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 hal ide reactions - is found to be a quite sensitive indicator of the reac tion pathway. In particular we have found that there exists a mass-(is otopic) and energy-independent cut-off b' value of the product impact parameter b' definitely separating the direct and complex contributio ns to P(b'). The value of b' was found to be associated with the equi librium internuclear distance of H-Mg in the HMgF intermediate complex .