Sub-barrier capture with quantum diffusion approach: Actinide-based reactions

With the quantum diffusion approach the behavior of capture cross-sections and mean-square angular momenta of captured systems are revealed in the reactions with deformed nuclei at sub-barrier energies. The calculated results are in a good agreement with existing experimental data. With decreasing bombarding energy under the barrier the external turning point of the nucleus-nucleus potential leaves the region of short-range nuclear interaction and action of friction. Because of this change of the regime of interaction, an unexpected enhancement of the capture cross-section occurs at bombarding energies far below the Coulomb barrier. There is also an effect on the dependence of the mean-square angular momentum of the captured system on the bombarding energy. From the comparison of calculated and experimental capture cross-sections, the importance of quasifission near the entrance channel is shown for the actinide-based reactions leading to superheavy nuclei