The damping width of giant dipole resonances of cold and hot nuclei: a macroscopic model

Abstract

A phenomenological macroscopic model of the Giant Dipole Resonance (GDR) damping width of cold- and hot-nuclei with ground-state spherical and near-spherical shapes is developed. The model is based on a generalized Fermi Liquid model which takes into account the nuclear surface dynamics. The temperature dependence of the GDR damping width is accounted for in terms of surface- and volume-components. Parameter-free expressions for the damping width and the effective deformation are obtained. The model is validated with GDR measurements of the following nuclides, ${}^{39,40}$K, ${}^{42}$Ca, ${}^{45}$Sc, ${}^{59,63}$Cu, ${}^{109-120}$Sn,${}^{147}$Eu, ${}^{194}$Hg, and ${}^{208}$Pb, and is compared with the predictions of other models.

arXiv comment10 pages, 5 figures

References in corpus (6)

• Microscopic Calculation of in-Medium Proton-Proton Cross Sections
• Scaling Properties of the Giant Dipole Resonance Width in Hot Rotating nuclei
• Critical Enhancement of the In-medium Nucleon-Nucleon Cross Section at low Temperatures
• Isovector Vibrations in Nuclear Matter at Finite Temperature
• On the Collisional Damping of Giant Dipole Resonance
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Cited by in corpus (2)

• Giant-dipole Resonance and the Deformation of Hot, Rotating Nuclei
• Description of nuclear photoexcitation by Lorentzian expressions for electric dipole photon strength function