Quantal diffusion mechanism of nucleon exchange is studied in the central collisions of ${}^{238}\mathrm{U}+{}^{238}\mathrm{U}$ in the framework of the stochastic mean-field (SMF) approach. For bombarding energies considered in this work, the dinuclear structure is maintained during the collision. Hence, it is possible to describe nucleon exchange as a diffusion process for mass and charge asymmetry. Quantal neutron and proton diffusion coefficients, including memory effects, are extracted from the SMF approach and the primary fragment distributions are calculated.

• Received 12 June 2017

DOI:https://doi.org/10.1103/PhysRevC.96.024611