Effects of the shell structure in reactions leading to the same compound nucleus or different isotopes
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 (DNS) and advanced statistical model (ASM). The revealed differences between experimental data on the evaporation residues in the 40Ar+176Hf, 86Kr + 130Xe and 124Sn + 92Zr reactions leading to the 216Th* compound nucleus (CN) as well as that between the 48Ca + 174Yb and 86Kr + 136Xe reactions leading to the 222Th* CN 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.
- Publication:
-
Nuclear Physics at Border Lines
- Pub Date:
- January 2002
- DOI:
- 10.1142/9789812778321_0038
- arXiv:
- arXiv:nucl-th/0111034
- Bibcode:
- 2002npbl.conf..234N
- Keywords:
-
- Nuclear Theory;
- Nuclear Experiment
- E-Print:
- 14 pages, 5 EPS figures, Latex, ws-p8-50x6-00.cls is used, Talk given at the Conference NPBL2001, Lipari (Messina, Italy), 21-24 May, 2001