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

作　　者：叶伟虎 钱以斌 YE Weihu;QIAN Yibin(Department of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学物理学院,南京210094

出　　处：《原子核物理评论》2024年第1期269-275,共7页Nuclear Physics Review

基　　金：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资金资助(30922010312)。

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。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-objective optimization on mass models,we take the mass differencesαdecay energy and the Garvey-Kelson relations as multiple 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 astrophysics,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 

分 类 号：O571.3[理学—粒子物理与原子核物理]