Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-11-12
Physics
Nuclear Physics
Nuclear Theory
14 pages, 5 EPS figures, Latex, ws-p8-50x6-00.cls is used, Talk given at the Conference NPBL2001, Lipari (Messina, Italy), 21-
Scientific paper
The role of the entrance channel in fusion-fission reactions was studied by the theoretical analysis of the experimental evaporation residue excitation functions for reactions leading to the same compound nucleus. The evaporation residues cross sections for xn-channels were calculated in the frame of the combined dinuclear system concept and advanced statistical model. The revealed differences between experimental data on the evaporation residues in the ^{40}Ar+^{176}Hf, ^{86}Kr + ^{130}Xe and ^{124}Sn + ^{92}Zr reactions leading to the ^{216}Th^* compound nucleus are explained by the different spin distributions of compound nuclei which are formed. It is shown that the intrinsic fusion barrier B^*_{fus} and size of potential well are different for every entrance channel.
Fazio Giacomo
Giardina Giorgio
Hanappe Francis
Lamberto A.
Muminov Akhtam I.
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