基于统一方法描述原子核的alpha衰变、结团放射性和冷裂变
Unified Description of the Competition Between α Decay,Cluster Radioactivity and Cold Fission
黎广金 1包小军1
作者信息
- 1. 湖南师范大学物理与电子科学学院,长沙 730000
- 折叠
摘要
基于推广的液滴模型计算了原子核不同自发衰变过程的半衰期.通过考虑亲近势、质量不对称度、准确的核半径、唯象包含了壳修正和对修正的推广液滴模型构建衰变势垒随中心距离的变化.目前的理论计算很好的再现了 alpha衰变和结团放射性的半衰期,并能合理的描述冷裂变的半衰期.计算表明目前版本的推广液滴模型可以在统一框架下合理的描述不同原子核的自发衰变过程的寿命.本文也讨论了电荷不对称度和质量惯量对不同衰变半衰期的影响.
Abstract
Half-lives of spontaneous nuclear decay processes are calculated by a generalized liquid drop model(GLDM).The potential barrier is constructed by a GLDM,taking into account the nuclear proximity,the mass asym-metry,the accurate nuclear radius,the phenomenological shell and pairing correction.The GLDM model is to con-tinue reproducing the experimental data for α decay and cluster radioactivity,as well as to reach a reasonable calcu-lation for the half-lives for cold fission processes.These comparisons show that the GLDM is useful tools to invest-igate these different decay processes in an unified theoretical framework.The influence of macroscopic energy coef-ficient on the potential barrier and half-lives are strongly dependent on the charge asymmetry(ηz=(Z1-Z2)/(Z1+Z2))for the same parent nucleus during the rearrangement process.The influence of inertia coeffi-cient on half lives also depend on the mass asymmetry ηz.
关键词
α衰变/结团放射性/冷裂变/推广液滴模型Key words
alpha decay/cluster radioactivity/cold fission/generalized liquid drop model引用本文复制引用
基金项目
国家自然科学基金资助项目(12175064)
国家自然科学基金资助项目(12175064)
湖南省优秀青年科学基金(2022JJ10031)
湖南省教育厅重点项目(20A290)
出版年
2023
NETL
NSTL
万方数据