Fission fragment folding angle distributions for the systems B-11+Np-237, C-12+U-236, and O-16+Th-232 in the energy range 1.1%LT;E/VB < 2.1

Fission fragment folding angle distributions have been measured for the sys tems B-11+Np-237, C-12+U-236, and O-16+Th-232, populating the same compound nucleus (Cf-248) and at similar excitation energies (E-x 45-100 MeV). The full momentum transfer and incomplete momentum transfer fusion-fission comp onents have been separated over the bombarding energy range 1.1<E-c.m./V-B< 2.1. It is observed thar the largest value of the ratio of the transfer fis sion to the total fission is around 10 to 15 % at the highest energy invest igated. Over the energy range mentioned above, it is found that the transfe r fission corrected fission fragment anisotropies are not significantly dif ferent from the values already obtained from the analysis of the total fiss ion data reported earlier and hence the conclusions reached from the inclus ive data remain unchanged. The anisotropy data were analyzed for the two ca ses corresponding to fission events with sizable fission barriers (B-f>T) a nd with smaller fission barriers (B-f<T) It was interesting to find that th e effective moment of inertia (J(eff)) values deduced from the latter compo nent were consistent with the values from Sierk prescription used in the fo rmer case. [S0556-2813(99)03105-2].