Possible influence of neutron shell closure (N c =126) on fission anisotropies for 19 F+ 194,198 Pt systems

Fission fragment angular distributions have been measured for 19 F+ 194,198 Pt systems in the laboratory energy range from 88 to 104 MeV and the fission fragment angular anisotropy data have been compared with the statistical saddle-point model calculations. The anisotropy data for 19 F+ 198 Pt( 217 Fr with compound nucleus neutron number N c =130) are in good accord with the calculations over the entire range of bombarding energies except at the highest energy point. However, the data for 19 F+ 194 Pt( 213 Fr with N c =126) though consistent on the average with the calculations, show noticeable deviation at a few energies.