Calculation of exciton densities in the shell-model Monte Carlo method

We develop a shell-model Monte Carlo method to calculate densities of states with varying exciton ~par iclehole! number. We then apply this method to the doubly closed-shell nucleus Ca in a full 0s-1d-0 f -1p shell-model space and compare our results to those found using approximate analytic expressions for the partial densities. We find that the effective… (More)