Suppression of complete fusion due to breakup in the reactions 10,11B + 209Bi
Abstract
Above-barrier cross sections of α-active heavy reaction products, as well as fission, were measured for the reactions of 10,11B with 209Bi. Detailed analysis showed that the heavy products include components from incomplete fusion as well as complete fusion (CF), but fission originates almost exclusively from CF. Compared with fusion calculations without breakup, the CF cross sections are suppressed by 15% for 10B and 7% for 11B. A consistent and systematic variation of the suppression of CF for reactions of the weakly bound nuclei 6,7Li, 9Be, 10,11B on targets of 208Pb and 209Bi is found as a function of the breakup threshold energy.
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