Dispersive viscosity coefficient of nuclear matter

By application of Landau's kinetic theory of a Fermi liquid in non-equilibrium a dispersive, momentum and frequency dependent shear viscosity coefficient eta(q,ω) has been deduced for symmetric nuclear matter. The resulting formula for eta is found to be complicated for arbitrary q,ω; however, simple interpretation is possible in the limit of small momentum q→0. In the static limit, ω→0, eta reduces to the well known kinetic formula for the hydrodynamic viscosity coefficient eta0, while in the high frequency (zero sound) limit, ωtau>>1, eta(ω) is found proportional to (-iω)-1 indicating elastic behaviour of nuclear matter. As is discussed shortly, application of these results to finite nuclei unfortunately does not seem justified. (Auth.)