Production of exotic nuclei in quasifission-type reactions

Abstract

The possibilities for producing neutron-rich isotopes 82,84,86Zn and 86,88,90,92Ge are demonstrated in the reactions 48Ca+238U, 244Pu at incident energies near the Coulomb barrier. The production cross sections of new neutron-rich isotopes of nuclei with charge numbers Z=64–80 are estimated as well. The dynamics of the binary reaction is considered as the diffusive multinucleon transfer between the interacting nuclei in the collisions when the excitation energy of the produced exotic isotope is lower than the threshold for the neutron emission. In the quasifission reactions 48Ca+244,246,248Cm at beam energies close to the corresponding Coulomb barriers one can produce new isotopes of superheavies with Z = 103–108, which mainly undergo fission.