities and γ-ray strength functions of 180, 181, 182Ta NUCLEAR REACTIONS 181Ta(d, p), E=12.5 MeV; 181Ta(d, d'), (d, t), E=12.5, 15 MeV; 181Ta(3He, 3He'), (3He, α), E=34 MeV; measured Ep, Ip, Ed, Id, E(t), I(t), E(3He), I(3He), Eα, Iα, Eγ, Iγ, and (particle)γ-coin using the SiRi particle telescope for charged particles and CACTUS scintillator for γ detection at the Oslo Cyclotron Laboratory. 180,181,182Ta; deduced γ strength functions (γSF), nuclear level densities (NLDs) by OSLO method, energy and γ deformation of scissors resonance (SR). Back-shifted Fermi-gas, constant temperature plus Fermi gas, and Hartree-Fock-Bogoliubov plus combinatorial models used for absolute normalization of experimental NLDs at the neutron separation energies. 181Ta(n, γ), E=0.004-1 MeV; deduced σ(E). Comparison with theoretical model calculations, and with previous experimental results. 181,182Ta; calculated potential energy surfaces in (ϵ2, γ) plane for the ground states using the cranking Nilsson model plus shell correction method.
doi: 10.1103/PhysRevC.99.054330
2019KR16 Acta Phys.Pol. B50, 487 (2019) M.Krzysiek, H.Utsunomiya, I.Gheorghe, D.M.Filipescu, T.Renstrom, G.M.Tveten, S.Belyshev, K.Stopani, H.Wang, G.Fan, Y.-W.Lui, D.Symochko, S.Goriely, A.-C.Larsen, S.Siem, V.Varlamov, B.Ishkhanov, T.Ari-izumi, S.Miyamoto Photoneutron Cross-section Measurements for 165Ho by the Direct Neutron-Multiplicity Sorting at NewSUBARU NUCLEAR REACTIONS 165Ho(γ, γ'), E=11.5-43.2 MeV; measured In, neutron multiplicity; deduced photoneutron σ(E). Flat-efficeincy neutron detector for direct neutron-multiplicity sorting method.
doi: 10.5506/aphyspolb.50.487
2019KU11 Phys.Rev. C 99, 065806 (2019) I.K.B.Kullmann, A.C.Larsen, T.Renstrom, K.S.Beckmann, F.L.Bello Garrote, L.Crespo Campo, A.Gorgen, M.Guttormsen, J.E.Midtbo, E.Sahin, S.Siem, G.M.Tveten, F.Zeiser First experimental constraint on the 191Os(n, γ) reaction rate relevant to s-process nucleosynthesis NUCLEAR REACTIONS 192Os(α, α'), E=30 MeV; measured Eα, Iα, Eγ, Iγ, and αγ-coin using the CACTUS array for γ detection and the SiRi array for charged particle detection at the Oslo Cyclotron Laboratory. 192Os; deduced nuclear level density and γ-ray strength function. 191Os(n, γ), E=0-100 keV; calculated Maxwellian-averaged σ(E) using TALYS code, and compared with KADoNiS database and evaluated libraries such as TENDL-2017, ENDF/B-VII.0, and JEFF. Systematics of γ-strength functions, nuclear level densities and average radiative widths for 187,188,189,190,192,193Os, 181,183,184,185,187W, 186,188Re, 192,193,194Ir.
doi: 10.1103/PhysRevC.99.065806
2019LE05 Phys.Rev. C 99, 034601 (2019) R.Lewis, S.N.Liddick, A.C.Larsen, A.Spyrou, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, M.Guttormsen, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem Experimental constraints on the 73Zn(n, γ)74Zn reaction rate RADIOACTIVITY 74Cu(β-)[74Cu ions from Be(86Kr, X), E=140 MeV/nucleon reaction and using A1900 separator at NSCL-MSU facility]; measured β particles, Eγ, Iγ, βγ-coin, half-life of 74Cu decay using the Summing NaI detector for total absorption spectroscopy (TAS); deduced nuclear level density (NLD), and γ strength function (γSF) using the β-Oslo method, distribution of spins for levels in 74Zn around S(n). Comparison with previous experimental results, and with theoretical calculations using TALYS code. Results used to deduce σ for 73Zn(n, γ) reaction. NUCLEAR REACTIONS 73Zn(n, γ), E=0.01-1 MeV; deduced σ(E), and astrophysical reaction rates using the experimental NLD and γSF. Comparison with Hauser-Feshbach statistical model calculations using TALYS code.
doi: 10.1103/PhysRevC.99.034601
2019LI35 Phys.Rev. C 100, 024624 (2019) S.N.Liddick, A.C.Larsen, M.Guttormsen, A.Spyrou, B.P.Crider, F.Naqvi, J.E.Midtbo, F.L.Bello Garrote, D.L.Bleuel, L.Crespo Campo, A.Couture, A.C.Dombos, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, R.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking, F.Zeiser Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method RADIOACTIVITY 51Sc(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin; deduced level density, γ-strength function. Measurement was performed at NSCL using the Summing NaI(Tl) detector SuN, used as a TAS. NUCLEAR REACTIONS 50Ti(d, p)51Ti, E=12.5 MeV; measured Ep, Ip, Eγ, Iγ, γp-coin; deduced nuclear level density (NLD), γ strength function (γSF). Measurement was performed at the Oslo Cyclotron Laboratory, Sweden using the CACTUS NaI scintillator array.
doi: 10.1103/PhysRevC.100.024624
2019LY02 Phys.Rev. C 100, 025806 (2019) S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, M.R.Mumpower, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn 69, 71Co β-decay strength distributions from total absorption spectroscopy RADIOACTIVITY 69,71Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by in flight separation of fragments by the A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, Eβ, βγ-coin, half-lives of decays of 69,71Co decays, total absorption spectra using Summing NaI(Tl) (SuN) detector for γ rays and double-sided silicon strip detector (DSSD) for β; deduced cumulative Iβ distributions and compared to QRPA and Skyrme QRPA calculations, Gamow-Teller (GT) strength distribution. Comparison of decay half-lives with ENSDF values, and theoretical calculations using shell mode, QRPA and Skyrme QRPA. Relevance to r process in nucleosynthesis.
doi: 10.1103/PhysRevC.100.025806
2019MA20 Phys.Lett. B 791, 403 (2019) K.L.Malatji, M.Wiedeking, S.Goriely, C.P.Brits, B.V.Kheswa, F.L.Bello Garrote, D.L.Bleuel, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, M.Klintefjord, A.C.Larsen, P.Papka, T.Renstrom, E.Sahin, S.Siem, L.Siess, G.M.Tveten, F.Zeiser Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates NUCLEAR REACTIONS 180,181,182Ta(n, γ), E ∼ 30 keV; analyzed available data on the nuclear level densities and γ-ray strength functions below the neutron thresholds; calculated σ, reaction rates; deduced s- and p-process nucleosynthesis results.
