Is seniority a partial dynamic symmetry in the first νg9/2 shell?
The low-lying structures of the midshell νg9/2 Ni isotopes 72Ni and 74Ni have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following β decay of the mother nuclei 72Co and 74Co. As a result, we...
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-06-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318303435 |
| _version_ | 1828435507688767488 |
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| author | A.I. Morales G. Benzoni H. Watanabe G. de Angelis S. Nishimura L. Coraggio A. Gargano N. Itaco T. Otsuka Y. Tsunoda P. Van Isacker F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J.J. Valiente-Dobón J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco A.M. Bruce F. Camera S. Ceruti F.C.L. Crespi M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti S. Lalkovski K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi Zs. Podolyák P.H. Regan H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta O. Wieland M. Yalcinkaya |
| author_facet | A.I. Morales G. Benzoni H. Watanabe G. de Angelis S. Nishimura L. Coraggio A. Gargano N. Itaco T. Otsuka Y. Tsunoda P. Van Isacker F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J.J. Valiente-Dobón J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco A.M. Bruce F. Camera S. Ceruti F.C.L. Crespi M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti S. Lalkovski K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi Zs. Podolyák P.H. Regan H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta O. Wieland M. Yalcinkaya |
| author_sort | A.I. Morales |
| collection | DOAJ |
| description | The low-lying structures of the midshell νg9/2 Ni isotopes 72Ni and 74Ni have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following β decay of the mother nuclei 72Co and 74Co. As a result, we provide a complete picture in terms of the seniority scheme up to the first (8+) levels for both nuclei. The experimental results are compared to shell-model calculations in order to define to what extent the seniority quantum number is preserved in the first neutron g9/2 shell. We find that the disappearance of the seniority isomerism in the (81+) states can be explained by a lowering of the seniority-four (6+) levels as predicted years ago. For 74Ni, the internal de-excitation pattern of the newly observed (62+) state supports a restoration of the normal seniority ordering up to spin J=4. This property, unexplained by the shell-model calculations, is in agreement with a dominance of the single-particle spherical regime near 78Ni. |
| first_indexed | 2024-12-10T19:08:19Z |
| format | Article |
| id | doaj.art-c9a376cac71d4f7089b5a0bfe117b556 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-10T19:08:19Z |
| publishDate | 2018-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-c9a376cac71d4f7089b5a0bfe117b5562022-12-22T01:36:49ZengElsevierPhysics Letters B0370-26932018-06-01781706712Is seniority a partial dynamic symmetry in the first νg9/2 shell?A.I. Morales0G. Benzoni1H. Watanabe2G. de Angelis3S. Nishimura4L. Coraggio5A. Gargano6N. Itaco7T. Otsuka8Y. Tsunoda9P. Van Isacker10F. Browne11R. Daido12P. Doornenbal13Y. Fang14G. Lorusso15Z. Patel16S. Rice17L. Sinclair18P.-A. Söderström19T. Sumikama20J.J. Valiente-Dobón21J. Wu22Z.Y. Xu23A. Yagi24R. Yokoyama25H. Baba26R. Avigo27F.L. Bello Garrote28N. Blasi29A. Bracco30A.M. Bruce31F. Camera32S. Ceruti33F.C.L. Crespi34M.-C. Delattre35Zs. Dombradi36A. Gottardo37T. Isobe38I. Kojouharov39N. Kurz40I. Kuti41S. Lalkovski42K. Matsui43B. Melon44D. Mengoni45T. Miyazaki46V. Modamio-Hoybjor47S. Momiyama48D.R. Napoli49M. Niikura50R. Orlandi51Zs. Podolyák52P.H. Regan53H. Sakurai54E. Sahin55D. Sohler56H. Schaffner57R. Taniuchi58J. Taprogge59Zs. Vajta60O. Wieland61M. Yalcinkaya62Dipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, Italy; IFIC, CSIC-Universitat de València, E-46071 València, Spain; Corresponding author at: IFIC, CSIC-Universitat de València, E-46071 València, Spain.Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanIstituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; Dipartimento di Matematica e Fisica dell'Università degli Studi della Campania, I-81100 Caserta, ItalyCenter for Nuclear Study, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan; Department of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA; Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, BelgiumCenter for Nuclear Study, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanGrand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5, FranceSchool of Computing, Engineering and Mathematics, University of Brighton, Brighton, United Kingdom; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, Osaka University, Osaka, 560-0043 Toyonaka, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, Osaka University, Osaka, 560-0043 Toyonaka, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, University of York, Heslington, York YO10 5DD, United Kingdom; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, Tohoku University, Miyagi 980-8578, JapanIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, Osaka University, Osaka, 560-0043 Toyonaka, JapanDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalySchool of Computing, Engineering and Mathematics, University of Brighton, Brighton, United KingdomDipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDipartimento di Fisica dell'Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIPNO Orsay, 91400 Orsay, FranceMTA Atomki, H-4001 Debrecen, HungaryIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanGSI, Planckstrasse 1, D-64291 Darmstadt, GermanyGSI, Planckstrasse 1, D-64291 Darmstadt, GermanyMTA Atomki, H-4001 Debrecen, HungaryDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanINFN Sezione di Firenze, I-50019 Firenze, ItalyDipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, ItalyDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanInstituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium; Advanced Science Research Center, JAEA, Tokai, Ibaraki 319-1195, JapanDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomDepartment of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom; Nuclear Metrology Group, National Physical Laboratory, Teddington, Middlesex, TW11 0LW, United KingdomRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Department of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayMTA Atomki, H-4001 Debrecen, HungaryGSI, Planckstrasse 1, D-64291 Darmstadt, GermanyDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain; Departamento de Física teórica, Universidad Autónoma de Madrid, E-28049 Madrid, SpainMTA Atomki, H-4001 Debrecen, HungaryIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDepartment of Physics, Istanbul University, 34134 Istanbul, TurkeyThe low-lying structures of the midshell νg9/2 Ni isotopes 72Ni and 74Ni have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following β decay of the mother nuclei 72Co and 74Co. As a result, we provide a complete picture in terms of the seniority scheme up to the first (8+) levels for both nuclei. The experimental results are compared to shell-model calculations in order to define to what extent the seniority quantum number is preserved in the first neutron g9/2 shell. We find that the disappearance of the seniority isomerism in the (81+) states can be explained by a lowering of the seniority-four (6+) levels as predicted years ago. For 74Ni, the internal de-excitation pattern of the newly observed (62+) state supports a restoration of the normal seniority ordering up to spin J=4. This property, unexplained by the shell-model calculations, is in agreement with a dominance of the single-particle spherical regime near 78Ni.http://www.sciencedirect.com/science/article/pii/S0370269318303435 |
| spellingShingle | A.I. Morales G. Benzoni H. Watanabe G. de Angelis S. Nishimura L. Coraggio A. Gargano N. Itaco T. Otsuka Y. Tsunoda P. Van Isacker F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J.J. Valiente-Dobón J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco A.M. Bruce F. Camera S. Ceruti F.C.L. Crespi M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti S. Lalkovski K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi Zs. Podolyák P.H. Regan H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta O. Wieland M. Yalcinkaya Is seniority a partial dynamic symmetry in the first νg9/2 shell? Physics Letters B |
| title | Is seniority a partial dynamic symmetry in the first νg9/2 shell? |
| title_full | Is seniority a partial dynamic symmetry in the first νg9/2 shell? |
| title_fullStr | Is seniority a partial dynamic symmetry in the first νg9/2 shell? |
| title_full_unstemmed | Is seniority a partial dynamic symmetry in the first νg9/2 shell? |
| title_short | Is seniority a partial dynamic symmetry in the first νg9/2 shell? |
| title_sort | is seniority a partial dynamic symmetry in the first νg9 2 shell |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318303435 |
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