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题名: Configuration-constrained cranking Hartree-Fock pairing calculations for sidebands of nuclei
作者: Liang, WY;  Jiao, CF;  Wu, Q;  Fu, XM;  Xu, FR
刊名: PHYSICAL REVIEW C
出版日期: 2015
卷号: 92, 期号:6, 页码:64325
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevC.92.064325
通讯作者: Liang, WY (reprint author), Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
文章类型: Article
英文摘要: Background: Nuclear collective rotations have been successfully described by the cranking Hartree-Fock-Bogoliubov (HFB) model. However, for rotational sidebands which are built on intrinsic excited configurations, it may not be easy to find converged cranking HFB solutions. The nonconservation of the particle number in the BCS pairing is another shortcoming. To improve the pairing treatment, a particle-number-conserving (PNC) pairing method was suggested. But the existing PNC calculations were performed within a phenomenological one-body potential (e.g., Nilsson or Woods-Saxon) in which one has to deal the double-counting problem. Purpose: The present work aims at an improved description of nuclear rotations, particularly for the rotations of excited configurations, i.e., sidebands. Methods: We developed a configuration-constrained cranking Skyrme Hartree-Fock (SHF) calculation with the pairing correlation treated by the PNC method. The PNC pairing takes the philosophy of the shell model which diagonalizes the Hamiltonian in a truncated model space. The cranked deformed SHF basis provides a small but efficient model space for the PNC diagonalization. Results: We have applied the present method to the calculations of collective rotations of hafnium isotopes for both ground-state bands and sidebands, reproducing well experimental observations. The first up-bendings observed in the yrast bands of the hafnium isotopes are reproduced, and the second up-bendings are predicted. Calculations for rotational bands built on broken-pair excited configurations agree well with experimental data. The band-mixing between two K-pi = 6(+) bands observed in Hf-176 and the K purity of the Hf-178 rotational state built on the famous 31 yr K-pi = 16(+) isomer are discussed. Conclusions: The developed configuration-constrained cranking calculation has been proved to be a powerful tool to describe both the yrast bands and sidebands of deformed nuclei. The analyses of rotational moments of inertia help to understand the structures of nuclei, including rotational alignments, configurations, and competitions between collective and single-particle excitations.
类目[WOS]: Physics, Nuclear
关键词[WOS]: HARMONIC-OSCILLATOR BASIS ;  MULTI-QUASI-PARTICLE ;  HIGH-SPIN STATES ;  MEAN-FIELD ;  ROTATIONAL BANDS ;  ISOMER DECAYS ;  ATOMIC-NUCLEI ;  MASS REGION ;  HF-172 ;  EQUATIONS
收录类别: SCI
项目资助者: National Key Basic Research Program of China [2013CB834402] ;  National Natural Science Foundation of China [11235001, 11320101004, 11575007] ;  Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF041CJ1]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20735
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Liang, WY,Jiao, CF,Wu, Q,et al. Configuration-constrained cranking Hartree-Fock pairing calculations for sidebands of nuclei[J]. PHYSICAL REVIEW C,2015,92(6):64325.
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