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After a brief review of the history of viscosity from classical to quantal fluids, a discussion of how the shear viscosity η of a finite hot nucleus is calculated directly from the width and energy of the giant dipole resonance (GDR) of the nucleus is given in this paper. The ratio η/s with s being the entropy volume density, is extracted from the experimental systematic of GDR in copper, tin and...
The quasiparticle representation of the phonon darnping model (PDM) is developed to include the superfluid pairing correlations microscopically. The formalism is applied to calculate the photoabsorption and the electromagnetic (EM) differential cross sections of E1 excitations in neutron-rich oxygen and calcium isotopes. The calculated photoabsorption cross sections agree reasonably well with the...
A systematic description of the evolution of the giant dipole resonance (GDR) at non-zero temperature T is given within the framework of two versions PDM-1 and PDM-2 of the Phonon Damping Model (PDM). The PDM interprets the damping of the GDR as a result of coupling to all ph, pp and hh configurations at T <> 0, where the coupling to pp and hh configurations is decisively important for an adequate...
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