doi: 10.1016/j.physletb.2019.03.013
2019UT01 Phys.Rev. C 99, 024609 (2019) H.Utsunomiya, T.Renstrom, G.M.Tveten, S.Goriely, T.Ari-izumi, D.Filipescu, J.Kaur, Y.-W.Lui, W.Luo, S.Miyamoto, A.C.Larsen, S.Hilaire, S.Peru, A.J.Koning γ-ray strength function for thallium isotopes relevant to the 205Pb - 205Tl chronometry NUCLEAR REACTIONS 203,205Tl(γ, n), E=7.9-13.0 MeV; measured E(n), I(n), σ(E) using 4π 3He proportional counter array for neutron detection at NewSUBARU synchrotronic radiation facility; deduced GDR parameters and γ-ray strength function (γSF), the latter on the basis of the Hartree-Fock-Bogolyubov plus quasiparticle random-phase approximation using the Gogny D1M interaction for E1 and M1 components with the zero-limit correction (QRPA+D1M+0lim). 203,205Tl(n, γ), Eγ=0.001-4 MeV; calculated σ(E) with the D1M+QRPA+0lim, and compared with available experimental results. 204Tl(n, γ), T=0-1 GK; calculated Maxwellian averaged σ(E) (MACS) with the D1M+QRPA+0lim strength function, and compared with experimental results, and recommended σ in compilations by Bao et al.
doi: 10.1103/PhysRevC.99.024609
2019UT02 Phys.Rev. C 100, 034605 (2019) H.Utsunomiya, T.Renstrom, G.M.Tveten, S.Goriely, T.Ari-izumi, V.W.Ingeberg, B.V.Kheswa, Y.-W.Lui, S.Miyamoto, S.Hilaire, S.Peru, A.J.Koning γ-ray strength function for barium isotopes NUCLEAR REACTIONS 137Ba(γ, n)136Ba, E=7-13 MeV; 138Ba(γ, n)137Ba, E=8.75-13 MeV from laser Compton scattering at the NewSUBARU synchrotron radiation facility at the University of Hyogo; measured En, In; deduced σ(E), E1 and M1 γ-strength functions; σ(E) compared to TALYS calculations. The photoneutron data used to constrain the γ strength function on the basis of the Hartree-Fock-Bogolyubov plus quasiparticle random phase approximation using the Gogny D1M interaction. Comparison with previous experimental data. 131,133Ba(n, γ), kT=30 keV; estimated Maxwellian-averaged cross sections.
doi: 10.1103/PhysRevC.100.034605
2019VO05 Phys.Rev. C 99, 054609 (2019) A.V.Voinov, T.Renstrom, D.L.Bleuel, S.M.Grimes, M.Guttormsen, A.C.Larsen, S.N.Liddick, G.Perdikakis, A.Spyrou, S.Akhtar, N.Alanazi, K.Brandenburg, C.R.Brune, T.W.Danley, S.Dhakal, P.Gastis, R.Giri, T.N.Massey, Z.Meisel, S.Nikas, S.N.Paneru, C.E.Parker, A.L.Richard Level densities of 74, 76Ge from compound nuclear reactions NUCLEAR STRUCTURE 68,70Zn(7Li, p), E=16 MeV; measured evaporated proton spectra from 2-25 MeV, σ, yields using silicon ΔE-E telescope at the Edwards tandem accelerator laboratory, Athens, Ohio. 74,76Ge; deduced nuclear level densities. Comparison with theoretical calculations using coupled-channel model of the EMPIRE code, GCM-RIPL-global, and BSFG-RIPL-global density models.
doi: 10.1103/PhysRevC.99.054609
2018BE10 Phys.Rev. C 97, 064310 (2018) F.L.Bello Garrote, A.Gorgen, C.Mihai, T.Abraham, L.Crespo Campo, J.-P.Delaroche, D.Filipescu, N.M.Florea, I.Gheorghe, D.G.Ghita, M.Girod, T.Glodariu, K.Hadynska-Klek, M.Klintefjord, J.Libert, R.Lica, T.Marchlewski, N.Marginean, R.Marginean, I.Mitu, A.Negret, C.R.Nita, F.Nowacki, A.Olacel, S.Pascu, T.Renstrom, E.Sahin, S.Siem, J.Srebrny, A.Stolarz, L.Stroe, S.Toma, T.G.Tornyi, A.Tucholski Lifetime measurements in 138Nd NUCLEAR REACTIONS 123Sb(19F, 4n), E=68 MeV; measured Eγ, Iγ, γγ-coin, half-lives of excited levels by recoil-distance Doppler shift technique using the ROSPHERE array at IFIN-HH, Bucharest. 138Nd; deduced levels, J, π, B(E1), B(E2), configurations; calculated Potential energy surface (PES) for the ground-state. Comparison with large-scale shell model, and constrained Hartree-Fock-Bogoliubov calculations with the Gogny D1S interaction. Discussed onset of collectivity in Nd isotopes below the N=82 shell closure from B(E2) systematics in 132,134,136,138,140Nd, 136Ce, 140,142Sm.
doi: 10.1103/PhysRevC.97.064310
2018CR05 Phys.Rev. C 98, 054303 (2018) L.Crespo Campo, M.Guttormsen, F.L.Bello Garrote, T.K.Eriksen, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, M.Klintefjord, A.C.Larsen, T.Renstrom, E.Sahin, S.Siem, A.Springer, T.G.Tornyi, G.M.Tveten Test of the generalized Brink-Axel hypothesis in 64, 65Ni NUCLEAR REACTIONS 64Ni(p, p'γ), E=16 MeV; 64Ni(d, p), E=12.5 MeV; analyzed experimental data for pγ-coin, and dγ-coin data, reported in authors' previous publications 2016Cr04 and 2017Cr04; also analyzed the role of Porter-Thomas fluctuations as a function of excitation and γ-ray energies. 64,65Ni; deduced γ strength functions (γSF) for various initial excitation energies, and role of fluctuations in the γ strength functions. Discussed validity of generalized Brink-Axel (gBA) hypothesis.
doi: 10.1103/PhysRevC.98.054303
2018LA07 Phys.Rev. C 97, 054329 (2018) A.C.Larsen, J.E.Midtbo, M.Guttormsen, T.Renstrom, S.N.Liddick, A.Spyrou, S.Karampagia, B.A.Brown, O.Achakovskiy, S.Kamerdzhiev, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, R.Lewis, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, S.Siem Enhanced low-energy γ-decay strength of 70Ni and its robustness within the shell model RADIOACTIVITY 70Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon followed by fragment separation using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, summed γ energies, β-γ-coin using double-sided silicon strip detector (DSSD) for electrons placed in the center of the Summing NaI (SuN) total absorption spectrometer for γ radiation. 70Ni; deduced nuclear level density (NLD) and γ-strength function (γSF) using β-Oslo method. Comparison with previous experimental results, and with HFB+c calculations. NUCLEAR STRUCTURE 70Ni; calculated levels, J, π, B(E2), level densities, γSF, summed γSF, and M1 γ strengths for A=56-76 Ni isotopes. Quasiparticle time-blocking approximation and large-scale shell-model calculations with CA48MH1G and JUN45 interactions. Comparison with experimental results.
doi: 10.1103/PhysRevC.97.054329
2018MI22 Phys.Rev. C 98, 064321 (2018) J.E.Midtbo, A.C.Larsen, T.Renstrom, F.L.Bello Garrote, E.Lima Consolidating the concept of low-energy magnetic dipole decay radiation NUCLEAR STRUCTURE 60,61,62,63,64,65,66,67,68Ga, 69,70,71,72,73,74,75,76,77,78,79,80Ga, 59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75Ni, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76Cu, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78Zn, 60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81Ge, 61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81As, 78,79,80,81,82Se, 21,22,23,24,25,26,27,28,29,30,31,32,33Al, 16,17,18,19,20,21,22,23,24,25,26O, 18,19,20,21,22,23,24,25,26,27,28F, 18,19,20,21,22,23,24,25,26,27,28,29,30Ne, 19,20,21,22,23,24,25,26,27,28,29,30,31Na, 20,21,22,23,24,25,26,27,28,29,30,31,32Mg, 22,23,24,25,26,27,28,29,30,31,32,33,34Si, 23,24,25,26,27,28,29,30,31,32,33,34,35P, 24,25,26,27,28,29,30,31,32,33,34,35,36S, 25,26,27,28,29,30,31,32,33,34,35,36,37Cl, 26,27,28,29,30,31,32,33,34,35,36,37,38Ar, 44Sc, 56Fe, 37K; calculated M1 γ-ray strength functions for 283 nuclei, low-energy enhancements (LEE), total dipole (E1 and M1) strength for 44Sc and 29Si using large-scale shell model. Comparison with experimental data from the Oslo method.
