Combinatorial nuclear level density by a Monte Carlo method

Details Combinatorial nuclear level density by a Monte Carlo method Combinatorial nuclear level density by a Monte Carlo method

1993-09-14

arxiv.org/abs/nucl-th/9309016v1

Phys.Rev.C49:852-866,1994

Physics

Nuclear Physics

Nuclear Theory

30 pages, LaTex, 7 figures (6 Postscript figures included). Fig. 6 upon request to the author

Scientific paper

10.1103/PhysRevC.49.852

We present a new combinatorial method for the calculation of the nuclear level density. It is based on a Monte Carlo technique, in order to avoid a direct counting procedure which is generally impracticable for high-A nuclei. The Monte Carlo simulation, making use of the Metropolis sampling scheme, allows a computationally fast estimate of the level density for many fermion systems in large shell model spaces. We emphasize the advantages of this Monte Carlo approach, particularly concerning the prediction of the spin and parity distributions of the excited states, and compare our results with those derived from a traditional combinatorial or a statistical method. Such a Monte Carlo technique seems very promising to determine accurate level densities in a large energy range for nuclear reaction calculations.

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