NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = T.W.Hagen Found 36 matches. 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
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
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
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
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
2018HA16 Eur.Phys.J. A 54, 50 (2018) T.W.Hagen, A.Gorgen, W.Korten, L.Grente, M.-D.Salsac, F.Farget, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon Lifetimes of excited states in triaxially deformed 107Tc and 109, 111, 113Rh NUCLEAR REACTIONS 9B(238U, F), E=6.2 MeV/nucleon; measured reaction products. 107Tc, 109,111,113Rh; measured prompt Eγ, Iγ, γγ-coin using EXOGAM Ge detector array, (ion)γ-coin; deduced T1/2, positive-parity yrast bands using Recoil-Distance Doppler Shift (RDDS) method; calculated yrast bands states T1/2 using triaxial particle-rotor method; deduced configuration for the strongest positive-parity band in 107Tc, indicated gradual increase of triaxial deformation with atomic number Z, reaching almost maximum triaxiality for neutron-rich Rh nuclei. T1/2 compared to data.
doi: 10.1140/epja/i2018-12482-9
2018SI26 Phys.Rev.Lett. 121, 192501 (2018) P.Singh, W.Korten, T.W.Hagen, A.Gorgen, L.Grente, M.-D.Salsac, F.Farget, E.Clement, G.de France, T.Braunroth, B.Bruyneel, I.Celikovic, O.Delaune, A.Dewald, A.Dijon, J.-P.Delaroche, M.Girod, M.Hackstein, B.Jacquot, J.Libert, J.Litzinger, J.Ljungvall, C.Louchart, A.Gottardo, C.Michelagnoli, C.Muller-Gatermann, D.R.Napoli, T.Otsuka, N.Pillet, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, T.Togashi, Y.Tsunoda, Ch.Theisen, J.J.Valiente-Dobon Evidence for Coexisting Shapes through Lifetime Measurements in 98Zr NUCLEAR REACTIONS 9Be(238U, X)98Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced level lifetimes, B(E2) values. Comparison with available data. Recoil-distance Doppler shift method.
doi: 10.1103/PhysRevLett.121.192501
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
2017HA12 Phys.Rev. C 95, 034302 (2017) T.W.Hagen, A.Gorgen, W.Korten, L.Grente, M.-D.Salsac, F.Farget, I.Ragnarsson, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, F.Recchia, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions NUCLEAR REACTIONS 9Be(238U, F)92Y/93Y/94Y/95Y/96Y/97Y/98Y/99Y/100Y/101Y/102Y/103Y/97Nb/98Nb/99Nb/100Nb/101Nb/102Nb/103Nb/104Nb/105Nb/106Nb/107Nb/108Nb, E=6.2 MeV/nucleon; measured energy loss ΔE versus the total energy, mass versus mass-to-charge ratio, mass distributions of fission fragments, Eγ, Iγ, (fission fragment)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using VAMOS++ spectrometer and EXOGAM array at GANIL facility. 99,101Y, 101,103,105,107Nb; deduced high-spin levels, J, π, rotational bands, configurations, B(M1), B(E2). Comparison with triaxial particle-rotor calculations.
doi: 10.1103/PhysRevC.95.034302
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
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
2016HA04 Acta Phys.Pol. B47, 903 (2016) T.W.Hagen, L.Grente, A.Gorgen, M.-D.Salsac, W.Korten, F.Farget, T.Braunroth, B.Bruyneel, I.Celikovic, E.Clement, G.de France, O.Delaune, A.Dewald, A.Dijon, M.Hackstein, B.Jacquot, J.Litzinger, J.Ljungvall, C.Louchart, C.Michelagnoli, D.R.Napoli, A.Navin, F.Recchia, M.Rejmund, W.Rother, E.Sahin, S.Siem, B.Sulignano, Ch.Theisen, J.J.Valiente-Dobon Lifetime Measurements of Excited States in Neutron-rich Fission Fragments RADIOACTIVITY 247Cm(SF) [ from 9Be(238U, X)247Cm, E=6.2 MeV/nucleon]; measured decay products, Eγ, Iγ. 99Y; deduced energy levels, J, π.
doi: 10.5506/APhysPolB.47.903
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
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
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
2015BE25 Phys.Rev. C 92, 024317 (2015) F.L.Bello Garrote, A.Gorgen, J.Mierzejewski, C.Mihai, J.P.Delaroche, M.Girod, J.Libert, E.Sahin, J.Srebrny, T.Abraham, T.K.Eriksen, F.Giacoppo, T.W.Hagen, M.Kisielinski, M.Klintefjord, M.Komorowska, M.Kowalczyk, A.C.Larsen, T.Marchlewski, I.O.Mitu, S.Pascu, S.Siem, A.Stolarz, T.G.Tornyi Lifetime measurement for the 2+1 state in 140Sm and the onset of collectivity in neutron-deficient Sm isotopes NUCLEAR REACTIONS 124Te(20Ne, 4n), E=82 MeV; measured Eγ, Iγ, γγ-coin, lifetime of the first 2+ state by recoil-distance Doppler shift technique using Koln-Bucharest Plunger device coupled to the EAGLE spectrometer at Heavy Ion Laboratory of the University of Warsaw. 140Sm; deduced levels, B(E2). Systematics of energies and B(E2) of first 2+ states, and E(4+)/E(2+) in 134,136,138,140,142,144,146,148,150,152,154Sm. 141Sm, 197Au; observed γ. Fit of B(E2) and E(2+) with modified Grodzins formula. Comparison with calculations based on a mapped collective Hamiltonian in five quadrupole coordinates (5DCH) and the Gogny D1S interaction.
doi: 10.1103/PhysRevC.92.024317
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
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
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
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
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
2013CE01 Acta Phys.Pol. B44, 375 (2013) I.Celikovic, A.Dijon, E.Clement, G.de France, P.Van Isacker, J.Ljungvall, 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 Lifetime Measurements of Zn Isotopes Around N = 40 NUCLEAR REACTIONS 70Zn(238U, X)70Zn/72Zn, E=6.76 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced B(E2). Recoil Distance Doppler Shift method.
doi: 10.5506/APhysPolB.44.375
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
2011HA06 Acta Phys.Pol. B42, 605 (2011) T.W.Hagen, A.Lopez-Martens, K.Hauschild, A.V.Belozerov, M.L.Chelnokov, V.I.Chepigin, D.Curien, O.Dorvaux, G.Drafta, B.Gall, A.Gorgen, M.Guttormsen, A.V.Isaev, I.N.Izosimov, A.P.Kabachenko, D.E.Katrasev, T.Kutsarova, A.N.Kuznetsov, A.C.Larsen, O.N.Malyshev, A.Minkova, S.Mullins, H.T.Nyhus, D.Pantelica, J.Piot, A.G.Popeko, S.Saro, N.Scintee, S.Siem, E.A.Sokol, A.I.Svirikhin, A.V.Yeremin Spectroscopy of Transfermium Nuclei Using the GABRIELA Setup COMPILATION 243Pu, 245Cm, 247Cf, 249Fm, 251No; compiled low-energy level properties for N=149 isotones.
doi: 10.5506/APhysPolB.42.605
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