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arXiv 1902.06154nucl-th
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核壳层模型的非经验相互作用:一个更新

Non-Empirical Interactions for the Nuclear Shell Model: An Update

S. Ragnar Stroberg, Scott K. Bogner, Heiko Hergert, Jason D. Holt

摘要:

核壳层模型可能是理解原子核结构的最重要的概念和计算范例。虽然壳模型主要用于现象学背景下,已经有努力延伸到半个多世纪,以获得基于核子之间的现实相互作用的壳模型参数。最近,一些从头算多体方法-特别是多体微扰理论,无核壳模型,在介质中相似重整化群,和耦合集团理论-已经发展出提供有效的壳模型哈密顿量的能力。我们提供了一个更新的状态,这些方法,并调查它们之间的连接和潜在的优势和劣势,特别关注在介质中的相似性重整化群的方法。三体的力量被证明是一个重要的组成部分,在理解所需的修改现象学治疗。然后,我们回顾了这些方法与最近的实验测量的比较的一些应用,并得出结论,在从头算壳模型理论的一些剩余的挑战。

英文摘要:

The nuclear shell model has been perhaps the most important conceptual and computational paradigm for the understanding of the structure of atomic nuclei. While the shell model has been predominantly used in a phenomenological context, there have been efforts stretching back over a half century to derive shell model parameters based on a realistic interaction between nucleons. More recently, several ab initio many-body methods---in particular many-body perturbation theory, the no-core shell model, the in-medium similarity renormalization group, and coupled cluster theory---have developed the capability to provide effective shell model Hamiltonians. We provide an update on the status of these methods and investigate the connections between them and potential strengths and weaknesses, with a particular focus on the in-medium similarity renormalization group approach. Three-body forces are demonstrated to be an important ingredient in understanding the modifications needed in phenomenological treatments. We then review some applications of these methods to comparisons with recent experimental measurements, and conclude with some remaining challenges in ab initio shell model theory.

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