Pairing Reentrance Phenomenon in Heated Rotating Nuclei in the Shell Model Monte Carlo Approach

TL;DR

This paper investigates how pairing correlations in heated rotating nuclei, specifically 72-Ge, exhibit reentrance behavior at high rotational frequencies, revealing novel thermal and rotational effects on nuclear pairing.

Contribution

It demonstrates the reentrance of pairing correlations with temperature in heated rotating nuclei using the Shell Model Monte Carlo approach, a novel insight into nuclear pairing phenomena.

Findings

Pairing correlations reenter at high rotational frequencies.

Anomalous behavior observed in specific heat and level density.

Reentrance phenomenon predicted at elevated temperatures.

Abstract

Rotational motion of heated 72-Ge is studied within the microscopic Shell Model Monte Carlo approach. We investigate the the angular momentum alignment and nuclear pairing correlations associated with J-pi Cooper pairs as a function of the rotational frequency and temperature. The reentrance of pairing correlations with temperature is predicted at high rotational frequencies. It manifests itself through the anomalous behavior of specific heat and level density.