Shape Coexistence in Hot Rotating 100 Nb

TL;DR

This paper investigates temperature and angular momentum effects on shape coexistence in hot rotating 100 Nb using statistical and microscopic models, revealing new shape coexistence phenomena and their impact on nuclear properties.

Contribution

It reports the first observation of shape coexistence between oblate and prolate non-collective shapes in excited hot rotating 100 Nb at mid-spin values.

Findings

Shape coexistence between oblate and triaxial shapes in 104 Nb.

Shape transition affects level density parameters.

Band crossing coincides with shape transition.

Abstract

Temperature and angular momentum induced shape changes in the well deformed 100 Nb have been investigated within the theoretical framework of Statistical theory combined with triaxially deformed Nilson potential and Strutinsky prescription. Two shape coexistence, one in the ground state of 104 Nb between oblate and triaxial shapes and another one between oblate and rarely seen prolate non-collective shapes in excited hot rotating 100 Nb at the mid spin values around 14-16h are reported for the first time. The level density parameter indicates the influence of the shell effects and changes drastically at the shape transition. The band crossing is observed at the sharp shape transition.