Compound nuclei in heavy ion reactions

Numerous experimental data on different compound nucleus de-excitation channels are analyzed in the framework of a unified approach. Reaction channels analyzed are the fission of excited preactinide compound nuclei and formation of cold evaporation residues, as a result of the evaporation of nucleons and clusters from compound nuclei. Formation cross sections of heavy and superheavy nuclei in fusion reactions are investigated from the point of view of the statistical model of the compound nucleus de-excitation. Cross sections of fission reactions and evaporation residue formation as well as fission fragment angular distributions and energy spectra of evaporated nucleons and clusters are calculated. Presented results show that calculations made on the basis of statistical model consistently taking into account shell effects in de-excitation product nuclei treat well enough structural features of individual compound nuclei and allows one to distinguish and analyze their various decay characteristics. Being combined with dynamical approaches to initial reaction stages, the statistical model will make a good basis for the description of heavy-ion fusion reactions occurring at projectile energies of up to 10 to 15 MeV/nucleon