Influence of pre-fission neutron emission on fission fragment angular distribution for the system <SUP>209</SUP>Bi+ <SUP>16</SUP>O

The data of fission fragment anisotropies measured for the system <SUP>16</SUP>O +<SUP>209</SUP>Bi in the centre of mass energy region of 73 to 95 MeV have been compared with the saddle point statistical model calculations. The corrections to the nuclear temperature and the spin distribution arising due to pre-fission neutron emission have been made. While the resultant calculations reproduce very well the data in the near- and sub-barrier energy regions, they deviate from the data at higher energies. This observation is similar to what was already reported for <SUP>16</SUP>O +<SUP>208</SUP>Pb system