doi: 10.1103/PhysRevC.98.064321
2018RE15 Phys.Rev. C 98, 054310 (2018) T.Renstrom, H.Utsunomiya, H.T.Nyhus, A.C.Larsen, M.Guttormsen, G.M.Tveten, D.M.Filipescu, I.Gheorghe, S.Goriely, S.Hilaire, Y.-W.Lui, J.E.Midtbo, S.Peru, T.Shima, S.Siem, O.Tesileanu Verification of detailed balance for γ absorption and emission in Dy isotopes NUCLEAR REACTIONS 162,163Dy(γ, n), E=6.4-13.5 MeV laser Compton backscattered γ-ray beam; measured neutron spectra, and σ(E) using 4π 3He proportional counter array for neutron detection at the NewSUBARU synchrotronic radiation facility; deduced renormalized nuclear level densities (NLD), γ-strength functions (γSF). 160,161,162,163,164Dy; deduced γ strength functions, nuclear level densities, E1 γ strength function, and M1 scissors resonance σ, centroids, widths, B(M1). 159,160,161,162,163Dy(n, γ), E=0.001-1 MeV; calculated σ(E) with TALYS-1.8 code, and compared to previous experimental data. 160,161,162,163,164Dy(3He, α), (3He, 3He'), E*<8 MeV; analyzed previous experimental data; deduced level densities.
doi: 10.1103/PhysRevC.98.054310
2018UT03 Phys.Rev. C 98, 054619 (2018) H.Utsunomiya, T.Renstrom, G.M.Tveten, S.Goriely, S.Katayama, T.Ari-izumi, D.Takenaka, D.Symochko, B.V.Kheswa, V.W.Ingeberg, T.Glodariu, Y.-W.Lui, S.Miyamoto, A.C.Larsen, J.E.Midtbo, A.Gorgen, S.Siem, L.Crespo Campo, M.Guttormsen, S.Hilaire, S.Peru, A.J.Koning Photoneutron cross sections for Ni isotopes: Toward understanding (n, γ) cross sections relevant to weak s-process nucleosynthesis NUCLEAR REACTIONS 58,60,61,64Ni(γ, n), E=8.00-22.02 MeV; measured E(n), I(n), σ(E) using 3He proportional counters for neutrons and LaBr3(Ce) detector for γ-flux at NewSUBARU synchrotron radiation facility; deduced γ-ray strength functions (γSF); compared σ(E) with previous experimental data, and with TALYS predictions. 58,60,63,64(n, γ), E=0.01-10 MeV; calculated radiative σ(E) and Maxwellian averaged σ (MACS) in terms of the experimentally constrained γ-ray strength functions from the Hartree-Fock-Bogolyubov plus quasiparticle-random-phase approximation (HFB+QRPA) based on the Gogny D1M interaction for E1 and M1 components, supplemented with the M1 upbend. Relevance to the s-process nucleosynthesis, and radioactive nuclei at the s-process branching points.
doi: 10.1103/PhysRevC.98.054619
2017CR04 Phys.Rev. C 96, 014312 (2017) L.Crespo Campo, A.C.Larsen, F.L.Bello Garrote, T.K.Eriksen, F.Giacoppo, A.Gorgen, M.Guttormsen, M.Klintefjord, T.Renstrom, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten Investigating the γ decay of 65Ni from particle-γ coincidence data NUCLEAR REACTIONS 64Ni(d, p)65Ni, E=12.5 MeV; measured charged particle spectra Eγ, Iγ, (particle)γ-coin using the Silicon Ring (SiRi) array for particle detection, and CACTUS array of 26 collimated NaI(Tl) detectors for γ detection at Oslo Cyclotron Laboratory (OCL). 65Ni; deduced levels, resonance-like structure centered at ≈4.6 MeV, nuclear level density (NLD) using the constant temperature (CT) and the backshifted Fermi gas (BSFG) models, and the γ-strength function (γSF). Comparison with previous experimental studies.
doi: 10.1103/PhysRevC.96.014312
2017GU21 Phys.Rev. C 96, 024313 (2017) M.Guttormsen, S.Goriely, A.C.Larsen, A.Gorgen, T.W.Hagen, T.Renstrom, S.Siem, N.U.H.Syed, G.Tagliente, H.K.Toft, H.Utsunomiya, A.V.Voinov, K.Wikan Quasicontinuum γ decay of 91, 92Zr: Benchmarking indirect (n, γ) cross section measurements for the s process NUCLEAR REACTIONS 92Zr(p, d), E=28 MeV; 92Zr(p, p'), E=17 MeV; measured E(p), I(p), E(d), I(d), Eγ, Iγ, (particle)γ-coin, γ-ray multiplicity measured using SiRi array of silicon telescopes for charged particles and CACTUS array of NaI(Tl) detectors for γ rays at Oslo Cyclotron laboratory (OCL). 91,92Zr; deduced levels, J, π, nuclear level densities (NLDs), E1 and M1 γ-ray strength functions (γSF), l=0 resonances. 90,91Zr(n, γ), E=0.001-1 MeV and kT<0.11 MeV; deduced σ(E) and Maxwellian-averaged cross sections using TALYS code on the basis of the experimental NLDs and γSF in the present work, and compared with available experimental data.
doi: 10.1103/PhysRevC.96.024313
2017KH08 Phys.Rev. C 95, 045805 (2017) B.V.Kheswa, M.Wiedeking, J.A.Brown, A.C.Larsen, S.Goriely, M.Guttormsen, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, T.K.Eriksen, F.Giacoppo, A.Gorgen, B.L.Goldblum, T.W.Hagen, P.E.Koehler, M.Klintefjord, K.L.Malatji, J.E.Midtbo, H.T.Nyhus, P.Papka, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi 137, 138, 139La (n, γ) cross sections constrained with statistical decay properties of 138, 139, 140La nuclei NUCLEAR REACTIONS 139La(3He, α), (3He, 3He'), E=38 MeV; 139La(d, p), E=13.5 MeV; measured α, 3He and proton spectra, Eγ, Iγ, αγ-, (3He)γ-, and pγ-coin using SiRi array for particles and CACTUS array for γ rays. 138,139,140La; deduced nuclear level densities (NLDs)and γ-ray strength functions (γSF). Comparison with previous experimental data, and with microscopic calculations using HFB+Comb, Fermi gas (BSFG1+CT) and BSFG2+CT models. 137,138,139La(n, γ), E=0.001-1 MeV; calculated σ(E) with the TALYS reaction code using the measured NLDs and γSFs as inputs, and compared to available experimental data.
