Pairing reentrance in hot rotating nuclei

TL;DR

This paper investigates how pairing gaps, heat capacities, and level densities behave in hot rotating nuclei, revealing that heat capacity effectively signals pairing reentrance, with implications for nuclear structure studies.

Contribution

It introduces a BCS-based quasiparticle approach including thermal fluctuations to analyze pairing reentrance in hot rotating nuclei.

Findings

Heat capacity is a good observable for pairing reentrance detection.

Level density shows weak signatures of pairing reentrance.

Pairing gaps decrease with temperature and rotation.

Abstract

The pairing gaps, heat capacities and level densities are calculated within the BCS-based quasiparticle approach including the effect of thermal fluctuations on the pairing field within the pairing model plus noncollective rotation along the z axis for $^{60}$Ni and $^{72}$Ge nuclei. The analysis of the numerical results obtained shows that, in addition to the pairing gap, the heat capacity can also serve as a good observable to detect the appearance of the pairing reentrance in hot rotating nuclei, whereas such signature in the level density is rather weak.