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, 39,40K, 42Ca, 45Sc, 59,63Cu, 109-120Sn,147Eu, 194Hg, and 208Pb, and is compared with the predictions of other models.
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