doi: 10.1103/PhysRevC.95.045805
2017LA06 J.Phys.(London) G44, 064005 (2017) A.C.Larsen, M.Guttormsen, N.Blasi, A.Bracco, F.Camera, L.Crespo Campo, T.K.Eriksen, A.Gorgen, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, S.Leoni, J.E.Midtbo, B.Million, H.T.Nyhus, T.Renstrom, S.J.Rose, I.E.Ruud, S.Siem, T.G.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking, F.Zeiser Low-energy enhancement and fluctuations of γ-ray strength functions in 56, 57Fe: test of the Brink-Axel hypothesis NUCLEAR REACTIONS 56,57Fe(p, pγ), E=16 MeV; measured reaction products, Ep, Ip, Eγ, Iγ; deduced level densities, γ-ray strength functions.
doi: 10.1088/1361-6471/aa644a
2017RO16 Phys.Rev. C 96, 014601 (2017) S.J.Rose, F.Zeiser, J.N.Wilson, A.Oberstedt, S.Oberstedt, S.Siem, G.M.Tveten, L.A.Bernstein, D.L.Bleuel, J.A.Brown, L.Crespo Campo, F.Giacoppo, A.Gorgen, M.Guttormsen, K.Hadynska, A.Hafreager, T.W.Hagen, M.Klintefjord, T.A.Laplace, A.C.Larsen, T.Renstrom, E.Sahin, C.Schmitt, T.G.Tornyi, M.Wiedeking Energy dependence of the prompt γ-ray emission from the (d, p) -induced fission of 234U* and 240Pu* NUCLEAR REACTIONS 233U(d, pF)234U*, E=12.5 MeV; 239Pu(d, pF)239Pu*, E=12 MeV; measured protons, fission fragments, Eγ, p(one of the fission fragments)γ-coin using CACTUS array for γ detection, SiRi detector array for charged-particles and NIFF detector for fission fragments at Oslo Cyclotron Laboratory (OCL); deduced prompt-fission γ-ray spectral (PFGS) distributions, multiplicity, average γ-ray energy, and total γ-ray energy as function of excitation energy. Comparison with model calculations using the fission model code GEF.
doi: 10.1103/PhysRevC.96.014601
2017SP03 J.Phys.(London) G44, 044002 (2017) A.Spyrou, A.C.Larsen, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, M.Guttormsen, D.L.Bleuel, A.Couture, L.Crespo Campo, R.Lewis, S.Mosby, M.R.Mumpower, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem, R.Surman Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni RADIOACTIVITY 69Co(β-); measured decay products, Eγ, Iγ; deduced the γ-ray strength function and the nuclear level density, T1/2. Comparison with available data.
doi: 10.1088/1361-6471/aa5ae7
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
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
2016CR04 Phys.Rev. C 94, 044321 (2016) L.Crespo Campo, F.L.Bello Garrote, T.K.Eriksen, A.Gorgen, M.Guttormsen, K.Hadynska-Klek, M.Klintefjord, A.C.Larsen, T.Renstrom, E.Sahin, S.Siem, A.Springer, T.G.Tornyi, G.M.Tveten Statistical γ-decay properties of 64Ni and deduced (n, γ) cross section of the s-process branch-point nucleus 63Ni NUCLEAR REACTIONS 64Ni(p, p'γ), E=16 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin using SiRi particle-detector system and the CACTUS γ-detection array at Oslo Cyclotron Laboratory; deduced γ-strength function, and nuclear level density by Oslo method. 63Ni(n, γ), E=10 keV to 3 MeV; calculated σ(E) and MACs with TALYS using the level density and γ-strength function in the present work, and comparison with experimental results.
doi: 10.1103/PhysRevC.94.044321
2016DU18 Phys.Rev. C 94, 024614 (2016) Q.Ducasse, B.Jurado, M.Aiche, P.Marini, L.Mathieu, A.Gorgen, M.Guttormsen, A.C.Larsen, T.Tornyi, J.N.Wilson, G.Barreau, G.Boutoux, S.Czajkowski, F.Giacoppo, F.Gunsing, T.W.Hagen, M.Lebois, J.Lei, V.Meot, B.Morillon, A.M.Moro, T.Renstrom, O.Roig, S.J.Rose, O.Serot, S.Siem, I.Tsekhanovich, G.M.Tveten, M.Wiedeking Investigation of the 238U (d, p) surrogate reaction via the simultaneous measurement of γ-decay and fission probabilities NUCLEAR REACTIONS 238U(d, p)239U*, E=15 MeV; measured particle spectra Eγ, Iγ, (proton)γ- and (proton)(fission events)-coin using ΔE/E silicon telescope SiRi for particles and CACTUS array for γ rays at Oslo Cyclotron Laboratory; corrected data using continuum-discretized coupled channels calculations for elastic breakup, and DWBA for inelastic breakup; deduced excitation energy of 239U versus detected γ-ray energy, ratio between the γ-coincidence and the singles spectra, average angular momentum, γ-decay and fission probabilities as function of excitation energy and compared with JENDL 4.0, ENDF-B/VII.1 and JEFF 3.2 evaluated libraries, and corresponding neutron-induced data; calculated contributions to the total deuteron breakup process (TB) as a function of the excitation energy of 239U. Statistical model calculations for decay probabilities and average angular momentum.
doi: 10.1103/PhysRevC.94.024614
2016GU03 Phys.Rev.Lett. 116, 012502 (2016) M.Guttormsen, A.C.Larsen, A.Gorgen, T.Renstrom, S.Siem, T.G.Tornyi, G.M.Tveten Validity of the Generalized Brink-Axel Hypothesis in 238Np NUCLEAR REACTIONS 237Np(d, pγ), E not given; analyzed available data; deduced Eγ, Iγ, γ-ray strengths, the validity of generalized Brink-Axel hypothesis.
doi: 10.1103/PhysRevLett.116.012502
2016KL05 Phys.Rev. C 93, 054303 (2016) M.Klintefjord, K.Hadynska-Klek, A.Gorgen, C.Bauer, F.L.Bello Garrote, S.Bonig, B.Bounthong, A.Damyanova, J.-P.Delaroche, V.Fedosseev, D.A.Fink, F.Giacoppo, M.Girod, P.Hoff, N.Imai, W.Korten, A.-C.Larsen, J.Libert, R.Lutter, B.A.Marsh, P.L.Molkanov, H.Naidja, P.Napiorkowski, F.Nowacki, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, S.Rothe, M.D.Seliverstov, B.Siebeck, S.Siem, J.Srebrny, T.Stora, P.Thole, T.G.Tornyi, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, H.De Witte, M.Zielinska Structure of low-lying states in 140Sm studied by Coulomb excitation NUCLEAR REACTIONS 94Mo(140Sm, 140Sm'), (140Sm, 94Mo'), E=2.85 MeV/nucleon, [secondary 140Sm beam from Ta(p, X), E=1.4 GeV reaction at ISOLDE-CERN using RILIS, REXTRAP and EBIS]; measured scattered 140Sm and 94Mo particles, Eγ, Iγ, (particle)γ-coin, γ-yields using MINIBALL array for γ rays and DSSSD detectors for particle detection, γ spectra with laser on and off, γ-ray angular distributions. 140Sm; deduced E2 matrix elements, B(E2), spectroscopic quadrupole moment for the first two 2+ and the first 4+ states using coupled channel code GOSIA and normalized to γ-ray yield for first 2+ state in 94Mo target, and to known half-life for the first 2+ in 140Sm. Comparison with theoretical calculations using beyond-mean-field model with Gogny D1S interaction, shell model, interacting boson approximation (IBA), and E(5) symmetry. Calculated potential energy surface in (β, γ) plane for 140Sm. 95Mo; measured Iγ yield for 3/2+ to 5/2+ ground-state transition.
