Microscopic study of neutron-rich Dysprosium isotopes

TL;DR

This paper uses the pseudo-SU(3) symmetry-based model to systematically study the structure and transition properties of neutron-rich Dysprosium isotopes, successfully describing rotational features and extrapolating to heavier isotopes.

Contribution

It introduces a systematic application of the pseudo-SU(3) model with parametrized terms to heavy, neutron-rich nuclei, enabling detailed microscopic analysis.

Findings

Successful description of rotational features in 160-168Dy

Systematic extrapolation to 170Dy

Effective modeling of transition strengths and band structures

Abstract

Microscopic studies in heavy nuclei are very scarce due to large valence spaces involved. This computational problem can be avoided by means of the use of symmetry based models. Ground-state, gamma and beta-bands, and their B(E2) transition strengths in 160-168Dy isotopes, are studied in the framework of the pseudo-SU(3) model which includes the preserving symmetry Q.Q term and the symmetry-breaking Nilsson and pairing terms, systematically parametrized. Additionally, three rotor-like terms are considered whose free parameters, fixed for all members of the chain are used to fine tune the moment of inertia of rotational bands and the band-head of gamma and beta-bands. The model succesfully describes in a systematic way rotational features in these nuclei and allows to extrapolate toward the midshell nucleus 170Dy. The results presented show that it is possible to study full chain of isotopes or isotones in the region with the present model.