Physics
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..748..359n&link_type=abstract
MODERN TRENDS IN PHYSICS RESEARCH: First International Conference on Modern Trends in Physics Research; MTPR-04. AIP Conference
Physics
Level Density, Nuclear Structure Models And Methods
Scientific paper
Nuclear level densities are important in nuclear physics for a number of reasons. They are required in the designing of fission and fusion reactors, they have medical as well as astrophysical applications. Of the many important consequences of level densities in astrophysics, I am mainly concerned here with the nucleosynthesis problem. Nucleosynthesis calculations require nuclear level densities for hundreds or even thousands of nuclides. Ideally one would like to constrain these level densities by microscopically motivated yet computationally cheap models. A statistical approach suggests that low moments of the Hamiltonian might be sufficient. Recently Zuker proposed a simple combinatoric formula for level densities based upon the binomial distribution. In this paper I rigorously test the binomial formula against full scale shell-model diagonalization calculations for selected sd- and fp-shell nuclides and also against Monte Carlo path integration calculations.
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