Systematics of fusion probability in "hot" fusion reactions

Details Systematics of fusion probability in "hot" fusion reactions Systematics of fusion probability in "hot" fusion reactions

2011-12-28

arxiv.org/abs/1112.6042v1

Phys.Rev.C84:061601,2011

Physics

Nuclear Physics

Nuclear Theory

5 figures, 1 table

Scientific paper

10.1103/PhysRevC.84.061601

The fusion probability in "hot" fusion reactions leading to the synthesis of super-heavy nuclei is investigated systematically. The quasi-fission barrier influences the formation of the super-heavy nucleus around the "island of stability" in addition to the shell correction. Based on the quasi-fission barrier height obtained with the Skyrme energy-density functional, we propose an analytical expression for the description of the fusion probability, with which the measured evaporation residual cross sections can be reproduced acceptably well. Simultaneously, some special fusion reactions for synthesizing new elements 119 and 120 are studied. The predicted evaporation residual cross sections for 50Ti+249Bk are about 10-150fb at energies around the entrance-channel Coulomb barrier. For the fusion reactions synthesizing element 120 with projectiles 54Cr and 58Fe, the cross sections fall to a few femtobarns which seems beyond the limit of the available facilities.

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