An empirical formula of nuclear β-decay half-lives with the transition-strength contribution  

作　　者：Lei Tian Wei-Feng Li Ji-Yu Fang Zhong-Ming Niu 田蕾;李伟峰;方基宇;牛中明

机构地区：[1]School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China [2]School of Mechanics and Photoelectric Physics,Anhui University of Science and Technology,Huainan 232001,China

出　　处：《Chinese Physics C》2025年第4期179-185,共7页中国物理C(英文版)

基　　金：supported by the National Natural Science Foundation of China(12375109,11875070,11935001);the Anhui Project(Z010118169);the Key Research Foundation of Education Ministry of Anhui Province,China(2023AH050095)。

摘　　要：An empirical formula of nuclearβ-decay half-lives is proposed by including the transition-strength contribution.The inclusion of the transition-strength contribution can reduce nuclearβ-decay half-lives by about an order of magnitude,and its effect gradually increases toward the neutron-rich or heavy nuclear regions.For nuclearβ-decay half-lives less than 1 s,the empirical formula can describe the experimental data within approximately2 times,which is more accurate than the sophisticated microscopic models.The transition-strength contribution can also be effectively considered by refitting the parameters of other empirical formulas without the transition-strength term although they will still significantly deviate from the new empirical formula in light or heavy neutron-rich nuclear regions.This indicates that the inclusion of the transition-strength contribution in the empirical formula is crucial for the global description of nuclearβ-decay half-lives.The extrapolation ability of the new empirical formula was verified by the newly measuredβ-decay half-lives.

关 键 词：β-decay half-lives transition strength empirical formula 

分 类 号：O571.1[理学—粒子物理与原子核物理]