Effects of shell structure in reactions leading to the same compound nucleus or different isotopes

Nasirov, A.K. (Dubna, JINR) ; Fazio, G. (Messina U.) ; Giardina, G. (Messina U.) ; Lamberto, A. (Messina U.) ; Ruggeri, R. (Messina U.) ; Taccone, A. (Messina U.) ; Muminov, A.I. (Tashkent, IYF) ; Hanappe, F. (Brussels U.) ; Palamara, R. (Calabria U.) ; Stuttge, L. (Strasbourg, IReS)

Page No: 234-243
Pages: 14

Abstract: 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.


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 Запись создана 2010-10-28, последняя модификация 2013-11-12

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