Bound and unbound particles in Griffin model state densities

Errors in earlier derivations of the density of unbound particle-hole states in the Griffin model are corrected. New expressions for the densities of states accessible in the two-body interactions are also derived. State densities calculated with the modified equations are compared with results of exact counting. Particle emission spectra calculated within the Griffin model are essentially unchanged, but the equal a priori probability assumption, found to be violated in the earlier work, is verified to a high degree of accuracy when the revised state densities are used