TOTAL AND PARITY-PROJECTED LEVEL DENSITIES OF IRON-REGION NUCLEI IN THE AUXILIARY FIELDS MONTE-CARLO SHELL-MODEL

We use the auxiliary fields Monte Carlo method for the shell model in the complete (pf + Og(9/2)) shell to calculate level densities. We int roduce parity projection techniques which enable us to calculate the p arity dependence of the level density. Results are presented for Fe-56 , where the calculated total level density is found to be in good agre ement with the experimental level density. The parity-projected densit ies are well described by a backshifted Bethe formula, but with signif icant dependence of the single-particle level-density and backshift pa rameters on parity. We compare our exact results with those of the the rmal Hartree-Fock approximation.