Reduction of collectivity at very high spins in Nd-134: Expanding the projected-shell-model basis up to 10-quasiparticle states

doi:http://dx.doi.org/10.1103/PhysRevC.93.034322

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	Reduction of collectivity at very high spins in Nd-134: Expanding the projected-shell-model basis up to 10-quasiparticle states
	Wang, LJ ; Sun, Y 1,2; Mizusaki, T 3; Oi, M 3; Ghorui, SK
刊名	PHYSICAL REVIEW C
	2016
卷号	93 期号:3 页码:34322
关键词	ANGULAR-MOMENTUM LIFETIME MEASUREMENTS NUCLEAR-STRUCTURE MATRIX-ELEMENTS SPECTROSCOPY INERTIA YB-166 HEAVY BANDS CHAOS
DOI	http://dx.doi.org/10.1103/PhysRevC.93.034322
英文摘要	Background: The recently started physics campaign with the new generation of gamma-ray spectrometers, "GRETINA" and "AGATA," will possibly produce many high-quality gamma rays from very fast-rotating nuclei. Microscopic models are needed to understand these states. Purpose: It is a theoretical challenge to describe high-spin states in a shell-model framework by the concept of configuration mixing. To meet the current needs, one should overcome the present limitations and vigorously extend the quasiparticle (qp) basis of the projected shell model (PSM). Method: With the help of the recently proposed Pfaffian formulas, we apply the new algorithm and develop a new PSM code that extends the configuration space to include up to 10-qp states. The much-enlarged multi-qp space enables us to investigate the evolutional properties at very high spins in fast-rotating nuclei. Results: We take Nd-134 as an example to demonstrate that the known experimental yrast and the several negative-parity side bands in this nucleus could be well described by the calculation. The variations in moment of inertia with spin are reproduced and explained in terms of successive band crossings among the 2-qp, 4-qp, 6-qp, 8-qp, and 10-qp states. Moreover, the electric quadrupole transitions in these bands are studied. Conclusions: A pronounced decrease in the high-spin B(E2) of Nd-134 is predicted, which suggests reduction of collectivity at very high spins because of increased level density and complex band mixing. The possibility for a potential application of the present development in the study of highly excited states in warm nuclei is mentioned.
学科主题	Physics
语种	英语
资助机构	National Natural Science Foundation of China [11575112, 11135005] ; 973 Program of China [2013CB834401] ; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF141CJ1]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23295]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Wang, Long-Jun; Sun, Yang; Ghorui, Surja K.] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Senshu Univ, Inst Nat Sci, Chiyoda Ku, 3-8-1 Kanda Jinbocho, Tokyo 1018425, Japan
推荐引用方式 GB/T 7714	Wang, LJ,Sun, Y,Mizusaki, T,et al. Reduction of collectivity at very high spins in Nd-134: Expanding the projected-shell-model basis up to 10-quasiparticle states[J]. PHYSICAL REVIEW C,2016,93(3):34322.
APA	Wang, LJ,Sun, Y,Mizusaki, T,Oi, M,&Ghorui, SK.(2016).Reduction of collectivity at very high spins in Nd-134: Expanding the projected-shell-model basis up to 10-quasiparticle states.PHYSICAL REVIEW C,93(3),34322.
MLA	Wang, LJ,et al."Reduction of collectivity at very high spins in Nd-134: Expanding the projected-shell-model basis up to 10-quasiparticle states".PHYSICAL REVIEW C 93.3(2016):34322.