Abstract
Abstract The semi-empirical shell-dependent nuclear-level-density formula proposed earlier has been extended in the present work to include explicitly the deformation dependence degree of freedom. The modified formula reproduces well the decrease in the most probable deformation parameter with increasing excitation energy in agreement with the results of microscopic shell-model calculations. At around 8 MeV excitation energy, this formula predicts enhanced nuclear level densities for deformed nuclei by a factor 1.5–3 over values calculated without including the deformation degree of freedom and are in agreement with the observed data.
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