Recent progress in configuration-interaction shell model

TL;DR

This paper reviews recent advancements in the configuration-interaction shell model (CISM) and related nuclear models, highlighting progress in understanding exotic nuclei, mirror nuclei, and effective Hamiltonians near key nuclear regions.

Contribution

It provides a comprehensive overview of recent developments in CISM and related models, emphasizing new applications and theoretical improvements in nuclear structure studies.

Findings

Progress in investigating cross-shell excitation in exotic nuclei

Development of effective Hamiltonians near 132Sn and 208Pb

Validation of related models like NPA, MCSM, PSM, and GSM

Abstract

Since Mayer and Jensen employed the single-particle shell model to interpret the magic numbers, various microscopic nuclear models have been developed to study the nuclear force and structure. The confguration-interaction shell model (CISM), performed in truncated model space with the inclusion of the residual interaction, is one widely-used nuclear structure model. In the last decade, CISM has progressed in investigating the cross-shell excitation in exotic light nuclei, the similarity and diference in mirror nuclei, and the isomerism and seniority conservation in medium and heavy nuclei. Additionally, researchers have attempted to construct effective Hamiltonians for nuclei near 132Sn and 208Pb through a unifed way in the CISM framework. In parallel, related models, including the nucleon-pair approximation (NPA) approach, the Monte Carlo shell model (MCSM), the projected shell model (PSM), the Gamow shell model (GSM), etc., have also been extensively developed and validated in the last decade. This paper reviews the recent progress in CISM and some related models.