https://doi.org/10.1140/epja/i2011-11038-y
Regular Article - Theoretical Physics
Sub-barrier capture with quantum diffusion approach: Actinide-based reactions
1
Joint Institute for Nuclear Research, 141980, Dubna, Russia
2
Institute of Nuclear Physics, 702132, Tashkent, Uzbekistan
3
Institut für Theoretische Physik der Justus-Liebig-Universität, D-35392, Giessen, Germany
4
China Institute of Atomic Energy, PO Box 275, 102413, Beijing, China
* e-mail: adamian@theor.jinr.ru
Received:
11
November
2010
Accepted:
11
February
2011
Published online:
15
March
2011
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.
© SIF, Springer-Verlag Berlin Heidelberg, 2011
