Low-lying structure and shape evolution in neutron-rich Se isotopes

被引：29

作者：

Chen, S. ^{[1
,2
,3
]}

Doornenbal, P. ^{[3
]}

Obertelli, A. ^{[3
,4
]}

Rodriguez, T. R. ^{[5
]}

Authelet, G. ^{[4
]}

Baba, H. ^{[3
]}

Calvet, D. ^{[4
]}

Chateau, F. ^{[4
]}

Corsi, A. ^{[4
]}

Delbart, A. ^{[4
]}

Gheller, J. -M. ^{[4
]}

Giganon, A. ^{[4
]}

Gillibert, A. ^{[4
]}

Lapoux, V. ^{[4
]}

Motobayashi, T. ^{[3
]}

Niikura, M. ^{[6
]}

Paul, N. ^{[4
]}

Rousse, J. -Y. ^{[4
]}

Sakurai, H. ^{[3
,6
]}

Santamaria, C. ^{[4
]}

Steppenbeck, D. ^{[3
]}

Taniuchi, R. ^{[3
,6
]}

Uesaka, T. ^{[3
]}

Ando, T. ^{[3
,6
]}

Arici, T. ^{[7
]}

Blazhev, A. ^{[8
]}

Browne, F. ^{[9
]}

Bruce, A. M. ^{[9
]}

Caroll, R. ^{[10
]}

Chung, L. X. ^{[11
]}

Cortes, M. L. ^{[7
,12
]}

Dewald, M. ^{[8
]}

Ding, B. ^{[13
]}

Flavigny, F. ^{[14
]}

Franchoo, S. ^{[14
]}

Gorska, M. ^{[7
]}

Gottardo, A. ^{[14
]}

Jungclaus, A. ^{[15
]}

Lee, J. ^{[16
]}

Lettmann, M. ^{[12
]}

Linh, B. D. ^{[11
]}

Liu, J. ^{[16
]}

Liu, Z. ^{[13
]}

Lizarazo, C. ^{[7
,12
]}

Momiyama, S. ^{[3
,6
]}

Moschner, K. ^{[8
]}

Nagamine, S. ^{[3
,6
]}

Nakatsuka, N. ^{[3
,17
]}

Nita, C. R. ^{[18
]}

Nobs, C. ^{[9
]}

机构：

[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[3] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

[4] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France

[5] Univ Autonoma Madrid, Dept Fis Teor, Madrid 28049, Spain

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

[7] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[8] Univ Cologne, Inst Kernphys, D-50923 Cologne, Germany

[9] Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England

[10] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[11] VINATOM, Inst Nucl Sci & Tech, 179 Hoang Quoc Viet Rd, Hanoi, Vietnam

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

[13] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[14] Univ Paris Saclay, Univ Paris Sud, Inst Phys Nucl, CNRS IN2P3, F-91406 Orsay, France

[15] CSIC, Inst Estruct Mat, Madrid 28006, Spain

[16] Univ Hong Kong, Dept Phys, Pokfulam, Peoples R China

[17] Kyoto Univ, Fac Sci, Dept Phys, Kyoto 6068502, Japan

[18] Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, R-077125 Bucharest, Romania

[19] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW C | 2017年 / 95卷 / 04期

基金：

日本学术振兴会; 中国国家自然科学基金; 欧洲研究理事会;

关键词：

NUCLEI; COEXISTENCE;

D O I：

10.1103/PhysRevC.95.041302

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 Se-88,Se-90,Se-92,Se-94 isotopes were studied via in-beam gamma-ray spectroscopy after nucleon removal reactions at intermediate energies at the Radioactive Isotope Beam Factory. Based on gamma-gamma coincidence analysis, low-lying excitation level schemes are proposed for these nuclei, including the 2(1)(+), 4(1)(+) states and 2(2)(+) states at remarkably low energies. The low-lying 2(2)(+) states, along with other features, indicate triaxiality in these nuclei. The experimental results are in good overall agreement with self-consistent beyond-mean-field calculations based on the Gogny D1S interaction, which suggests both triaxial degree of freedom and shape coexistence playing important roles in the description of intrinsic deformations in neutron-rich Se isotopes.

引用

页数：6

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