在<i>T</i> = 3同位旋七重态中检验同位旋多重态质量方程的正确性

在T = 3同位旋七重态中检验同位旋多重态质量方程的正确性

摘要: 研究由同位旋对称性衍生出来的同位旋多重态质量方程(IMME)是否有效对于同位旋这一基本概念具有重要的意义。最近，在A=54同位旋七重态中发现同位旋多重态质量方程发生了严重破缺，该体系也是迄今为止IMME有效性被检验过的最大同位旋体系。受这项工作启发，基于原子核质量测量实验的最新结果重新审视了一些同位旋相似态的质量，发现A = 50和46的同位旋七重态体系中，同位旋多重态质量方程有效。而且，得到的方程系数能够很好地符合系统性规律。此外，预言了⁵⁰Ni和⁴⁶Fe的质量过剩分别为−3932(20) keV和898(67) keV。

Abstract: The validity of the isobaric multiplet mass equation(IMME) is of foundamental importance due to the basic concept of isospin. Recently, a serious breakdown was found in the A = 54, T = 3 isospin septet, the largest isospin system where the validity of IMME have been tested up to now. Inspired by this work, I revist the mass of some isobaric analogue states with the help of recent results from advanced mass measurement experiment. It is found that the IMME holds well in A = 50 and 46 isospin septet and the coefficients of IMME also follow the systematic trends. Mass excess value for ⁵⁰Ni and ⁴⁶Fe, is predicted to be -3932(20) keV and 898(67) keV, respectively.