doi: 10.1103/PhysRevC.93.054303
2016LA02 Phys.Rev. C 93, 014323 (2016); Pub.Note Phys.Rev. C 100, 039901 (2019) T.A.Laplace, F.Zeiser, M.Guttormsen, A.C.Larsen, D.L.Bleuel, L.A.Bernstein, B.L.Goldblum, S.Siem, F.L.Bello Garotte, J.A.Brown, L.C.Campo, T.K.Eriksen, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, R.A.Henderson, M.Klintefjord, M.Lebois, T.Renstrom, S.J.Rose, E.Sahin, T.G.Tornyi, G.M.Tveten, A.Voinov, M.Wiedeking, J.N.Wilson, W.Younes Statistical properties of 243Pu, and 242Pu(n, γ) cross section calculation NUCLEAR REACTIONS 242Pu(d, p), E=12 MeV; measured Eγ, particle spectra, (particle)γ-coin using CACTUS γ-spectrometer and SiRi (Silicon Ring) for particle detection at Oslo Cyclotron Laboratory; deduced γ-strength functions (γSF) in the quasicontinuum using the Oslo method, level density, centroid energy, strength and γSF of M1-scissors resonance, sum-rule estimates. 242Pu(n, γ), E=0.001-5 MeV; calculated σ(n, γ) using TALYS and level density and γSF parameters from the present work. Comparison with published data, and ENDF/B-VII.1, JENDL-4.0 and TENDL2014.
doi: 10.1103/PhysRevC.93.014323
2016LA11 Phys.Rev. C 93, 045810 (2016) A.C.Larsen, M.Guttormsen, R.Schwengner, D.L.Bleuel, S.Goriely, S.Harissopulos, F.L.Bello Garrote, Y.Byun, T.K.Eriksen, F.Giacoppo, A.Gorgen, T.W.Hagen, M.Klintefjord, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking Experimentally constrained (p, γ)89Y and (n, γ)59Y reaction rates relevant to p-process nucleosynthesis NUCLEAR REACTIONS 89Y(p, p'γ), E=17 MeV; measured E(p), I(p), Eγ, Iγ, γ(θ), pγ-coin using silicon ring (SiRi) array for protons and CACTUS array for γ rays at OSLO cyclotron facility; deduced level density, normalized γ-strength function (γSF) of 89Y, enhancement of γSF due to strong, low-energy M1 transitions at high excitation energies. Comparison with shell-model calculations. 88Sr(p, γ)89Y, E=1.5-5 MeV; 88Y(n, γ)89Y, E=0.01-1.5 MeV; deduced cross sections and astrophysical reaction rates using present data and TALYS code. Comparison of cross-section data with values from the BRUSLIB library. Relevance to p-process nucleosynthesis.
doi: 10.1103/PhysRevC.93.045810
2016LI30 Phys.Rev.Lett. 116, 242502 (2016) S.N.Liddick, A.Spyrou, B.P.Crider, F.Naqvi, A.C.Larsen, M.Guttormsen, M.Mumpower, R.Surman, G.Perdikakis, D.L.Bleuel, A.Couture, L.C.Campo, A.C.Dombos, R.Lewis, S.Mosby, S.Nikas, C.J.Prokop, T.Renstrom, B.Rubio, S.Siem, S.J.Quinn Experimental Neutron Capture Rate Constraint Far from Stability RADIOACTIVITY 70Co(β-) [from 9Be(86Kr, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced nuclear level density as a function of excitation energy. Comparison with available data. NUCLEAR REACTIONS 69Ni(n, γ), E<10 GK; calculated nuclear reaction capture rates using experimental level densities and code TALYS.
doi: 10.1103/PhysRevLett.116.242502
2016NE08 Phys.Rev. C 94, 024332 (2016) D.Negi, M.Wiedeking, E.G.Lanza, E.Litvinova, A.Vitturi, R.A.Bark, L.A.Bernstein, D.L.Bleuel, S.Bvumbi, T.D.Bucher, B.H.Daub, T.S.Dinoko, J.L.Easton, A.Gorgen, M.Guttormsen, P.Jones, B.V.Kheswa, N.A.Khumalo, A.C.Larsen, E.A.Lawrie, J.J.Lawrie, S.N.T.Majola, L.P.Masiteng, M.R.Nchodu, J.Ndayishimye, R.T.Newman, S.P.Noncolela, J.N.Orce, P.Papka, L.Pellegri, T.Renstrom, D.G.Roux, R.Schwengner, O.Shirinda, S.Siem Nature of low-lying electric dipole resonance excitations in 74Ge NUCLEAR REACTIONS 74Ge(α, α'), E=48 MeV; measured Eγ, Iγ, Eα, αγ-coin, γ(θ), σ(θ) for scattered α particles, relative cross sections of E1 transitions using AFRODITE array for γ detection and silicon detectors for α particles at iThemba Labs cyclotron facility. 74Ge; deduced levels, J, π, B(E1), suppression in relative cross section for the excitation of pygmy-dipole resonances (PDR) as compared to those in (γ, γ') data for excitations above 6 MeV. Comparison of B(E1) with relativistic quasiparticle time blocking approximation (RQTBA) calculations.
doi: 10.1103/PhysRevC.94.024332
2016RE13 Phys.Rev. C 93, 064302 (2016) T.Renstrom, H.-T.Nyhus, H.Utsunomiya, R.Schwengner, S.Goriely, A.C.Larsen, D.M.Filipescu, I.Gheorghe, L.A.Bernstein, D.L.Bleuel, T.Glodariu, A.Gorgen, M.Guttormsen, T.W.Hagen, B.V.Kheswa, Y.-W.Lui, D.Negi, I.E.Ruud, T.Shima, S.Siem, K.Takahisa, O.Tesileanu, T.G.Tornyi, G.M.Tveten, M.Wiedeking Low-energy enhancement in the γ-ray strength functions of 73, 74Ge NUCLEAR REACTIONS 74Ge(3He, 3He), (3He, α), E=38 MeV; measured Eγ, Iγ, (particle)γ-coin using SiRi particle detector array and CACTUS array for γ detection at Oslo Cyclotron Laboratory (OCL) facility. 74Ge(γ, n), E=10.4-12.7 MeV; measured E(n), I(n), σ(E) using 4π neutron detection array at NewSUBARU synchrotron radiation facility. 73,74Ge, deduced γ-strength functions (γSF), nuclear level densities (NLD). Comparison with shell-model calculations. 72,73Ge(n, γ), E=0.001-3 MeV; deduced experimentally constrained σ(E), and compared with TALYS calculations for E1 and M1 radiations.
doi: 10.1103/PhysRevC.93.064302
2016SP04 Phys.Rev.Lett. 117, 142701 (2016) A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, M.R.Mumpower, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, S.J.Quinn, S.Valenta Strong Neutron-γ Competition above the Neutron Threshold in the Decay of 70Co RADIOACTIVITY 70Co(β-) [9Be(86Kr, X)70Co, E=140 MeV/nucleon]; measured decay products, Eβ, Iβ, Eγ, Iγ; deduced β-decay intensity, the large fragmentation of the β intensity at high energies, as well as the strong competition between γ-rays and neutrons. Comparison with shell model calculations.
