Properties of N=90 Isotones within the Mean Field Perspective

TL;DR

This study employs mean field calculations to analyze the properties of N=90 isotones, focusing on deformation, shape coexistence, and comparison with experimental data, highlighting the onset of deformation in this nuclear region.

Contribution

It provides a detailed mean field analysis of N=90 isotones, including shape coexistence and comparison with beyond mean-field approaches, advancing understanding of nuclear structure at this neutron number.

Findings

N=90 isotones mark the onset of nuclear deformation.

Calculated moments of inertia and quadrupole moments agree with experimental data.

Shape coexistence phenomena are observed and discussed.

Abstract

In recent years, the N=90 isotones have been investigated to a large extent in relation to studies of quantum phase transitions. In this paper, we use the mean field approach with pairing-deformation self consistent Total Routhian Surface (TRS) calculations to study the N=90 isotones and neigh- bouring nuclei. The important probes, such as moments of inertia, quadrupole moments, the energy ratio of E(4+1)/E(2+1), octupole and hexadecapole degrees of freedom are considered and the cal- culated results are compared with the available experimental data. From a microscopic point of view, the N=90 isotones characterize the onset of the deformed region and are very well described by mean field calculations. The results are compared with those from other studies in beyond mean-field approximations. Shape coexistence phenomena in the region of interest are discussed.