Shape coexistence and shape transition in self-conjugate nucleus Kr-72 and the tensor force
文献类型：期刊论文
| 作者 | Kaneko, K.1; Sun, Y.2,3,4; Wadsworth, R.5 |
| 刊名 | PHYSICA SCRIPTA
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 92页码:6 |
| 关键词 | Oblate-prolate shape-coexistence Tensor force Monopoleinteraction Shape transition Self-conjugate nucleus Nucleon-quartet excitation Large-scale shell-model |
| ISSN号 | 0031-8949 |
| DOI | 10.1088/1402-4896/aa8fdc |
| 英文摘要 | Oblate-prolate shape-coexistence is well-known in the N = Z nucleus Kr-72. Furthermore, recent experimental data implies that there is a rapid shape transition at very low spins in this nucleus. We reinvestigate this problem by using large-scale shell-model calculations with the monopole interactions derived from the monopole-based universal force that contains the tensor force in the Hamiltonian. We show that in Kr-72, states with nucleon-quartet excitation from the pf shell to the g(9/2)-d(5/2) orbits, which favor large prolate deformation, compete with those having the pf shell as the main configuration with oblate deformation. These shapes can coexist if the two types of states reside closely in excitation energy. In Kr-72 the tensor force is found to provide precisely such a coexistence condition near the ground state. As the tensor effect changes dynamically with orbital occupation when the nucleus rotates, a rapid shape transition can occur. |
| WOS关键词 | PROJECTED SHELL-MODEL ; MICROSCOPIC ASPECTS ; PHASE-TRANSITION ; MASS REGION ; BETA-DECAY ; COLLECTIVITY ; ROTATION ; SE-68 |
| 资助项目 | National Natural Science Foundation of China[11575112] ; 973 Program of China[2013CB834401] ; National Key Research and Development Program[2016YFA0400501] ; York by the UK STFC[ST/L005727/1] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000413746400004 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; 973 Program of China ; National Key Research and Development Program ; York by the UK STFC |
| 源URL | [http://119.78.100.186/handle/113462/45956]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Sun, Y. |
| 作者单位 | 1.Kyushu Sangyo Univ, Dept Phys, Fukuoka 8138503, Japan 2.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 3.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, Shanghai 200240, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 5.Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England |
| 推荐引用方式 GB/T 7714 | Kaneko, K.,Sun, Y.,Wadsworth, R.. Shape coexistence and shape transition in self-conjugate nucleus Kr-72 and the tensor force[J]. PHYSICA SCRIPTA,2017,92:6. |
| APA | Kaneko, K.,Sun, Y.,&Wadsworth, R..(2017).Shape coexistence and shape transition in self-conjugate nucleus Kr-72 and the tensor force.PHYSICA SCRIPTA,92,6. |
| MLA | Kaneko, K.,et al."Shape coexistence and shape transition in self-conjugate nucleus Kr-72 and the tensor force".PHYSICA SCRIPTA 92(2017):6. |
入库方式： OAI收割
来源：近代物理研究所
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