Collective and Single-particle Motion in Beyond Mean Field Approaches

TL;DR

This paper introduces a new nuclear energy density functional method that combines collective and single-particle degrees of freedom to accurately predict nuclear spectroscopic properties, demonstrated on 44S with excellent results.

Contribution

A novel symmetry conserving configuration mixing approach that simultaneously considers nuclear deformations and rotational frequencies for detailed spectroscopic calculations.

Findings

Accurately reproduces experimental data for 44S

Achieves agreement with shell model calculations

Provides a versatile framework for nuclear structure studies

Abstract

We present a novel nuclear energy density functional method to calculate spectroscopic properties of atomic nuclei. Intrinsic nuclear quadrupole deformations and rotational frequencies are considered simultaneously as the degrees of freedom within a symmetry conserving configuration mixing framework. The present method allows the study of nuclear states with collective and single-particle character. We calculate the fascinating structure of the semi-magic 44S nucleus as a first application of the method, obtaining an excellent quantitative agreement both with the available experimental data and with state-of-the-art shell model calculations.