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Diffusion Monte Carlo calculations of three-body systems

ISSN号：1674-1137
期刊名称：Chinese Physics C
时间：0
页码：1065-1068
分类：O562[理学—原子与分子物理;理学—物理] O571.43[理学—粒子物理与原子核物理;理学—物理]
作者机构：[1]School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China, [2]Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China, [3]Kavli Institute for Theoretical Physics China (KITPC), and the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190, China
相关基金：Supported by the National Natural Science Foundation of China under Grant Nos. 11175074, 11120101005, 11105035, and 10805061, the Fundamental Research Funds for the Central Universities under Grant No. lzujbky-2012-5, the Knowledge Innovation Project of the Chinese Academy of Sciences under Grant No. KJCX2-EW-N01
相关项目：电子和不稳定原子核弹性散射的理论研究

作者： Lu Meng-Jiao|Ren Zhong-Zhou|Lin Qi-Hu|

关键词：广义液滴模型, 自发裂变, 形状描述, 质量分布, 不对称性, 能量范围, 变形过程, 分子形状, spontaneous fission, generalized liquid drop model, shell correction

中文摘要：

对自发的分裂的障碍包括团和费用在概括液体落下模型(GLDM ) 以内被决定了不对称现象，和最近精力。球形的父母原子核的壳修正被使用 Strutinsky 方法计算，并且实验形状依赖者壳修正在变丑过程期间被采用。一个伪分子的形状序列被定义从一个身体形状描述整个进程到二身体的形状系统，并且当 superdeformed 一个身体系统到达破裂点时， two-touching-ellipsoid 被采用。在这些底上，自发的分裂障碍系统地从 ²³⁰ Th 到 ²⁴⁹ 为有不同的团和费用不对称现象的不同可能的退出隧道的厘米。双、三倍的肿块在这个区域在分裂势能被发现，它粗略地同意试验性的结果。它被发现那在在象 Sn 一样碎片附近，外部分裂障碍是更低的，当象 Sn 一样碎片的搭挡在范围时，接近 ¹⁰⁸ 地面状态团被允许向轴的方向降低的 Ru 对称的形状。更好的分裂隧道清楚地被读，它应该相应于碎片团分布。

英文摘要：

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 6mp10yed 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 2a~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 l~SRu 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.

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