Abstract
Nuclear level densities of some heavy nuclei have been calculated taking into consideration the effect of one-body interaction. We use the Hamiltonian moments method based upon the statistical calculation using the Nilsson Hamiltonian for the single particle energies. The density is then constructed in terms of the moments of the Hamiltonian which are defined using spectral distribution methods. The results indicated that the Gaussian function is appropriate to describe the nuclear level density. The present calculated results have been compared with the standard Bethe formula and good agreement was obtained. Bethe parameter has been determined during the fit.