MOMENTUM DISTRIBUTION IN NUCLEAR-MATTER AND FINITE NUCLEI

A simple method is presented to evaluate the effects of short-range co rrelations on the momentum distribution of nucleons in nuclear matter within the framework of the Green's function approach. The method prov ides a very efficient representation of the single-particle Green's fu nction for a correlated system. The reliability of this method is esta blished by comparing its results to those obtained in more elaborate c alculations. The sensitivity of the momentum distribution on the nucle on-nucleon interaction and the nuclear density is studied. The momentu m distributions of nucleons in finite nuclei are derived from those in nuclear matter using a local-density approximation. These results are compared to those obtained directly for light nuclei like O-16.