Theoretical study on the production of neutron-rich transuranium nuclei with radioactive beams in multinucleon transfer reactions

The production of neutron-rich transuranium nuclei with Z = 93-98 in multinucleon transfer reactions induced by radioactive beams K-92, Sn-132, and Xe-144 with actinide target U-238 is investigated within the dinuclear system model with decay code GEMINI++. The isotopic distributions for reactions Xe-136+Cm-248 and Xe-136+Cf-249 are calculated and compared with the available experimental data. Theoretical calculations can reproduce the experimental results well. Both the N/Z ratio equilibration mechanism and driving potential dominate the transfer process of nucleons. Reaction Sn-132+U-238 is an optimal projectile-target combination to obtain large production cross sections of neutron-rich isotopes with Z = 93-98. The corresponding optimal incident energy is also explored. The production cross sections of 41 unknown neutron-rich transuranium isotopes with cross sections greater than 1 nb are predicted. The reaction Sn-132+U-238 at E-c.m. = 521.3 MeV shows huge advantages in producing neutron-rich transuranium nuclei with Z = 93-98.

Automated summary

This study investigates the production of neutron-rich transuranium nuclei with Z = 93-98 in multinucleon transfer reactions induced by radioactive beams using a theoretical model and decay code. The theoretical calculations are able to reproduce the experimental results well, showing the dominance of N/Z ratio equilibration and driving mechanisms in the nucleon transfer process.