doi: 10.1103/PhysRevLett.117.142701
2016TV01 Phys.Rev. C 94, 025804 (2016) G.M.Tveten, A.Spyrou, R.Schwengner, F.Naqvi, A.C.Larsen, T.K.Eriksen, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, L.Crespo Campo, M.Guttormsen, F.Giacoppo, A.Gorgen, T.W.Hagen, K.Hadynska-Klek, M.Klintefjord, B.S.Meyer, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi Completing the nuclear reaction puzzle of the nucleosynthesis of 92Mo NUCLEAR REACTIONS 92Mo(p, p'), E=16.5 MeV; measured Ep, Ip, Eγ, Iγ pγ-coin, angular distributions using SiRi silicon ΔE-E telescopes for protons and CACTUS scintillator detector array for γ rays at Oslo Cyclotron Laboratory; deduced nuclear level density (NLD) and γ-strength function (γSF) of 92Mo. 91Nb(p, γ)92Mo, T9=1.8-3.5; deduced astrophysical reaction rates using TALYS 1.6 code and NLD and γSF input from present experiment; discussed puzzle of the nucleosynthesis of 92Mo in the context of p process. Comparison with previous experimental results from 92Mo(γ, γ') and 92,94,95,96Mo(γ, n) reactions, and shell model calculations.
doi: 10.1103/PhysRevC.94.025804
2015GI02 Phys.Rev. C 91, 054327 (2015) F.Giacoppo, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, R.B.Firestone, A.Gorgen, M.Guttormsen, T.W.Hagen, M.Klintefjord, P.E.Koehler, A.C.Larsen, H.T.Nyhus, T.Renstrom, E.Sahin, S.Siem, T.Tornyi γ decay from the quasicontinuum of 197, 198Au NUCLEAR REACTIONS 197Au(d, p), E=12.5 MeV; 197Au(3He, 3He'), E=34.0 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using CACTUS spectrometer for γ rays and SiRi (Silicon Ring) for particle detection at Oslo Cyclotron Laboratory; deduced γ strength functions, level density, spin cutoff distributions as function of excitation energy, σ(E) for 197Au(n, γ). Comparison with (γ, n) experimental results, and with theoretical calculations using EGLO model with four SLO components, and QRPA.
doi: 10.1103/PhysRevC.91.054327
2015GU27 Eur.Phys.J. A 51, 170 (2015) M.Guttormsen, M.Aiche, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, Y.Byun, Q.Ducasse, T.K.Eriksen, F.Giacoppo, A.Gorgen, F.Gunsing, T.W.Hagen, B.Jurado, M.Klintefjord, A.C.Larsen, L.Lebois, B.Leniau, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.G.Tornyi, G.M.Tveten, A.Voinov, M.Wiedeking, J.Wilson Experimental level densities of atomic nuclei
doi: 10.1140/epja/i2015-15170-4
2015KH02 Phys.Lett. B 744, 268 (2015) B.V.Kheswa, M.Wiedeking, F.Giacoppo, S.Goriely, M.Guttormsen, A.C.Larsen, F.L.Bello Garrote, T.K.Eriksen, A.Gorgen, T.W.Hagen, P.E.Koehler, M.Klintefjord, H.T.Nyhus, P.Papka, T.Renstrom, S.Rose, E.Sahin, S.Siem, T.Tornyi Galactic production of 138La: Impact of 138, 139La statistical properties NUCLEAR REACTIONS 139La(3He, X)138La/139La, E=38 MeV; measured reaction products, Eγ, Iγ; deduced σ, γ-ray strength functions, nuclear level densities, Maxwellian-averaged σ. Comparison with available data.
doi: 10.1016/j.physletb.2015.03.065
2015KL01 Acta Phys.Pol. B46, 607 (2015) M.Klintefjord, K.Hadynska-Klek, J.Samorajczyk, A.Gorgen, Ch.Droste, J.Srebrny, T.Abraham, C.Bauer, F.L.Bello Garrote, S.Bonig, A.Damyanova, F.Giacoppo, E.Grodner, P.Hoff, M.Kisielinski, M.Komorowska, W.Korten, M.Kowalczyk, J.Kownacki, A.C.Larsen, R.Lutter, T.Marchlewski, P.Napiorkowski, J.Pakarinen, E.Rapisarda, P.Reiter, T.Renstrom, B.Siebeck, S.Siem, A.Stolarz, R.Szenborn, P.Thole, T.Tornyi, A.Tucholski, G.M.Tveten, P.Van Duppen, M.J.Vermeulen, N.Warr, H.De Witte, M.Zielinska Spectroscopy of Low-lying States in 140Sm NUCLEAR REACTIONS 94Mo(140Sm, 140Sm'), E=2.85 MeV/nucleon; measured reaction products, Eγ, Iγ. 140Sm; deduced energy levels, J, π, angular correlation coefficients, B(E2). GOSIA analysis.
doi: 10.5506/APhysPolB.46.607
2015LA08 Acta Phys.Pol. B46, 509 (2015) A.C.Larsen, S.Goriely, L.A.Bernstein, D.L.Bleuel, A.Bracco, B.A.Brown, F.Camera, T.K.Eriksen, S.Frauendorf, F.Giacoppo, M.Guttormsen, A.Gorgen, S.Harissopulos, S.Leoni, S.N.Liddick, F.Naqvi, H.T.Nyhus, S.J.Rose, T.Renstrom, R.Schwengner, S.Siem, A.Spyrou, G.M.Tveten, A.V.Voinov, M.Wiedeking Upbend and M1 Scissors Mode in Neutron-rich Nuclei - Consequences for r-process (n, γ) Reaction Rates
doi: 10.5506/APhysPolB.46.509
2015NY01 Phys.Rev. C 91, 015808 (2015) H.-T.Nyhus, T.Renstrom, H.Utsunomiya, S.Goriely, D.M.Filipescu, I.Gheorghe, O.Tesileanu, T.Glodariu, T.Shima, K.Takahisa, S.Miyamoto, Y.-W.Lui, S.Hilaire, S.Peru, M.Martini, L.Siess, A.J.Koning Photoneutron cross sections for neodymium isotopes: Toward a unified understanding of (γ, n) and (n, γ) reactions in the rare earth region NUCLEAR REACTIONS 143,144,145,146,148Nd(γ, n), E=7.55-13.00 MeV laser Compton scattered (LCS) rays; measured neutron spectra, σ(E) at GACKO (Gamma Collaboration Hutch of Konan University) using SUBARU synchrotron radiation facility; deduced σ(E) for 147Nd(n, γ) by combining present (γ, n) data with existing (n, γ) data for 142,143,144,145,146,148Nd(n, γ), and using γ-SF method. Comparison of σ(E) for 147Nd(n, γ) with JENDL-4.0, ENDF/B-VII.1, and ROSFOND-2010 evaluated libraries. Comparison with predictions of Skyrme-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model, and axially symmetric-deformed Gogny HFB plus QRPA model of E1 γ-ray strength using TALYS code. Comparison with previous experimental data.
doi: 10.1103/PhysRevC.91.015808
2014DU11 Nucl.Data Sheets 119, 233 (2014) Q.Ducasse, B.Jurado, M.Aiche, L.Mathieu, T.Tornyi, A.Gorgen, J.N.Wilson, G.Barreau, I.Companis, S.Czajkowski, F.Giacoppo, F.Gunsing, M.Guttormsen, A.C.Larsen, M.Lebois, J.Matarranz, T.Renstrom, S.Rose, S.Siem, I.Tsekhanovich, G.M.Tveten, T.W.Hagen, M.Wiedeking, O.Serot, G.Boutoux, P.Chau, V.Meot, O.Roig Neutron-induced Cross Sections of Actinides via the Surrogate-reaction Method NUCLEAR REACTIONS 238U(d, p), E=15 MeV;238U(3He, t), (3He, α), E=24 MeV; measured ejectiles, fission fragments, coincidences using SiRi detector and PPAC fission detectors, Eγ, Iγ using NaI CACTUS detectors. 238U(n, F), E*=5.55-7.25 MeV; deduced fission probability. 238U(n, γ), E*=4.65-5.9 MeV; deduced γ-decay probability using surrogate method. 238U(n, F), E*=4.8-7.25 MeV; calculated fission probability using TALYS. Preliminary. Fission probability compared with results of Cramer and Britt. Further analysis in progress.
