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Physics Letters B
The transition from asymmetric to symmetric fission as dependent on the excitation energy and nucleon composition of fissioning Th and Pa nuclei is investigated for the 232 Th(n, F) and 232 Th(p, F) reactions, respectively. Observed neutron-induced fission cross sections are described in a fission/evaporation approximation. A separate relatively high outer fission barrier E SL f B with significant curvature was assumed for the symmetric mode, while the inner one (E SL(AS) f A ) was assumed todoi:10.1016/j.physletb.2007.04.038 fatcat:bpa25h6qxbbkbhkc5prnvuclly