Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei

doi:10.1088/1361-6471/ab33be

	Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei
	Dong, Jianmin 2; Sun, Yang 4; Chen, Fang-Qi 3; Wang, Long-Jun 1
刊名	JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
	2019-10-01
卷号	46 期号:10 页码:16
关键词	high-spin states band crossing quantum chaos
ISSN号	0954-3899
DOI	10.1088/1361-6471/ab33be
通讯作者	Sun, Yang(sunyang@sjtu.edu.cn)
英文摘要	Rotationally-induced chaotic motion in fast-rotating nuclei is investigated using the projected shell model with an aggressively extended multi-quasiparticle configuration space. The two-body Hamiltonian in separable forms with quadrupole-quadrupole plus pairing forces is diagonalized in superimposed states with more than 2000 angular momentum projected configurations. By taking Yb-164 as an example, it is shown that the experimental energies and moment of inertia (MoI) for the yrast band can be clearly described. The variations in MoI are explained in terms of band crossings among the 2-quasiparticle (qp), 4-qp, 6-qp, and 8-qp bands, corresponding to successive pair-breakings caused by rotation. Moreover, the chaotic motion in different spin and excitation regions is studied by quantitatively analyzing the branching number. It is found that the degree of chaoticity increases monotonically with spin and excitation energy. At the highest spins, bands built by different numbers of quasiparticles, with their own characteristic rotational behavior originally at low spins, tend to rotate uniformly with the same rotational frequency, indicating an emergent nuclear collectivity appearing from an extremely chaotic system. The important role played by nucleon pairing in increasing the chaoticity is emphasized.
资助项目	National Key Program for S&T Research and Development[2016YFA0400501] ; National Natural Science Foundation of China[11575112] ; US Department of Energy[DE-FG0297ER41019] ; US Department of Energy[de-sc0008641]
WOS关键词	HIGH-SPIN ; YRAST LEVELS ; BANDS ; CHAOS ; DISCONTINUITY ; ISOTOPES ; PHYSICS ; STATES ; HEAVY ; ONSET
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000482531300002
资助机构	National Key Program for S&T Research and Development ; National Natural Science Foundation of China ; US Department of Energy
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/132734]
专题	中国科学院近代物理研究所
通讯作者	Sun, Yang
作者单位	1.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 3.Northwestern Polytech Univ, Sch Sci, Dept Appl Phys, Xian 710129, Shaanxi, Peoples R China 4.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Dong, Jianmin,Sun, Yang,Chen, Fang-Qi,et al. Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2019,46(10):16.
APA	Dong, Jianmin,Sun, Yang,Chen, Fang-Qi,&Wang, Long-Jun.(2019).Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei.JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,46(10),16.
MLA	Dong, Jianmin,et al."Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei".JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 46.10(2019):16.