Abstract
We expand the nonmarkovian collision integral in terms of multipolarities of the distortion of the Fermi surface. It is shown that damping of zero-sound is determined by all multipolarities of the Fermi-surface deformation. For large zero-sound velocity with respect to the Fermi velocity the relaxation time is related to the quadrupole deformation of the Fermi surface. The contributions of collisions to the total widths of the giant multipole resonances are calculated in a semiclassical macroscopic nuclear model.
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Kolomietz, V.M., Magner, A.G. & Plujko, V.A. Retardation effects in damping of nuclear collective excitations. Z. Physik A - Hadrons and Nuclei 345, 131–136 (1993). https://doi.org/10.1007/BF01293335
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DOI: https://doi.org/10.1007/BF01293335