Type II shell evolution in A=70 isobars from the N≥40 island of inversion
The level structures of 70Co and 70Ni, populated from the β decay of 70Fe, have been investigated using β-delayed γ-ray spectroscopy following in-flight fission of a 238U beam. The experimental results are compared to Monte-Carlo Shell-Model calculations including the pf+g9/2+d5/2 orbitals. The stro...
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| Format: | Article |
| Language: | English |
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Elsevier
2017-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316307638 |
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English |
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Article |
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DOAJ |
| author |
A.I. Morales G. Benzoni H. Watanabe Y. Tsunoda T. Otsuka S. Nishimura F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco F. Camera S. Ceruti F.C.L. Crespi G. de Angelis M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta J.J. Valiente-Dobón O. Wieland M. Yalcinkaya |
| spellingShingle |
A.I. Morales G. Benzoni H. Watanabe Y. Tsunoda T. Otsuka S. Nishimura F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco F. Camera S. Ceruti F.C.L. Crespi G. de Angelis M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta J.J. Valiente-Dobón O. Wieland M. Yalcinkaya Type II shell evolution in A=70 isobars from the N≥40 island of inversion Physics Letters B |
| author_facet |
A.I. Morales G. Benzoni H. Watanabe Y. Tsunoda T. Otsuka S. Nishimura F. Browne R. Daido P. Doornenbal Y. Fang G. Lorusso Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J. Wu Z.Y. Xu A. Yagi R. Yokoyama H. Baba R. Avigo F.L. Bello Garrote N. Blasi A. Bracco F. Camera S. Ceruti F.C.L. Crespi G. de Angelis M.-C. Delattre Zs. Dombradi A. Gottardo T. Isobe I. Kojouharov N. Kurz I. Kuti K. Matsui B. Melon D. Mengoni T. Miyazaki V. Modamio-Hoybjor S. Momiyama D.R. Napoli M. Niikura R. Orlandi H. Sakurai E. Sahin D. Sohler H. Schaffner R. Taniuchi J. Taprogge Zs. Vajta J.J. Valiente-Dobón O. Wieland M. Yalcinkaya |
| author_sort |
A.I. Morales |
| title |
Type II shell evolution in A=70 isobars from the N≥40 island of inversion |
| title_short |
Type II shell evolution in A=70 isobars from the N≥40 island of inversion |
| title_full |
Type II shell evolution in A=70 isobars from the N≥40 island of inversion |
| title_fullStr |
Type II shell evolution in A=70 isobars from the N≥40 island of inversion |
| title_full_unstemmed |
Type II shell evolution in A=70 isobars from the N≥40 island of inversion |
| title_sort |
type ii shell evolution in a=70 isobars from the n≥40 island of inversion |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 1873-2445 |
| publishDate |
2017-02-01 |
| description |
The level structures of 70Co and 70Ni, populated from the β decay of 70Fe, have been investigated using β-delayed γ-ray spectroscopy following in-flight fission of a 238U beam. The experimental results are compared to Monte-Carlo Shell-Model calculations including the pf+g9/2+d5/2 orbitals. The strong population of a (1+) state at 274 keV in 70Co is at variance with the expected excitation energy of ∼1 MeV from near spherical single-particle estimates. This observation indicates a dominance of prolate-deformed intruder configurations in the low-lying levels, which coexist with the normal near spherical states. It is shown that the β decay of the neutron-rich A=70 isobars from the new island of inversion to the Z=28 closed-shell regime progresses in accordance with a newly reported type of shell evolution, the so-called Type II, which involves many particle-hole excitations across energy gaps. |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269316307638 |
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doaj-66da80e7efb341ed8f7a379f02f59e792020-11-24T21:23:44ZengElsevierPhysics Letters B0370-26931873-24452017-02-01765C32833310.1016/j.physletb.2016.12.025Type II shell evolution in A=70 isobars from the N≥40 island of inversionA.I. Morales0G. Benzoni1H. Watanabe2Y. Tsunoda3T. Otsuka4S. Nishimura5F. Browne6R. Daido7P. Doornenbal8Y. Fang9G. Lorusso10Z. Patel11S. Rice12L. Sinclair13P.-A. Söderström14T. Sumikama15J. Wu16Z.Y. Xu17A. Yagi18R. Yokoyama19H. Baba20R. Avigo21F.L. Bello Garrote22N. Blasi23A. Bracco24F. Camera25S. Ceruti26F.C.L. Crespi27G. de Angelis28M.-C. Delattre29Zs. Dombradi30A. Gottardo31T. Isobe32I. Kojouharov33N. Kurz34I. Kuti35K. Matsui36B. Melon37D. Mengoni38T. Miyazaki39V. Modamio-Hoybjor40S. Momiyama41D.R. Napoli42M. Niikura43R. Orlandi44H. Sakurai45E. Sahin46D. Sohler47H. Schaffner48R. Taniuchi49J. Taprogge50Zs. Vajta51J.J. Valiente-Dobón52O. Wieland53M. Yalcinkaya54Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, ChinaCenter for Nuclear Study, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanSchool of Computing, Engineering and Mathematics, University of Brighton, Brighton, United KingdomDepartment 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 KingdomDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomDepartment of Physics, University of York, Heslington, York YO10 5DD, United KingdomRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, Tohoku University, Miyagi 980-8578, JapanRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDepartment of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, 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, JapanIstituto 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, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, 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, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, JapanIstituto Nazionale di Fisica Nucleare, Sezione di Firenze, I-50019 Firenze, ItalyDipartimento di Fisica, Università degli Studi 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, BelgiumRIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, 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, SpainMTA Atomki, H-4001 Debrecen, HungaryIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, ItalyDepartment of Physics, Istanbul University, 34134 Istanbul, TurkeyThe level structures of 70Co and 70Ni, populated from the β decay of 70Fe, have been investigated using β-delayed γ-ray spectroscopy following in-flight fission of a 238U beam. The experimental results are compared to Monte-Carlo Shell-Model calculations including the pf+g9/2+d5/2 orbitals. The strong population of a (1+) state at 274 keV in 70Co is at variance with the expected excitation energy of ∼1 MeV from near spherical single-particle estimates. This observation indicates a dominance of prolate-deformed intruder configurations in the low-lying levels, which coexist with the normal near spherical states. It is shown that the β decay of the neutron-rich A=70 isobars from the new island of inversion to the Z=28 closed-shell regime progresses in accordance with a newly reported type of shell evolution, the so-called Type II, which involves many particle-hole excitations across energy gaps.http://www.sciencedirect.com/science/article/pii/S0370269316307638 |