Reactive scattering between two molecules

We will now show that the expressions for non-reactive scattering may also, with a few changes, be applied to reactive scattering. Let us consider the reactive scattering event 

We note that ft for the inelastic non-reactive scattering event differs from ft for the reactive scattering event even with (Ec+Ed) — (E + Eg) = (Ea — E ) + (Eb — Eg) 

even in reactive scattering it makes sense to work with the / parameter as defined in Eq. (C.2), although it is no longer related to whether the scattering event is elastic or inelastic. It may always be determined from the simulation of the scattering event as shown in Eq. (C.49). 

Let us then go through the derivations leading to the results for non-reactive scattering events and detect where changes are necessary to get a result for a reactive scattering event. We begin by extending the definition of the center-of-mass velocity in Eq. (C.l) with the expression 

We then have to decide how to report the results of the scattering event. Let us choose to follow product C, so the angle will be the angle between v)( and vc, with x still being the angle between v° and v. Then we replace Eq. (C.3) by 

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