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Spontaneous Fission Barriers Based on a Generalized Liquid Drop Model

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文摘 The barrier against the spontaneous fission has been determined within the Generalized Liquid Drop Model (GLDM) including the mass and charge asymmetry, and the proximity energy. The shell correction of the spherical parent nucleus is calculated by using the Strutinsky method, and the empirical shape-dependent shell correction is employed during the deformation process. A quasi-molecular shape sequence has been defined to describe the whole process from one-body shape to two-body shape system, and a two-touching-ellipsoid is adopted when the superdeformed one-body system reaches the rupture point. On these bases the spontaneous fission barriers are systematically studied for nuclei from ~(230)Th to ~(249)Cm for different possible exiting channels with the different mass and charge asymmetries. The double, and triple bumps are found in the fission potential energy in this region, which roughly agree with the experimental results. It is found that at around Sn-like fragment the outer fission barriers are lower, while the partner of the Sn-like fragment is in the range near ~(108)Ru where the ground-state mass is lowered by allowing axially symmetric shapes. The preferable fission channels are distinctly pronounced, which should be corresponding to the fragment mass distributions.
来源 Communications in Theoretical Physics ,2014,61(5):629-635 【核心库】
DOI 10.1088/0253-6102/61/5/15
关键词 spontaneous fission ; generalized liquid drop model ; shell correction
地址

1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000  

2. School of Nuclear Science and Technology, Lanzhou University, State Key Laboratory of Theoretical Physics, Lanzhou, 730000

语种 英文
文献类型 研究性论文
ISSN 0253-6102
学科 物理学
基金 国家自然科学基金 ;  the Fundamental Research Funds for the Central Universities ;  中国科学院知识创新工程项目
文献收藏号 CSCD:5130245

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引证文献 1 篇

1 Wang Yanzhao Two-proton radioactivity of exotic nuclei beyond proton drip-line Communications in Theoretical Physics,2021,73(7):075301
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