Giant dipole resonance in $^{201}$Tl at low temperature

TL;DR

This paper investigates the impact of thermal pairing on the giant dipole resonance in $^{201}$Tl at low temperatures, showing that including thermal pairing effects improves the agreement with experimental data.

Contribution

The study introduces a method to incorporate exact thermal pairing solutions into GDR calculations, enhancing the accuracy over previous approaches that neglect thermal pairing effects.

Findings

GDR width and strength function are well described with thermal pairing effects.

Thermal pairing significantly influences GDR properties at low temperatures.

Results outperform models ignoring thermal pairing effects.

Abstract

The thermal pairing gap obtained by embedding the exact solutions of the pairing problem into the canonical ensemble is employed to calculate the width and strength function of the giant dipole resonance (GDR) within the phonon damping model. The results of calculations describe reasonably well the data for the GDR width as well as the GDR linearized strength function, recently obtained for $^{201}$Tl in the temperature region between 0.8 and 1.2 MeV, which other approaches that neglect the effect of non-vanishing thermal pairing fail to describe.