天体环境下^(66)Fe的电子俘获几率计算  

Calculations of electron capture rates of ^(66)Fe in astrophysical enviroment

作　　者：秦文韬 支启军[1,2] 杨友昌 Qing Wen-Tao;Zhi Qi-Jun;Yang You-Chang(School of Physics and Electronic Science,Guizhou Normal University,Guiyang 550001,China;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing,Guizhou Normal University,Guiyang 550001,China;Guizhou University of Engineering Science,Bijie 551700,China;Zunyi Normal University,Zunyi 563006,China)

机构地区：[1]贵州师范大学物理与电子科学学院,贵阳550001 [2]贵州师范大学贵州省射电天文数据处理重点实验室,贵阳550001 [3]贵州工程应用技术学院,毕节551700 [4]遵义师范学院,遵义563006

出　　处：《物理学报》2022年第19期39-44,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12273008,11865019,U1731238);贵州省科学技术基金(批准号:(2016)4008,[2017]5726-37,[2018]5769-02);贵州省教育厅(批准号:黔科合KY字[2020]003号)资助的课题。

摘　　要：弱相互作用几率的计算对于原子核物理和核天体物理具有非常重要的作用.本文选取在天体环境中非常重要的核素^(66)Fe,考虑一级禁戒跃迁,利用壳模型计算了^(66)Fe在不同天体环境下的电子俘获几率,着重考察了容许Gamow-Teller跃迁和禁戒跃迁的贡献.结果发现,在一些天体环境下,禁戒跃迁对于电子俘获几率有重要贡献,其中非唯一型禁戒跃迁起主要作用.我们的结果对于研究原子核弱相互作用和天体环境下的核素合成和演化具有重要作用.The calculation of weak interaction rates plays a very important role in studying nuclear physics and nuclear astrophysics.In this work,we calculate the electron capture rate of^(66)Fe in the framework of shell model.We mainly focus on the contribution of allowed transition and forbidden transition to the total rate.It is found that in some astrophysical environments the forbidden transition is very important in contribution to the electron capture rate,in which the non-unique forbidden transition plays a major role.This is very important for nuclear structures and astrophysics.

关 键 词：电子俘获几率 容许跃迁 禁戒跃迁 天体环境 

分 类 号：P14[天文地球—天体物理]