doi: 10.1016/j.nds.2014.08.064
2014ER04 Phys.Rev. C 90, 044311 (2014) T.K.Eriksen, H.T.Nyhus, M.Guttormsen, A.Gorgen, A.C.Larsen, T.Renstrom, I.E.Ruud, S.Siem, H.K.Toft, G.M.Tveten, J.N.Wilson Pygmy resonance and low-energy enhancement in the γ-ray strength functions of Pd isotopes NUCLEAR REACTIONS 106,108Pd(3He, 3He'), (3He, α), E=38 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle telescope and CACTUS γ-detector array at Oslo cyclotron facility. 105,106,107,108Pd; deduced level densities, γ-ray strength functions, pygmy dipole resonances (PDR) at E(-γ)=8 MeV, low-energy enhancement of the strength function for 105Pd as compared to the low-energy tail of the giant dipole resonance (GDR), and neutron number dependency of the PDR strength. Comparison with results from (γ, n) data.
doi: 10.1103/PhysRevC.90.044311
2014FI17 Phys.Rev. C 90, 064616 (2014) D.M.Filipescu, I.Gheorghe, H.Utsunomiya, S.Goriely, T.Renstrom, H.-T.Nyhus, O.Tesileanu, T.Glodariu, T.Shima, K.Takahisa, S.Miyamoto, Y.-W.Lui, S.Hilaire, S.Peru, M.Martini, A.J.Koning Photoneutron cross sections for samarium isotopes: Toward a unified understanding of (γ, n) and (n, γ) reactions in the rare earth region NUCLEAR REACTIONS 144,147,148,149,150,152,154Sm(γ, n), E=6-17 MeV; measured E(n), I(n), monochromatic and nonmonochromatic σ(E). Comparison with previous experimental results, and predictions from Skyrme HFB+QRPA using BSk7 interaction, and axially deformed Gogny HFB+QRPA models using D1M interaction. 147,148,149,150,151,152Sm(n, γ), E=0.001-1 MeV; analyzed measured σ(E) with a TALYS calculation using D1M+QRPA calculation for the E1 strength function. 153Sm(n, γ), E=0.001-1 MeV; predicted σ(E) from TALYS calculations using γ-strength function (γSF) approach. Comparison with evaluated libraries JENDL-4.0, ENDF/B-VII.1, ROSFOND-2010.
doi: 10.1103/PhysRevC.90.064616
2014GI08 Phys.Rev. C 90, 054330 (2014) F.Giacoppo, F.L.Bello Garrote, L.A.Bernstein, D.L.Bleuel, T.K.Eriksen, R.B.Firestone, A.Gorgen, M.Guttormsen, T.W.Hagen, B.V.Kheswa, M.Klintefjord, P.E.Koehler, A.C.Larsen, H.T.Nyhus, T.Renstrom, E.Sahin, S.Siem, T.Tornyi Level densities and thermodynamical properties of Pt and Au isotopes NUCLEAR REACTIONS 195Pt(d, p), (p, p'), (p, d), E=11.3, 16.5 MeV; 197Au(d, p), (d, d'), E=12.5 MeV; 197Au(3He, 3He'), E=34.0 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle detector array and CACTUS multidetector array for γ rays at Oslo cyclotron facility. 194,195,196Pt, 197,198Au; deduced level densities from the population of excited states below S(n), density as function of temperature, single-particle level space for the last unpaired valence neutron, heat capacity and temperature, evidence of consecutive breaking of nucleon Cooper pairs in the heated nuclear system.
doi: 10.1103/PhysRevC.90.054330
2014GU04 Phys.Rev. C 89, 014302 (2014) M.Guttormsen, L.A.Bernstein, A.Gorgen, B.Jurado, S.Siem, M.Aiche, Q.Ducasse, F.Giacoppo, F.Gunsing, T.W.Hagen, A.C.Larsen, M.Lebois, B.Leniau, T.Renstrom, S.J.Rose, T.G.Tornyi, G.M.Tveten, M.Wiedeking, J.N.Wilson Scissors resonance in the quasicontinuum of Th, Pa, and U isotopes NUCLEAR REACTIONS 232Th(d, d'), (d, p), E=12 MeV; 232Th(3He, 3He'), (3He, d), (3He, t), (3He, α), E=24 MeV; 238U(d, d'), (d, p), (d, t), E=15 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi particle telescope and CACTUS γ-detector array at Oslo cyclotron facility. 231,232,233Th, 232,233Pa, 237,238,239U; deduced γ strength functions in the quasicontinuum, low-energy M1 scissors resonance (SR), level densities using Oslo method Comparison with previous (γ, γ') experimental results, and with theoretical model calculations.
doi: 10.1103/PhysRevC.89.014302
2014GU21 Phys.Rev. C 90, 044309 (2014) M.Guttormsen, A.C.Larsen, F.L.Bello Garrote, Y.Byun, T.K.Eriksen, F.Giacoppo, A.Gorgen, T.W.Hagen, M.Klintefjord, H.T.Nyhus, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, T.Tornyi, G.M.Tveten, A.Voinov Shell-gap-reduced level densities in 89, 90Y NUCLEAR REACTIONS 89Y(p, p'), E=17 MeV; 89Y(d, p), E=11 MeV; measured Eγ, Iγ, γγ-coin, particle-γ-coin using CACTUS array at Oslo cyclotron laboratory. 89,90Y; deduced shell-gap-reduced level densities using Oslo method; calculated single-particle orbitals using Nilsson model, proton and neutron quasi-particle energies and pair breaking number, parity asymmetries. Comparison with combinatorial quasiparticle model, and temperature dependent combinatorial model with the D1M Gogny force (TDCG). Systematics of level densities for N=46-56 Sr, Y and Zr nuclei.
doi: 10.1103/PhysRevC.90.044309
2014SP05 Phys.Rev.Lett. 113, 232502 (2014) A.Spyrou, S.N.Liddick, A.C.Larsen, M.Guttormsen, K.Cooper, A.C.Dombos, D.J.Morrissey, F.Naqvi, G.Perdikakis, S.J.Quinn, T.Renstrom, J.A.Rodriguez, A.Simon, C.S.Sumithrarachchi, R.G.T.Zegers Novel technique for Constraining r-Process (n, γ) Reaction Rates RADIOACTIVITY 76Ga(β-) [from Be(76Ge, X), E=130 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced nuclear level density and γ-ray strength function, restrictions on 75Ge(n, γ) reaction σ and rate. Hauser-Feshbach calculations.
doi: 10.1103/PhysRevLett.113.232502
2014TO07 Phys.Rev. C 89, 044323 (2014) T.G.Tornyi, M.Guttormsen, T.K.Eriksen, A.Gorgen, F.Giacoppo, T.W.Hagen, A.Krasznahorkay, A.C.Larsen, T.Renstrom, S.J.Rose, S.Siem, G.M.Tveten Level density and γ-ray strength function in the odd-odd 238Np nucleus NUCLEAR REACTIONS 237Np(d, pγ), E=13.5 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin, using SiRi particle telescope and CACTUS γ-detector system at Oslo Cyclotron Laboratory; deduced quasicontinuum using the Oslo method. 238Np; deduced γ multiplicity as function of excitation energy, quasicontinuum, level density, γ-ray strength function, scissor resonance parameter using OSLO method. 237Np(n, γ)238Np, E=10 eV-1 MeV; deduced σ(E) using level density and γ SF models corresponding to data in current work. Comparison with TALYS calculations and previous experimental data.
