Pairing effect in thermal shape fluctuation model on the width of giant dipole resonance

TL;DR

This paper enhances the thermal shape fluctuation model by incorporating temperature-dependent shell effects and pairing fluctuations to better explain the observed quenching of the giant dipole resonance width in certain nuclei.

Contribution

It introduces a novel approach combining pairing fluctuations with TSFM to accurately model GDR width at finite temperatures.

Findings

Pairing fluctuations significantly affect GDR width.

The improved model explains recent experimental quenching observations.

More precise data are needed to validate pairing parameters.

Abstract

We present an approach that includes temperature-dependent shell effects and fluctuations of the pairing field in the thermal shape fluctuation model (TSFM). We apply this approach to study the width of giant dipole resonance (GDR) in $^{97}$Tc, $^{120}$Sn and $^{208}$Pb. Our results demonstrate that the TSFM that includes pairing fluctuations can explain the recently observed quenching in the GDR width. We also show that to validate pairing prescriptions and the parameters involved, we require more and precise data.