Production of neutron-enriched isotopes along magic number N = 126 by multinucleon transfer reactions with radioactive-ion beams

Background: Multinucleon transfer (MNT) processes in low -energy deep inelastic (damped) collisions of heavy ions can be employed to produce heavy neutron -enriched nuclei. Recent progress in development of radioactiveion beam (RIB) facilities may give additional possibilities in producing nuclei with large neutron excess. Purpose: A major aim of the work is to calculate the cross sections of heavy neutron -rich isotopes with the magic number N = 126 in the reactions 132 Sn + 198 Pt and 136 , 138 , 140 Xe + 198 Pt within a multidimensional dynamical model based on the Langevin equations. Another purpose of the paper is to study the relative production rates of such nuclei reachable at currently working RIB facilities. Method: A multidimensional dynamical model of nucleus -nucleus collisions based on the Langevin equations [A. V. Karpov and V. V. Saiko, Phys. Rev. C 96 , 024618 (2017)] has been used in the present work. This model provides a reasonable description of available experimental data. Results: Cross sections of heavy neutron -enriched nuclides obtained in the MNT reactions 132 Sn + 198 Pt and 136 , 138 , 140 Xe + 198 Pt have been calculated. Relative production rates of these nuclei were estimated using beam intensities available at currently working RIB facilities. Conclusions: Using neutron -rich radioactive projectiles in multinucleon transfer reactions with the 198 Pt target, one can reach an order of magnitude higher cross sections of neutron -enriched nuclides with the magic number N = 126. Relative production yields of such nuclei increase with the increasing N / Z ratio of the projectile.