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arXiv 2007.11470nucl-th
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壳模型有效哈密顿量和有效算子的微扰方法

Perturbative Approach to Effective Shell-Model Hamiltonians and Operators

L. Coraggio, N. Itaco

摘要:

这项工作的目的是提出一个概述的推导有效壳模型的哈密顿量和衰变运营商在多体微扰理论,并显示结果的基础上,他们的利用率选择壳模型的研究。更确切地说,我们报告了一些技术细节,需要由非专家接近推导壳模型哈密顿量和运营商从现实的核势开始,为了提供一些指导,壳模型计算的单粒子能量,两体矩阵元素的剩余相互作用,有效电荷和衰变矩阵元素,都没有诉诸经验调整。在此基础上,我们将给出重质量核双β衰变的研究结果,并从理论上推导出壳模型成分,以评估这种方法对壳模型研究的可靠性。注意力也将集中在与微扰膨胀的行为有关的方面,这些方面的知识是建立原子核结构计算方法的限制和前景所必需的。

英文摘要:

The aim of this work is to present an overview of the derivation of the effective shell-model Hamiltonian and decay operators within many-body perturbation theory, and to show the results of selected shell-model studies based on their utilisation. More precisely, we report some technical details that are needed by non-experts to approach the derivation of shell-model Hamiltonians and operators starting from realistic nuclear potentials, in order to provide some guidance to shell-model calculations where the single-particle energies, two-body matrix elements of the residual interaction, effective charges and decay matrix elements, are all obtained without resorting to empirical adjustments. On the above grounds, we will present results of studies of double-beta decay of heavy-mass nuclei where shell-model ingredients are derived from theory, so to assess the reliability of such a way to shell-model investigations. Attention will be also focussed on the relevant aspects that are connected to the behavior of the perturbative expansion, whose knowledge is needed to establish limits and perspectives of this approach to nuclear structure calculations.

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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