Transition Probability for Fixed Coordinates of the Ions and Reactants

Let us consider the transition probability for a fixed distance between the reactants (or, for an electrochemical reaction, with a fixed distance between the ion and the electrode) and at fixed values of the ionic coordinates, 

Assuming that the acoustic modes are separated from the optical ones, we can transform the formula for the transition probability, Wif r, A/), to the form similar to Eqs. (19)-(21), viz., 

The probability, fV,/( r, , A/), depends on. In general, this dependence should be taken into account along with that of A/ on for 

Since the repulsion of the electronic envelopes of the reactant from the nearest molecules of the medium is very sharp, it may be expected that the potential, (or t//( f )) describing the change of the cavity size is 

The quantities Ui ) and Uf ) may apparently be estimated as the work required to create a cavity of a given size. 

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