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

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.

18 page, 4 figures, accepted for publication in Phys. Rev. C

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• A fully microscopic model of total level density in spherical nuclei
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• Possible existence of pygmy dipole resonance built on excited states in a neutron-rich ${}^{80}$Ge nucleus
• Giant dipole resonance in highly excited nuclei
• Thermal pairing and giant dipole resonance in highly excited nuclei