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

Creators: Dean, D. J.; Koonin, S. E.

Abstract

We develop a shell-model Monte Carlo method to calculate densities of states with varying exciton (particle-hole) number. We then apply this method to the doubly closed-shell nucleus 40Ca in a full 0s-1d-0f-1p shell-model space and compare our results to those found using approximate analytic expressions for the partial densities. We find that the effective one-body level density is reduced by approximately 22% when a residual two-body interaction is included in the shell-model calculation.

Additional Information

©1999 The American Physical Society. Received 27 May 1999; published 27 September 1999. This work was supported in part through Grant No. DEFG02-96ER40963 from the U.S. Department of Energy (DOE). Oak Ridge National Laboratory (ORNL) is managed by Lockheed Martin Energy Research Corp. for the U.S. Department of Energy under Contract No. DE-AC05-96OR22464. We also acknowledge support from the U.S. National Science Foundation under Grant Nos. PHY-9722428, PHY94-12818, and PHY94-20470. Computational resources were provided by the U.S. DOE National Energy Research Scientific Computing Center.

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