Isomeric states in neutron-rich nuclei near N=40

被引：3

作者：

Wimmer, K. ^{[1
,2
,3
]}

Recchia, F. ^{[4
,5
]}

Lenzi, S. M. ^{[4
,5
]}

Riccetto, S. ^{[6
,7
]}

Davinson, T. ^{[8
]}

Estrade, A. ^{[9
]}

Griffin, C. J. ^{[8
]}

Nishimura, S. ^{[3
]}

Phong, V ^{[3
,10
]}

Soderstrom, P-A ^{[3
]}

Aktas, O. ^{[11
]}

Al-Aqeel, M. ^{[12
,13
]}

Ando, T. ^{[2
]}

Baba, H. ^{[3
]}

Bae, S. ^{[14
,15
]}

Choi, S. ^{[14
,15
]}

Doornenbal, P. ^{[3
]}

Ha, J. ^{[14
]}

Harkness-Brennan, L. ^{[12
]}

Isobe, T. ^{[3
]}

John, P. R. ^{[4
,5
,21
]}

Kahl, D. ^{[8
]}

Kiss, G. ^{[3
,22
]}

Kojouharov, I ^{[16
]}

Kurz, N. ^{[16
]}

Labiche, M. ^{[17
]}

Matsui, K. ^{[2
]}

Momiyama, S. ^{[2
]}

Napoli, D. R. ^{[18
]}

Niikura, M. ^{[2
]}

Nita, C. ^{[19
]}

Saito, Y. ^{[3
]}

Sakurai, H. ^{[2
,3
]}

Schaffner, H. ^{[16
]}

Schrock, P. ^{[20
]}

Stahl, C. ^{[21
]}

Sumikama, T. ^{[3
]}

Werner, V ^{[21
]}

Witt, W. ^{[16
,21
]}

Woods, P. J. ^{[8
]}

机构：

[1] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[2] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[3] RIKEN Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[4] Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy

[5] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[6] Univ Perugia, Dipartimento Fis & Geol, I-061123 Perugia, Italy

[7] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[8] Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg, Edinburgh EH9 3FD, Midlothian, Scotland

[9] Cent Michigan Univ, Mt Pleasant, MI 48859 USA

[10] VNU Univ Sci, Fac Phys, 334 Nguyen Trai, Hanoi, Vietnam

[11] KTH Royal Inst Technol, S-11428 Stockholm, Sweden

[12] Univ Liverpool, Dept Phys, Oliver Lodge Bldg,Oxford St, Liverpool L69 7ZE, Merseyside, England

[13] Al Imam Mohammad Ibn Saud Islamic Univ IMISU, Coll Sci, Dept Phys, Riyadh 11623, Saudi Arabia

[14] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[15] Seoul Natl Univ, Inst Nucl & Particle Astrophys, Seoul 08826, South Korea

[16] GSI Helmholtzzentum Schwerionenforsch GmbH, Darmstadt, Germany

[17] STFC Daresbury Lab, Warrington WA4 4FX, Cheshire, England

[18] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy

[19] Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, Bucharest, Romania

[20] Univ Tokyo, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[21] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[22] Inst Nucl Res, Bemter 18-C, H-4026 Debrecen, Hungary

来源：

PHYSICAL REVIEW C | 2021年 / 104卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

DECAY HALF-LIVES; BETA-DECAY; ISOTOPES; SPECTROSCOPY; DEFORMATION; ISLAND; TI;

D O I：

10.1103/PhysRevC.104.014304

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Neutron-rich nuclei in the vicinity of the N = 40 island of inversion are characterized by shell evolution and exhibit deformed ground states. In several nuclei isomeric states have been observed and attributed to excitations to the intruder neutron 1g(9/2) orbital. In the present paper we searched for isomeric states in nuclei around N = 40, Z = 22 produced by projectile fragmentation at the Radioactive Isotope Beam Factory. Delayed. rays were detected by the Euroball RIKEN Cluster Array germanium detector array gamma High statistics data allowed for an updated decay scheme of V-60. The lifetime of an isomeric state in V-64 was measured for the first time in the present experiment. A previously unobserved isomeric state was discovered in Sc-58. The measured lifetime suggests a parity changing transition, originating from an odd number of neutrons in the 1g(9/2) orbital. The nature of the isomeric state in Sc-58 is, thus, different from isomers in the less exotic V and Sc nuclei.

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页数：5

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