Shape coexistence and shape transition in self-conjugate nucleus 72Kr and the tensor force

doi:10.1088/1402-4896/aa8fdc

	Shape coexistence and shape transition in self-conjugate nucleus 72Kr and the tensor force
	Kaneko,K 1; Sun,Y 2,3,4; Wadsworth,R 5
刊名	Physica Scripta
	2017-10-24
卷号	92
关键词	Oblate-prolate shape-coexistence Tensor force Monopoleinteraction Shape transition Self-conjugate nucleus Nucleon-quartet excitation Large-scale shell-model 21.10.Sf 21.30.Fe 21.60.Cs 27.50.+e
ISSN号	0031-8949
DOI	10.1088/1402-4896/aa8fdc
英文摘要	Abstract Oblate-prolate shape-coexistence is well-known in the N?=?Z nucleus 72Kr. 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 72Kr, 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 72Kr 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.
资助项目	York by the UK STFC[ST/L005727/1]
WOS关键词	PROJECTED SHELL-MODEL ; MICROSCOPIC ASPECTS ; PHASE-TRANSITION ; MASS REGION ; BETA-DECAY ; COLLECTIVITY ; ROTATION ; SE-68
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0031-8949-92-11-AA8FDC
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/24544]
专题	中国科学院近代物理研究所
作者单位	1.Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503, Japan 2.Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China 3.Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China 4.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China 5.Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
推荐引用方式 GB/T 7714	Kaneko,K,Sun,Y,Wadsworth,R. Shape coexistence and shape transition in self-conjugate nucleus 72Kr and the tensor force[J]. Physica Scripta,2017,92.
APA	Kaneko,K,Sun,Y,&Wadsworth,R.(2017).Shape coexistence and shape transition in self-conjugate nucleus 72Kr and the tensor force.Physica Scripta,92.
MLA	Kaneko,K,et al."Shape coexistence and shape transition in self-conjugate nucleus 72Kr and the tensor force".Physica Scripta 92(2017).