Light charged particles in coincidence with evaporation residues and heavy fragments have been measured for the 200MeV S-32 + Mo-100 reaction leading to the Ce-132 composite. The alpha pre-scission multiplicities are remarkably larger than what found in the same system at 240 MeV. This unexpected trend can be ascribed to the opening of the fast fission channel at 240 MeV. The statistical model reproduces the light charged particles pre-scission multiplicities at 200 MeV if a delay time of tau(d) approximate to 26 x 10(-21)s is considered.
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