Beyond Wigner's isobaric multiplet mass equation: Effect of charge-symmetry-breaking interaction and Coulomb polarization
Beyond Wigner's isobaric multiplet mass equation: Effect of charge-symmetry-breaking interaction and Coulomb polarization
复制标题
超越维格纳的等量重态质量方程：电荷对称性破缺相互作用和库仑极化的影响
DOI：
10.1103/physrevc.99.014319
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发表时间：
2019
影响因子：
3.1
通讯作者：
Sun Y.
中科院分区：
文献类型：
--
作者：
Dong J. M.;Gu J. Z.;Zhang Y. H.;Zuo W.;Wang L. J.;Litvinov Yu A.;Sun Y.
等压多重态质量方程（IMME）的二次形式最初是由Wigner提出的，并被普遍认为是有效的，但最近的高精度核质量测量却对它提出了严重的质疑。通常解决这个问题的方法是根据经验增加三次项和四次项，以表征与IMME的偏差，但找到这些项的起源仍然是一个未解决的困难。基于一种超越Wigner一阶微扰的策略，我们明确地导出了三次项和四次项。这些条款被证明是产生的有效的电荷对称性破缺和电荷独立性破缺相互作用的核介质结合库仑极化效应。对上、下壳层的计算揭示了系统性的周期项的出现，表明与原始的IMME存在普遍的偏差。有趣的是，偏差的大小表现出类似振荡的行为与质量数，调制的壳效应。
The quadratic form of the isobaric multiplet mass equation (IMME), which was originally suggested by Wigner and has been generally regarded as valid, is seriously questioned by recent high-precision nuclear mass measurements. The usual resolution to this problem is to add empirically the cubic and quarticterms to characterize the deviations from the IMME, but finding the origin of these terms remains an unsolved difficulty. Based on a strategy beyond Wigner's first-order perturbation, we derive explicitly the cubic and quarticterms. These terms are shown to be generated by the effective charge-symmetry-breaking and charge-independence-breaking interactions in the nuclear medium combined with the Coulomb polarization effect. Calculations for theand lowershells explore a systematic emergence of the cubicterm, suggesting a general deviation from the original IMME. Intriguingly, the magnitude of the deviation exhibits an oscillation-like behavior with mass number, modulated by the shell effect.