doi: 10.1103/PhysRevC.89.044323
2013GU10 Acta Phys.Pol. B44, 567 (2013) M.Guttormsen, L.A.Bernstein, A.Burger, A.Gorgen, F.Gunsing, T.W.Hagen, A.C.Larsen, T.Renstrom, S.Siem, M.Wiedeking, J.N.Wilson Observation of Large Orbital Scissors Strength in Actinides NUCLEAR REACTIONS 232Th(d, pγ)233Th, E=12 MeV; 232Th(3He, X), E=24 MeV; measured reaction products, Eγ, Iγ. 231,232,233Th, 232,233Pa; deduced scissors mode parameters, M1-scissors resonance, B(M1), increased γ-decay probability. Comparison with available data.
doi: 10.5506/APhysPolB.44.567
2013GU27 Phys.Rev. C 88, 024307 (2013) M.Guttormsen, B.Jurado, J.N.Wilson, M.Aiche, L.A.Bernstein, Q.Ducasse, F.Giacoppo, A.Gorgen, F.Gunsing, T.W.Hagen, A.C.Larsen, M.Lebois, B.Leniau, T.Renstrom, S.J.Rose, S.Siem, T.Tornyi, G.M.Tveten, M.Wiedeking Constant-temperature level densities in the quasicontinuum of Th and U isotopes NUCLEAR REACTIONS 232Th(d, p), (d, d'), (d, t), E=12 MeV; 232Th(3He, 3He'), (3He, α), E=24 MeV; 238U(d, p), (d, d'), (d, t), E=15 MeV; measured (particle)γ-coin in the quasicontinuum region using SiRi particle detector array and CACTUS-γ detector system at Oslo cyclotron laboratory; deduced excitation energy vs Eγ distributions. 231,232,233Th, 237,238,239U; deduced level densities using the Oslo method, increase in level density for odd-A isotopes as compared to even-even isotopes, similar temperatures in the quasicontinuum. 237,238,239U; deduced entropy, excess of entropy for odd-A isotopes as compared to even-even neighbor, microcanonical temperature, heat capacity. Evidence for continuous melting of Cooper pairs from constant temperature behavior.
doi: 10.1103/PhysRevC.88.024307
2013LA03 Phys.Rev. C 87, 014319 (2013) A.C.Larsen, I.E.Ruud, A.Burger, S.Goriely, M.Guttormsen, A.Gorgen, T.W.Hagen, S.Harissopulos, H.T.Nyhus, T.Renstrom, A.Schiller, S.Siem, G.M.Tveten, A.Voinov, M.Wiedeking Transitional γ strength in Cd isotopes NUCLEAR REACTIONS 106,112Cd(3He, α), (3He, 3He'), E=38 MeV; measured Eγ, Iγ, particle spectra, (particle)γ-coin using SiRi and CACTUS arrays at Oslo Cyclotron Laboratory. 105,106,111,112Cd; deduced level densities, γ-ray strength function. Comparisons with GLO model calculations, and with results of photonuclear reactions. Pygmy resonances. Effect of neutron skin oscillations or the spin-flip resonance.
doi: 10.1103/PhysRevC.87.014319
2013LA09 Acta Phys.Pol. B44, 563 (2013) A.C.Larsen, A.Burger, S.Goriely, M.Guttormsen, A.Gorgen, T.K.Eriksen, T.W.Hagen, S.Harissopulos, H.T.Nyhus, T.Renstrom, S.Rose, I.E.Ruud, A.Schiller, S.Siem, G.M.Tveten, A.Voinov Astrophysical Reaction Rates and the Low-energy Enhancement in the γ Strength COMPILATION 95Mo, Ti, Sc, V, Fe, Mo, Cd; compiled γ-strength functions.
doi: 10.5506/APhysPolB.44.563
2013LA35 Phys.Rev.Lett. 111, 242504 (2013) A.C.Larsen, N.Blasi, A.Bracco, F.Camera, T.K.Eriksen, A.Gorgen, M.Guttormsen, T.W.Hagen, S.Leoni, B.Million, H.T.Nyhus, T.Renstrom, S.J.Rose, I.E.Ruud, S.Siem, T.Tornyi, G.M.Tveten, A.V.Voinov, M.Wiedeking Evidence for the Dipole Nature of the Low-Energy γ Enhancement in 56Fe NUCLEAR REACTIONS 56Fe(p, X), E=16 MeV; measured reaction products, Eγ, Iγ. 13C, 16,17O, 28Si, 56,57Fe; deduced γ-ray strength function, σ(θ) for the high-energy γ-rays. Comparison with available data.
doi: 10.1103/PhysRevLett.111.242504
2012GU21 Phys.Rev.Lett. 109, 162503 (2012) M.Guttormsen, L.A.Bernstein, A.Burger, A.Gorgen, F.Gunsing, T.W.Hagen, A.C.Larsen, T.Renstrom, S.Siem, M.Wiedeking, J.N.Wilson Observation of Large Scissors Resonance Strength in Actinides NUCLEAR REACTIONS 232Th(3He, α), (3He, t), (3He, d), E=24 MeV;232Th(d, d), (d, p), E=12 MeV; measured reaction products; deduced radiative strength functions, M1 scissors resonance. Comparison with available data, theoretical calculations.
doi: 10.1103/PhysRevLett.109.162503
2012WI03 Phys.Rev. C 85, 034607 (2012) J.N.Wilson, F.Gunsing, L.A.Bernstein, A.Burger, A.Gorgen, M.Guttormsen, A.-C.Larsen, P.Mansouri, T.Renstrom, S.J.Rose, A.Semchenkov, S.Siem, N.U.H.Syed, H.K.Toft, M.Wiedeking, T.Wiborg-Hagen Indirect (n, γ) cross sections of thorium cycle nuclei using the surrogate method NUCLEAR REACTIONS 232Th(d, p)233Th, E=12 MeV; 232Th(3He, t)232Pa, 232Th(3He, α)231Th, E=24 MeV; measured energy loss, E(particle), I(particle), Eγ, Iγ, γ(fragment)-coin using CACTUS γ-detector array, and Silicon Ring charged-particle detector at Oslo Cyclotron Laboratory; deduced γ decay probabilities. 230,232Th, 231Pa(n, γ), E<1.4 MeV; deduced cross sections using surrogate ratio method. Comparison with evaluated data libraries. Optical model calculations of compound nucleus formation cross sections, and weighting function technique.
doi: 10.1103/PhysRevC.85.034607
2011TO03 Phys.Rev. C 83, 044320 (2011) H.K.Toft, A.C.Larsen, A.Burger, M.Guttormsen, A.Gorgen, H.T.Nyhus, T.Renstrom, S.Siem, G.M.Tveten, A.Voinov Evolution of the pygmy dipole resonance in Sn isotopes NUCLEAR REACTIONS 122Sn(3He, 3He'), (3He, α), E=34 MeV; measured Eγ, Iγ, (particle)γ-coin, continuum γ spectra using Oslo method. 121,122Sn; deduced γ-ray strength functions, level densities, pygmy resonances. Comparison with experimental data for 113,115,116,117,118,119,120Sn, and model calculations.
doi: 10.1103/PhysRevC.83.044320
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