Features of the Formation of Spins of Fission Fragments in Complete Fusion Reactions of Deformed Nuclei

Within the framework of a dynamical model, an analysis of the energy dependences of the mean spins of fission fragments formed in complete fusion reactions of deformed nuclei has been carried out. The parameters of the dynamical model are determined from the conditions of the best description of experimental data on the mean spins of fission fragments for the reactions \({}^{12}\)C\(+\) \({}^{232}\)Th, \({}^{16}\)O\(+\) \({}^{209}\)Bi, \({}^{12}\)C\(+\) \({}^{209}\)Bi, and \({}^{16}\)O\(+\) \({}^{232}\)Th. The influence of the reaction entrance channel on the formation of fission fragment spins of the compound nucleus is discussed. The effect of the entrance channel is considered using the example of the \({}^{12}\)C\(+\) \({}^{236}\)U and \({}^{13}\)C \(+\) \({}^{235}\)U reactions, leading to the formation of the same compound nucleus \({}^{248}\)Cf. It is shown that, at sub-barrier collision energies, noticeable differences in the behaviour of the mean spins of fission fragments for different entrance channels of the fusion reaction should be observed.