Abstract
The giant dipole resonance's (GDR) width and shape at finite temperature and angular momentum are described within the phonon damping model (PDM), which predicts an overall increase in the GDR's total width at low and moderate temperature T, and its saturation at high T. At T< 1 MeV the GDR width remains nearly constant because of thermal pairing. The PDM description is compared with the experimental systematics obtained from heavy-ion fusion, inelastic scattering of light particles on heavy targets, and alpha induced fusion reactions, as well as with predictions by other theoretical approaches. The results obtained within the PDM and GDR's experimental data are also employed to predict the viscosity of hot medium and heavy nuclei.
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