RECOIL OPACITY FUNCTION AND ANGULAR-MOMENTUM TRANSFER ACROSS A DEEP-WELL FOR HEAVY HEAVY-LIGHT CHEMICAL-REACTIONS

The shape of the exit impact parameter function, P(b'), for the Mg+FH reacting system - taken as a prototype for alkaline earth+hydrogen halide reactions - is found to be a quite sensitive indicator of the reaction pathway. In particular we have found that there exists a mass-(isotopic) and energy-independent cut-off b'* value of the product impact parameter b' definitely separating the direct and complex contributions to P(b'). The value of b'* was found to be associated with the equilibrium internuclear distance of H-Mg in the HMgF intermediate complex.