Emerging {\gamma}-soft-like spectrum in 196Pt in the SU3-IBM (I)

TL;DR

This paper explores the emergence of a {b3}-soft-like spectrum in 196Pt within the SU3-IBM framework, linking it to shape phase transitions and providing insights into nuclear structure.

Contribution

It introduces a new perspective on {b3}-softness in 196Pt using the SU3-IBM, highlighting a special degenerate point related to shape phase transitions.

Findings

Emergent {b3}-softness in 196Pt explained by the model

Model reproduces low-lying spectra and B(E2) values

Links {b3}-softness to prolate-oblate shape transition

Abstract

Recently, it has been argued that a spherical-like spectrum emerges in the SU3-IBM, opening up new approaches to understand the {\gamma}-softness in realistic nuclei. In a previous paper, {\gamma}-softness with degeneracy of the ground and quasi-{\gamma} bands was observed. In this paper, another special point connected with the middle degenerate point is discussed, which is found to be related with the properties of 196Pt. This emergent {\gamma}-softness has also been shown to be important for understanding the prolate-oblate asymmetric shape phase transition. The low-lying spectra, B(E2) values and quadrupole moments in 196Pt are discussed showing that the new model can account for several observed features. This is the first part of the discussions on the {\gamma}-soft-like spectrum of 196Pt.