标题： 重、形变核中的Gamow-Teller跃迁的壳模型方法 显示英文标题

标题： Shell model method for Gamow-Teller Transitions in heavy, deformed nuclei

摘要： 一种计算Gamow-Teller跃迁率的方法通过使用投影壳模型（PSM）的概念得到发展。 通过叠加角动量投影的多准粒子构型来构建壳模型基底，并通过对这些投影态中的两体相互作用进行对角化来获得核波函数。 详细讨论了PSM框架下跃迁矩阵元的计算，并研究了由Gamow-Teller剩余力和构型混合引起的效应。 利用这种方法，在有限温度下，有可能逐态计算重且变形的核的β衰变和电子俘获率。 我们的第一个例子表明，虽然实验上已知的从母核基态出发的Gamow-Teller跃迁率得到了重现，但预测某些低激发态会有更强的跃迁发生，这可能会显著增强这些核暴露在炽热的星体环境中时的总衰变速率。 显示英文摘要

摘要： A method for calculation of Gamow-Teller transition rates is developed by using the concept of the Projected Shell Model (PSM). The shell model basis is constructed by superimposing angular-momentum-projected multi-quasiparticle configurations, and nuclear wave functions are obtained by digonalizing the two-body interactions in these projected states. Calculation of transition matrix elements in the PSM framework is discussed in detail, and the effects caused by the Gamow-Teller residual forces and by configuration-mixing are studied. With this method, it may become possible to perform a state-by-state calculation for beta-decay and electron-capture rates in heavy, deformed nuclei at finite temperatures. Our first example indicates that, while experimentally known Gamow-Teller transition rates from the ground state of the parent nucleus are reproduced, stronger transitions from some low-lying excited states are predicted to occur, which may considerably enhance the total decay rates once these nuclei are exposed to hot stellar environments.