Energy dependent ratios of level-density parameters in superheavy nuclei

The nuclear level densities and level-density parameters in fissioning nuclei at their saddle points of fission barriers, ${a}_{f}$, as well those for neutron, ${a}_{n}$, proton, ${a}_{p}$, $\ensuremath{\alpha}$-particle, ${a}_{\ensuremath{\alpha}}$, emission residues the ground states are calculated isotopic chains superheavy with $Z$ = 112--120. calculations performed superfluid formalism using single-particle energies obtained from diagonalization deformed Woods-Saxon potential. Spectra were generated global minima adiabatic potential energy surfaces, found by multidimensional minimization method, proper points, ``immersion water flow'' technique on grids, allowed reflection axial symmetry breaking. influence shell effects dependence ratios corresponding to considered decay modes neutron is studied. As shown, contrast ${a}_{f}/{a}_{n}$ ratio, ${a}_{p}/{a}_{n}$ ${a}_{\ensuremath{\alpha}}/{a}_{n}$ do not show characteristic maxima depending excitation compound nucleus being formed. In case $\ensuremath{\alpha}$ decay, we identified collective enhancement caused cluster degrees freedom playing quite an important role. energetic course variability before reaching asymptotic value, taken into account so far, great importance estimation probabilities de-excitation cascades via light particles competition and, thus, determination survival finally total production cross sections nuclei.