发表机构
School of Physics and Astronomy, Shanghai Jiao Tong University; School of Physical Science and Technology, Southwest University(上海交通大学物理与天文学院; 西南大学物理科学与技术学院)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
提出一种基于物理指导组态空间和Pfaffian算法的投影壳模型方法,用于计算任意重形变核的能级密度,以$^{164}$Dy为例精确求解,揭示拆对区域结构行为需修正,影响中子俘获截面。
AI 中文摘要
我们提出一种壳模型方法,用于计算核能级密度(NLD),该方法普遍适用于任意重形变核。该方法的新颖之处在于,我们利用物理指导来构建其组态空间,并通过Pfaffian算法实现了计算上的突破。以形变良好的偶偶核$^{164}$Dy为例,我们精确求解本征值方程,获得大量具有角动量和宇称的本征态集合。我们的结果表明,在拆对区域,可能需要修正对结构行为的一些常见理解,在该区域,复合核NLD中的结构变化将对中子俘获截面敏感。
英文摘要
We introduce a shell model method for calculating nuclear level density (NLD) generally applicable for arbitrarily heavy deformed nuclei. The method is novel because of our use of physical guidance for the construction of its configuration space and the computational breakthrough with the Pfaffian algorithm. Taking a well deformed even-even $^{164}$Dy nucleus as an example, we solve exactly the eigenvalue equation to obtain a large ensemble of eigenstates of angular momentum and parity. Our results indicate a potential need to revise some common understanding of the structural behavior in the pair-breaking region where the structure changes in NLD of the compound nuclei would be sensitive for cross-sections of neutron capture.