Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes
Understanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level densities for a chain of neodymium isotopes 142,144−151Nd which exhibit such a crossover. These results represent the m...
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Elsevier
2021-05-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321001465 |
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doaj-7357b10a92274285a328fe493129a67e2021-03-25T04:26:08ZengElsevierPhysics Letters B0370-26932021-05-01816136206Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopesM. Guttormsen0Y. Alhassid1W. Ryssens2K.O. Ay3M. Ozgur4E. Algin5A.C. Larsen6F.L. Bello Garrote7L. Crespo Campo8T. Dahl-Jacobsen9A. Görgen10T.W. Hagen11V.W. Ingeberg12B.V. Kheswa13M. Klintefjord14J.E. Midtbø15V. Modamio16T. Renstrøm17E. Sahin18S. Siem19G.M. Tveten20F. Zeiser21Department of Physics, University of Oslo, N-0316 Oslo, Norway; Corresponding author.Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, CT 06520, USACenter for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, CT 06520, USADepartment of Physics, Eskisehir Osmangazi University, Faculty of Science and Letters, TR-26040 Eskisehir, TurkeyDepartment of Physics, Eskisehir Osmangazi University, Faculty of Science and Letters, TR-26040 Eskisehir, TurkeyDepartment of Physics, Eskisehir Osmangazi University, Faculty of Science and Letters, TR-26040 Eskisehir, Turkey; Department of Electrical and Electronics Engineering, AAT Science and Technology University, 01250 Adana, TurkeyDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, Norway; Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South AfricaDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayUnderstanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level densities for a chain of neodymium isotopes 142,144−151Nd which exhibit such a crossover. These results represent the most complete data set of nuclear level densities to date for an isotopic chain between neutron shell-closure and towards mid-shell. We observe a strong increase of the level densities along the chain with an overall increase by a factor of ≈150 at an excitation energy of 6 MeV and saturation around mass 150. Level densities calculated by the shell model Monte Carlo (SMMC) are in excellent agreement with these experimental results. Based on our experimental and theoretical findings, we offer an explanation of the observed mass dependence of the level densities in terms of the intrinsic single-particle level density and the collective enhancement.http://www.sciencedirect.com/science/article/pii/S0370269321001465Nuclear level densityOslo methodShell model Monte CarloMean-field theoryCollective enhancement |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
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. Görgen T.W. Hagen V.W. Ingeberg B.V. Kheswa M. Klintefjord J.E. Midtbø V. Modamio T. Renstrøm E. Sahin S. Siem G.M. Tveten F. Zeiser |
| spellingShingle |
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. Görgen T.W. Hagen V.W. Ingeberg B.V. Kheswa M. Klintefjord J.E. Midtbø V. Modamio T. Renstrøm E. Sahin S. Siem G.M. Tveten F. Zeiser Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes Physics Letters B Nuclear level density Oslo method Shell model Monte Carlo Mean-field theory Collective enhancement |
| author_facet |
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. Görgen T.W. Hagen V.W. Ingeberg B.V. Kheswa M. Klintefjord J.E. Midtbø V. Modamio T. Renstrøm E. Sahin S. Siem G.M. Tveten F. Zeiser |
| author_sort |
M. Guttormsen |
| title |
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| title_short |
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| title_full |
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| title_fullStr |
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| title_full_unstemmed |
Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| title_sort |
strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2021-05-01 |
| description |
Understanding the evolution of level densities in the crossover from spherical to well-deformed nuclei has been a long-standing problem in nuclear physics. We measure nuclear level densities for a chain of neodymium isotopes 142,144−151Nd which exhibit such a crossover. These results represent the most complete data set of nuclear level densities to date for an isotopic chain between neutron shell-closure and towards mid-shell. We observe a strong increase of the level densities along the chain with an overall increase by a factor of ≈150 at an excitation energy of 6 MeV and saturation around mass 150. Level densities calculated by the shell model Monte Carlo (SMMC) are in excellent agreement with these experimental results. Based on our experimental and theoretical findings, we offer an explanation of the observed mass dependence of the level densities in terms of the intrinsic single-particle level density and the collective enhancement. |
| topic |
Nuclear level density Oslo method Shell model Monte Carlo Mean-field theory Collective enhancement |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269321001465 |
| work_keys_str_mv |
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