Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-11-08
Physics
Nuclear Physics
Nuclear Theory
13 pages, 9 (eps) figures, uses revtex4, submitted to Phys.Rev. C
Scientific paper
The effects of the entrance channel and shell structure of reacting nuclei on the experimental evaporation residues have been studied by analysing the 40Ar+176Hf, 86Kr+130,136Xe, 124Sn+92Zr and 48Ca+174Yb reactions leading to the 216Th* and 222Th* compound nuclei. The measured excitation function of evaporation residues for the 124Sn+92Zr reaction was larger than that for the 86Kr+130Xe reaction. The experimental values of evaporation residues in the 86Kr+136Xe reaction were about 500 times larger than that in the 86Kr+130Xe reaction. These results are explained by the initial angular momentum dependence of the fusion excitation functions calculated in framework of the dinuclear system concept and by the differences in survival probabilities calculated in framework of advanced statistical model. The dependencies of the fission barrier and the \Gamma_n / \Gamma_f ratio on the angular momentum of the excited compound nucleus are taken into account.
Fazio Giacomo
Giardina Giorgio
Hanappe Francis
Hofmann Siegfried
Lamberto A.
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