Phase-space theory strong coupling

We may now consider the reactions which have been treated in terms of phase-space theory, as listed in Table IX. One further assumption has to be made in addition to that of strong coupling discussed above, and... 

Above all, there is need for discussion of, and hopefully agreement on, an operational test for strong-coupling collisions. We have argued here that symmetry in the angular distribution is necessary. Nikitin specifies the need for energy equilibration, and others believe phase-space theory can be applied to charge-transfer reactions where an electron is transferr between the reactants without any momentum transfer. ... 

Internal excitation of the products of these reactions is limited by the small amount of energy which is available for redistribution, and, so far, no details of the energy partitioning have been reported. As Miller, Safron, and Herschbach point out, it should be possible to apply unimolecular theories [76] or statistical theories such as that invoking phase space, which has been developed by Light and his co-workers [77] and requires strong coupling in the reactive collisions. 

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