Scission point model applied to 181Re∗ formed in 12C+169Tm reaction

An scission point model improved by including angular momentum effects is used to study the recently reported heavy-ion-induced fission of 181 Re ∗ formed in the 12 C+ 169 Tm reaction at three different lab energies, especially to estimate the fragment cross section. The fission is characterized as a two-stage process. Through energy balance criteria the scission point for each fragmentation is identified in the first stage. The respective formation probability is calculated using deformed Nilsson single-particle levels. The WKB approximation is used to determine the probability of fragments to penetrate the potential barrier in the second stage. Using partial wave analysis, the cross section is calculated. The yield values exhibit a clear demarcation of the asymmetric and symmetric regions. The cross section values are found to have a strong dependence on the scission distance. With the proper choice of scission distance, the model could account for the observed cross section properties of 181 Re ∗ . The calculated cross section values are found to agree with experimental data, at least in the symmetric division. In addition to mass distribution and cross section calculations, the model can be exploited to study other fission observables too.