Level-density parameters in superheavy nuclei

We systematically study the nuclear level densities of superheavy nuclei, including odd systems, using single-particle energies obtained with Woods-Saxon potential diagonalization. applied minimization over many deformation parameters for global minima-ground states, and ``imaginary water flow'' technique on a many-deformation energy grid saddle points, nonaxial shapes. The density are calculated by fitting results standard Fermi gas expression. total shell correction dependencies level-density parameter analyzed at ground state point. These compared phenomenological approach. As shown, this expression should be modified especially small excitation energy. ratio point to that is shown crucial survival probability heavy nucleus.