Production of neutron-rich nuclei with Z=95-100 in multinucleon transfer reactions considering the effect of deformation relaxation

Within the framework of the dinuclear system model taking into account deformation relaxation, the calculated isotopic distributions in the multinucleon transfer reactions 136Xe + 249Cf and 86Kr + 248Cm are in good agreement with the experimental data, especially the cross sections of the neutron-rich isotopes. The time-dependent driving potential decreases with evolution time in the 136Xe + 249Cf reaction, while the 154Sm + 249Bk reaction shows an opposite trend, due to the different ground-state deformations of the projectiles. The effect of the time-dependent driving potential on the cross section is investigated. The production cross sections of the final fragments are not sensitive to the incident energy. Finally, the cross sections of unknown isotopes in the reaction 238U + 249Bk are predicted, in which the high N/Z ratio of 238U leads to the production of 49 new neutron-rich isotopes in the range Z = 95-100 with cross sections larger than 1 pb.