Collisional relaxation of collective motion in a finite Fermi liquid

Abstract

Finite size effects in the equilibrium phase space density distribution function are taken into account for alculations of the relaxation of collective motion in finite nuclei. Memory effects in the collision integral and the diffusivity and the quantum oscillations of the equilibrium distribution function in momentum space are considered. It is shown that a smooth diffuse (Fermi-type) equilibrium distribution function leads to a spurious contribution to the relaxation time. The residual quantum oscillations of the equilibrium distribution function eliminates the spurious contribution. It ensures the disappearance of the gain and loss terms in the collision integral in the ground state of the system and strongly reduces the internal collisional width of the isoscalar giant quadrupole resonances.

REVTeX, 36 pages, included 13 PostScript figures

Cited by in corpus (5)

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• Diffuse relaxation approximation in a heated Fermi system
• Chaotic scattering on surfaces and collisional damping of collective modes
• Small damping approach in Fermi-liquid theory
• Properties of the diffusion and drift kinetic coefficients in momentum space for a cold Fermi system