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arXiv 0911.4902nucl-th
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弱束缚核中的同位旋混合和连续谱耦合

Isospin mixing and the continuum coupling in weakly bound nuclei

N. Michel, W. Nazarewicz, M. Ploszajczak

摘要:

本文采用复能组态相互作用的伽莫夫壳模型(Gamow Shell Model)研究了弱束缚核中库仑相互作用引起的同位旋破缺效应。伽莫夫壳模型同时考虑了价核子间的多体关联和连续效应。我们研究了单核子谱因子的近阈行为和沿等多重态的波函数结构。说明性的计算进行了T=1的同量异位素三重态。通过使用壳模型的哈密顿量组成的一个isoscope核相互作用和库仑项,我们表明,对于弱束缚或未束缚系统的同量异位素类似态的结构变化的isotrelet和影响的能量依赖性的光谱因子。我们讨论了部分动力学同位旋对称性存在于同位旋拉伸系统,尽管库仑相互作用,引起大的镜像对称性破缺效应。

英文摘要:

The isospin breaking effects due to the Coulomb interaction in weakly-bound nuclei are studied using the Gamow Shell Model, a complex-energy configuration interaction approach which simultaneously takes into account many-body correlations between valence nucleons and continuum effects. We investigate the near-threshold behavior of one-nucleon spectroscopic factors and the structure of wave functions along an isomultiplet. Illustrative calculations are carried out for the T=1 isobaric triplet. By using a shell-model Hamiltonian consisting of an isoscalar nuclear interaction and the Coulomb term, we demonstrate that for weakly bound or unbound systems the structure of isobaric analog states varies within the isotriplet and impacts the energy dependence of spectroscopic factors. We discuss the partial dynamical isospin symmetry present in isospin-stretched systems, in spite of the Coulomb interaction that gives rise to large mirror symmetry breaking effects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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