Fusion-fission of Superheavy Nuclei

Abstract

The process of fusion-fission of superheavy nuclei with Z = 102-122 formed in the reactions with 22 Ne, 26 Mg, 48 Ca, 58 Fe, and 86 Kr ions at energies near and below the Coulomb barrier has been studied. The experiments were carried out at the U-400 accelerator of the Flerov Laboratory of Nuclear Reactions (JINR) using a time-of-flight spectrometer of fission fragments CORSET and a neutron multi-detector DEMON. As a result of the experiments, mass and energy distributions of fission fragments, fission and quasi-fission cross sections, multiplicities of neutrons and γ-quanta, and their dependence on the mechanism of formation and decay of compound superheavy systems have been studied.