Fermion-field theory and configuration averaging. II. Two-particle Green functions

For pt.I see abstr. A50504 of 1975. The fermion-field approach to the configuration averaging problem is here applied to the two-particle Green function. The aim is to understand the multiple-scattering processes taking place, with the ultimate aim of investigating how the inclusion of cluster effects self-consistently in diffusion probabilities enhance and eventually cause localization.