Collisional damping in heated nuclei within the Landau-Vlasov kinetic theory.
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Collisional damping of nuclear collective vibrations is studied within the framework of the Vlasov-Landau equation including retardation (memory) effects in the collision integral. Expressions for the nuclear two-body viscosity and the collisional width of the giant multipole resonances in heated nuclei are obtained in the case of the quadrupole dynamic distortion of the Fermi surface. An improved formula for is also proposed in which all multipolarities of the distortion of the Fermi sphere are taken into account. The collisional width of the giant dipole resonance is calculated as a function of excitation energy for the Sn nuclei region using this formula. It shows a weak variation with temperature. In the temperature range of T2.57 MeV, the contribution of collisional damping to GDR width does not exceed 50% of the experimental values. 1995 The American Physical Society.
author list (cited authors)
Kolomietz, V. M., Plujko, V. A., & Shlomo, S.
complete list of authors
Kolomietz, VM||Plujko, VA||Shlomo, S