Correlation of Intermediate Energy Proton- and Neutron-Induced Fission Cross Sections in the Lead-Bismuth Region

摘要

Neutron- and proton-induced fission cross-sections of the lead isotopes 204,206–208Pb and 205Tl in the intermediate energy region have been measured at the Svedberg Laboratory in Uppsala, Sweden. Average fissilities of the composite nuclei and the dependence on the nucleon energy and the parameter Z2/A were determined. On this basis, the correlation between the proton- and neutron-induced fission cross sections has been established in the atomic mass region A ~ 200 and for nucleon energies above 50 MeV, where shell effects do not play a very significant role. The correlation is discussed in the frame of results from calculations by the code TALYS.