Pairing and isospin symmetry in proton-rich nuclei
Pairing and isospin symmetry in proton-rich nuclei
复制标题
富质子核中的配对和同位旋对称性
DOI：
10.1016/s0370-2693(96)01294-4
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发表时间：
1996
影响因子：
4.4
通讯作者：
Petr Vogel
中科院分区：
文献类型：
--
作者：
Jonathan Engel;K. Langanke;Petr Vogel
与较轻的对应物不同，大多数质量 A > 40 的奇奇 N = Z 核具有同位旋 T = 1 的基态，这表明等矢量配对相互作用的作用增强。这种相互作用的简单 SO(5) 类资历模型揭示了 N = Z 附近的类粒子和中子-质子等向量对之间存在引人注目且迄今为止未被注意到的相互作用，这反映在作为 A 和 T 函数的每种对的数量中。尽管同时存在等标量对、变形和其他相关性，大规模壳模型计算也表现出相同的趋势。
Unlike their lighter counterparts, most odd-odd N = Z nuclei with mass A > 40 have ground states with isospin T = 1, suggesting an increased role for the isovector pairing interaction. A simple SO(5) seniority-like model of this interaction reveals a striking and heretofore unnoticed interplay between like-particle and neutron-proton isovector pairing near N = Z that is reflected in the number of each kind of pair as a function of A and T. Large scale shell-model calculations exhibit the same trends, despite the simultaneous presence of isoscalar pairs, deformation, and other correlations.