Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure
The decay of excited states of the nucleus 135Sn, with three neutrons outside the doubly-magic 132Sn core, was studied in an experiment performed at the Radioactive Isotope Beam Factory at RIKEN. Several γ rays emitted from excited 135Sn ions were observed following one-neutron and one-neutron-one-p...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324001199 |
| _version_ | 1797221808764616704 |
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| author | A. Jungclaus P. Doornenbal J. Acosta V. Vaquero F. Browne M.L. Cortes A. Gargano T. Koiwai H. Naïdja R. Taniuchi J.A. Tostevin K. Wimmer A. Algora H. Baba A. Fernández N. Lalović E. Nácher B. Rubio H. Sakurai |
| author_facet | A. Jungclaus P. Doornenbal J. Acosta V. Vaquero F. Browne M.L. Cortes A. Gargano T. Koiwai H. Naïdja R. Taniuchi J.A. Tostevin K. Wimmer A. Algora H. Baba A. Fernández N. Lalović E. Nácher B. Rubio H. Sakurai |
| author_sort | A. Jungclaus |
| collection | DOAJ |
| description | The decay of excited states of the nucleus 135Sn, with three neutrons outside the doubly-magic 132Sn core, was studied in an experiment performed at the Radioactive Isotope Beam Factory at RIKEN. Several γ rays emitted from excited 135Sn ions were observed following one-neutron and one-neutron-one-proton removal from 136Sn and 137Sb beams, respectively, on a beryllium target at relativistic energies. Based on the analogy to 133Sn populated via one-neutron removal from 134Sn, an excitation energy of 695(15) keV is assigned to the 3/2− state with strongest single-particle character in 135Sn. This result provides the first direct information about the evolution of the neutron shell structure beyond N=82 and thus allows for a crucial test of shell-model calculations in this region. The experimental findings are in full agreement with calculations performed employing microscopic effective two-body interactions derived from CD-Bonn and N3LO nucleon-nucleon potentials, which do not predict a pronounced subshell gap at neutron number N=90. The occurrence of such a gap in 140Sn, i.e., when the 1f7/2 orbital is completely filled, had been proposed in the past, in analogy to the magicity of 48Ca, featuring a completely filled 0f7/2 orbital one harmonic oscillator shell below. |
| first_indexed | 2024-04-24T13:11:19Z |
| format | Article |
| id | doaj.art-0b4c46603f6b48e1bed3fb271ef6008a |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-24T13:11:19Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-0b4c46603f6b48e1bed3fb271ef6008a2024-04-05T04:39:45ZengElsevierPhysics Letters B0370-26932024-04-01851138561Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closureA. Jungclaus0P. Doornenbal1J. Acosta2V. Vaquero3F. Browne4M.L. Cortes5A. Gargano6T. Koiwai7H. Naïdja8R. Taniuchi9J.A. Tostevin10K. Wimmer11A. Algora12H. Baba13A. Fernández14N. Lalović15E. Nácher16B. Rubio17H. Sakurai18Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain; Corresponding author.RIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, JapanInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainRIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, JapanRIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, JapanIstituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, ItalyDepartment of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, JapanUniversité Constantine 1, Laboratoire de physique mathématique et subatomique (LPMPS), Constantine 25000, AlgeriaRIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, JapanDepartment of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United KingdomGSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, GermanyInstituto de Física Corpuscular, CSIC-Univ. of Valencia, E-46980 Paterna, SpainRIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, JapanInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainDepartment of Physics, Lund University, S-22100 Lund, SwedenInstituto de Física Corpuscular, CSIC-Univ. of Valencia, E-46980 Paterna, SpainInstituto de Física Corpuscular, CSIC-Univ. of Valencia, E-46980 Paterna, SpainRIKEN Nishina Center, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, JapanThe decay of excited states of the nucleus 135Sn, with three neutrons outside the doubly-magic 132Sn core, was studied in an experiment performed at the Radioactive Isotope Beam Factory at RIKEN. Several γ rays emitted from excited 135Sn ions were observed following one-neutron and one-neutron-one-proton removal from 136Sn and 137Sb beams, respectively, on a beryllium target at relativistic energies. Based on the analogy to 133Sn populated via one-neutron removal from 134Sn, an excitation energy of 695(15) keV is assigned to the 3/2− state with strongest single-particle character in 135Sn. This result provides the first direct information about the evolution of the neutron shell structure beyond N=82 and thus allows for a crucial test of shell-model calculations in this region. The experimental findings are in full agreement with calculations performed employing microscopic effective two-body interactions derived from CD-Bonn and N3LO nucleon-nucleon potentials, which do not predict a pronounced subshell gap at neutron number N=90. The occurrence of such a gap in 140Sn, i.e., when the 1f7/2 orbital is completely filled, had been proposed in the past, in analogy to the magicity of 48Ca, featuring a completely filled 0f7/2 orbital one harmonic oscillator shell below.http://www.sciencedirect.com/science/article/pii/S0370269324001199 |
| spellingShingle | A. Jungclaus P. Doornenbal J. Acosta V. Vaquero F. Browne M.L. Cortes A. Gargano T. Koiwai H. Naïdja R. Taniuchi J.A. Tostevin K. Wimmer A. Algora H. Baba A. Fernández N. Lalović E. Nácher B. Rubio H. Sakurai Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure Physics Letters B |
| title | Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure |
| title_full | Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure |
| title_fullStr | Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure |
| title_full_unstemmed | Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure |
| title_short | Position of the single-particle 3/2− state in 135Sn and the N=90 subshell closure |
| title_sort | position of the single particle 3 2 state in 135sn and the n 90 subshell closure |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324001199 |
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