The reaction systems ${}^{48}\mathrm{Ca}+{}^{238}\mathrm{U}$ and ${}^{48}\mathrm{Ca}+{}^{248}\mathrm{Cm}$ are investigated within the improved dinuclear system model+GEMINI++. The theoretical results show that the distributions of isotopes in the ${}^{48}\mathrm{Ca}+{}^{238}\mathrm{U}$ reaction are well described with the model. For the ${}^{48}\mathrm{Ca}+{}^{248}\mathrm{Cm}$ reaction, the model partly describes well the experimental production cross sections. Experimental and theoretical data from multinucleon transfer reactions indicate that the isotopic distributions of the ${}^{48}\mathrm{Ca}+{}^{238}\mathrm{U}$ reaction system above Pb are shifted toward the neutron-rich side as compared to the ${}^{136}\mathrm{Xe}+{}^{208}\mathrm{Pb}$ reaction except the isotopic distribution of Bi.

• Received 20 October 2020
• Accepted 8 February 2021

DOI:https://doi.org/10.1103/PhysRevC.103.024613