A≈130质量区附近丰中子核素的大型壳模型计算与分析

It is one of the hottest topics that research on the structure of the nuclei in A≈130 mass region in both nuclear physics and nuclear astrophysics. In this region, there are the double magic nucleus 132Sn that is the one furthest away from stable line, the unstable nuclei attended actively in the nuclear astrophysics, as well as many isomers, which get well attention in both theory and experiment. In the present work, according to the experimental data the rich neutron nuclei in A≈130 mass region will be calculated and analyzed by a large-scale shell model. The relationship between core-excitation and energy gap in main shell, the structure properties of unstable nuclei will be studied, as well as the shell structure evolution from the neutron drop line to the stable nuclei. Furthermore the isomer near 132Sn will be studied, which is also a nice work in nuclear structure and nuclear astrophysics. According to experiment, there are many isomers near 132Sn, especially in hole-nuclei. These above will give a reliable theoretical supporting to the nuclear structure, nuclear reaction, nuclear astrophysics and the nuclear energy development.

质量数A≈130附近原子核结构的研究是核物理与核天体物理关注的热点课题之一，该核区实验数据较为丰富，不仅有离稳定线最远的双幻核132Sn，还存在许多核天体物理关注的不稳定核，以及大量的同核异能态（Isomer）。本课题拟采用大型壳模型计算，对A≈130质量区附近的丰中子核素进行系统的研究，探索壳心激发与主壳层能隙的联系，进一步讨论不稳定核的结构与性质，弄清从中子滴线到稳定核区的壳层演化规律。同核异能态的研究也是核物理与核天体物理的热点课题之一，本课题还将系统研究132Sn双幻核附近的同核异能态，尤其是空穴核同核异能态，讨论同核异能态的特殊结构、能量与寿命等，预言该核区可能存在的同核异能态。 这些研究可以为核结构、核反应、核天体物理以及核能的应用提供可靠的理论支持。

青年基金项目“A≈130质量区附近丰中子核素的大型壳模型计算与分析”于2015年8月立项，2018年12月底完成，项目研究成果累计发表SCI二区及核心期刊论文6篇，2018年获批软件著作权两项。近三年来在项目的资助下参加全国核物理大会、全国核结构大会等与课题相关的学术会议7次，累计正式的口头报告5次。项目完成了对A=129质量区空穴核的计算分析，研究内容获得了国内外专家同行的认可，相关成果发表在《Physical Review C》的Rapid communication上，2019年2月该文章中预言的能级被实验证实。项目还完成了粒子-空穴核区有效相互作用的试验，并对附近的Sb 同位素的能级结构、壳芯激发以及电磁跃迁作了初步分析，相关成果在《Physical Review C》上发表并引起了实验专家的关注。此外，在该项目的资助下，对大型壳模型计算数据的智能处理也取得了初步成果，于2018年获批计算机软件著作权两项。