Further Evidence for Shape Coexistence in 79Znm near Doubly Magic 78Ni

被引：7

作者：

Nies, L. ^{[1
,2
]}

Canete, L. ^{[3
,4
]}

Dao, D. D. ^{[5
]}

Giraud, S. ^{[6
,16
]}

Kankainen, A. ^{[3
]}

Lunney, D. ^{[7
]}

Nowacki, F. ^{[5
]}

Bastin, B. ^{[6
]}

Stryjczyk, M. ^{[3
]}

Ascher, P. ^{[8
]}

Blaum, K. ^{[9
]}

Cakirli, R. B. ^{[10
]}

Eronen, T. ^{[3
]}

Fischer, P. ^{[2
]}

Flayol, M. ^{[8
]}

Alcindor, V. Girard ^{[6
]}

Herlert, A. ^{[11
]}

Jokinen, A. ^{[3
]}

Khanam, A. ^{[3
,12
,13
]}

Koster, U. ^{[1
,14
]}

Lange, D. ^{[9
]}

Moore, I. D. ^{[3
]}

Mueller, M. ^{[9
]}

Mougeot, M. ^{[3
,9
]}

Nesterenko, D. A. ^{[3
]}

Penttila, H. ^{[3
]}

Petrone, C. ^{[15
]}

Pohjalainen, I. ^{[3
]}

de Roubin, A. ^{[3
,17
]}

Rubchenya, V. ^{[3
]}

Schweiger, Ch. ^{[9
]}

Schweikhard, L. ^{[2
]}

Vilen, M. ^{[3
]}

Aysto, J. ^{[3
]}

机构：

[1] European Org Nucl Res CERN, CH-1211 Geneva, Switzerland

[2] Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany

[3] Univ Jyvaskyla, Dept Phys, Accelerator Lab, POB 35 YFL, FI-40014 Jyvaskyla, Finland

[4] Univ Surrey, Dept Phys, Guildford GU2 7X5, England

[5] Univ Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France

[6] GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France

[7] Univ Paris Saclay, IJCLab, IN2P3, CNRS, F-91405 Orsay, France

[8] Univ Bordeaux, CNRS, IN2P3, LP2I Bordeaux,UMR 5797, F-33170 Gradignan, France

[9] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[10] Istanbul Univ, Dept Phys, TR-34134 Istanbul, Turkiye

[11] FAIR GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[12] Aalto Univ, Dept Appl Phys, POB 15100, FI-00076 Aalto, Finland

[13] Univ Helsinki, Dept Phys, POB 43, FI-00014 Helsinki, Finland

[14] Inst Laue Langevin, F-38000 Grenoble, France

[15] IFIN HH, POB MG-6, Magurele 077125, Romania

[16] Michigan State Univ, Facil Rare Isotope Beams, E Lansing, MI 48824 USA

[17] Katholieke Univ Leuven, Inst Voor Kern En Stralingsfys, B-3001 Leuven, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 22期

基金：

芬兰科学院; 欧洲研究理事会;

关键词：

ION-BEAM; TRAP; PURIFICATION; LINE;

D O I：

10.1103/PhysRevLett.131.222503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Isomers close to doubly magic 78 28Ni50 provide essential information on the shell evolution and shape coexistence near the Z = 28 and N = 50 double shell closure. We report the excitation energy measurement of the 1/2+ isomer in 79 30Zn49 through independent high-precision mass measurements with the JYFLTRAP double Penning trap and with the ISOLTRAP multi-reflection time-of-flight mass spectrometer. We unambiguously place the 1/2+ isomer at 942(10) keV, slightly below the 5/2+ state at 983(3) keV. With the use of state-of-the-art shell-model diagonalizations, complemented with discrete nonorthogonal shell-model calculations which are used here for the first time to interpret shape coexistence, we find low-lying deformed intruder states, similar to other N = 49 isotones. The 1/2+ isomer is interpreted as the bandhead of a low-lying deformed structure akin to a predicted low-lying deformed band in 80Zn, and points to shape coexistence in 79;80Zn similar to the one observed in 78Ni. The results make a strong case for confirming the claim of shape coexistence in this key region of the nuclear chart.

引用

页数：7

共 25 条

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