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题名: Novel triaxial structure in low-lying states of neutron-rich nuclei around A approximate to 100
作者: Xiang, J; Yao, JM; Fu, Y; Wang, ZH; Li, ZP; Long, WH
收录类别: SCIE
出版日期: 2016-05-25
刊名: PHYSICAL REVIEW C
卷号: 93, 期号:5
出版者: AMER PHYSICAL SOC
出版地: COLLEGE PK
英文摘要: Background: In recent years, the study of triaxiality in the low-lying states of atomic nuclei with transition character or shape coexistence has been of great interest. Previous studies indicate that the neutron-rich nuclei in the A similar to 100 mass region with Z similar to 40, N similar to 60 serve as good grounds for examining the role of triaxiality in nuclear low-lying states. Purpose: The aim of this work is to provide a microscopic study of low-lying states for nuclei in the A similar to 100 mass regions and to examine in detail the role of triaxiality in the shape-coexistence phenomena and the variation of shape with the isospin and spin values at the beyond mean-field level. Method: The starting point of our method is a set of relativistic mean-field plus BCS wave functions generated with a constraint on triaxial deformations (beta, gamma). The excitation energies and electric multipole transition strengths of low-lying states are calculated by solving a five-dimensional collective Hamiltonian (5DCH) with parameters determined by the mean-field wave functions. Results: The low-lying states of Mo isotopes and of N = 60 isotones in the A similar to 100 mass region are calculated. The results indicate that triaxiality is essential to reproduce the data of excitation energies and electric quadrupole transition strengths in low-lying states and plays an important role in the shape evolution as a function of nucleon number. However, the decrease of nuclear collectivity with the increase of angular momentum in neutron-rich Mo isotopes has not been reproduced. Conclusions: The evolution of nuclear collectivity in the low-lying states of neutron-rich nuclei in the A similar to 100 mass region as a function of nucleon number is governed by the novel triaxial structure. However, the mechanism that governs the variation of nuclear shape with spin in Mo isotopes remains unclear and deserves further investigation by taking into account the effects other than the collective motions.
作者部门: [Xiang, J. ; Wang, Z. H. ; Long, W. H.] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China ; [Xiang, J.] Qiannan Normal Univ Nationalities, Dept Phys & Elect Sci, Duyun 558000, Peoples R China ; [Xiang, J. ; Yao, J. M. ; Li, Z. P.] Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China ; [Yao, J. M.] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27516 USA ; [Fu, Y.] Guizhou Minzu Univ, Coll Sci, Guiyang, Peoples R China
通讯作者: Long, WH (reprint author), Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China.
学科分类: Physics
文章类型: Article
所属项目编号: NSFC [11375076, 11475140, 11305134, 11575148] ; Natural Science Foundation of Chongqing [cstc2011jjA0376] ; Specialized Research Fund for the Doctoral Program of Higher Education [20130211110005] ; Tohoku University Focused Research Project "Understanding the origins for matters in universe"
所属项目名称: 国家自然科学基金项目 ; 高等学校博士学科点专项科研基金
项目资助者: NSFC ; MOE
语种: 英语
DOI: 10.1103/PhysRevC.93.054324
ISSN号: 2469-9985
WOS记录号: WOS:000376640000001
IR记录号: WOS:000376640000001
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/181031
Appears in Collections:核科学与技术学院_期刊论文

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Recommended Citation:
Xiang, J,Yao, JM,Fu, Y,et al. Novel triaxial structure in low-lying states of neutron-rich nuclei around A approximate to 100[J]. PHYSICAL REVIEW C,2016,93(5).
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