Pairing effect on the giant dipole resonance width at low temperature

Abstract

The width of the giant dipole resonance (GDR) at finite temperature T in Sn-120 is calculated within the Phonon Damping Model including the neutron thermal pairing gap determined from the modified BCS theory. It is shown that the effect of thermal pairing causes a smaller GDR width at T below 2 MeV as compared to the one obtained neglecting pairing. This improves significantly the agreement between theory and experiment including the most recent data point at T = 1 MeV.

8 pages, 5 figures to be published in Physical Review C

References in corpus (5)

• Exact solution of the nuclear pairing problem
• Scaling Properties of the Giant Dipole Resonance Width in Hot Rotating nuclei
• Particle-Number Reprojection in the Shell Model Monte Carlo Method: Application to Nuclear Level Densities
• Behavior of the giant-dipole resonance in ${}^{120}$Sn and ${}^{208}$Pb at high excitation energ
• Modified Hartree-Fock-Bogoliubov at finite temperature

Cited by in corpus (14)

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• Shear viscosity of nucleonic matter
• Anti-bubble effect of temperature \& deformation: a systematic study for nuclei across all mass regions between A $=$ 20$-$300
• Giant dipole resonance in ${}^{201}$Tl at low temperature
• Effects of thermal shape fluctuations and pairing fluctuations on the giant dipole resonance in warm nuclei
• Damping of giant dipole resonance in hot rotating nuclei
• Pairing effect in thermal shape fluctuation model on the width of giant dipole resonance
• Giant dipole resonance in ${}^{88}$Mo from phonon damping model's strength functions averaged over temperature and angular momentum distributions
• Test of modified BCS model at finite temperature
• Applicability of shape parameterizations for giant dipole resonance in warm and rapidly rotating nuclei
• On the importance of using exact pairing in the study of pygmy dipole resonance
• Thermal pairing and giant dipole resonance in highly excited nuclei