多重物理约束下Duflo-Zuker核质量模型的研究
Study of Multiple Physical Constraints on the Duflo-Zuker Nuclear Mass Model
叶伟虎 1钱以斌1
作者信息
- 1. 南京理工大学物理学院,南京 210094
- 折叠
摘要
原子核质量在核物理和核天体研究中扮演着十分重要的角色.尽管当前的理论模型可较好地描述已知核素的质量,但不同模型在外推时,尤其是丰中子区,仍然存在许多争议.本工作回顾了我们近年来在核质量模型外推研究的主要成果,即使用严格的多目标优化算法将核素质量差α衰变能和局域质量关系作为限制条件,缓和质量模型中的过拟合问题,在一定程度上提升模型的外推能力.另外,还将被优化过的质量数据应用在核天体物理中的快速中子俘获过程中,进一步地检验外推的可靠性.
Abstract
Nuclear mass plays an important role in both nuclear physics and astrophysics.While the theoretical accuracy of masses has reached quite astonishing accuracy,their extrapolations have been conflicting,especially in neutron-rich regions.This paper reviews the main results of the extrapolations of nuclear mass models in recent years.By using a rigorous multi-ob-jective optimization on mass models,we take the mass differences α decay energy and the Garvey-Kelson relations as mul-tiple physical constraints to reduce the degree of overfitting phenomenon,resulting that the predictive power of models was improved in some degree.In addition,we use the improved mass data for the rapid neutron capture processes in nuclear astro-physics,further validating the reliability of the extrapolations.
关键词
原子核质量/α衰变能/多目标优化/快速中子俘获Key words
nuclear mass/α decay energy/multi-objective optimization/rapid neutron capture process引用本文复制引用
基金项目
国家自然科学基金资助项目(12075121)
中央高校基本科研业务费专项(30922010312)
出版年
2024
NETL
NSTL
万方数据