Influence of the Short-Range Atomic Forces on the Molecular Term Splitting in the (A−,A) System. Application toO−-O Resonant Charge Transfer

A general asymptotic expression for the energy separation $\Delta \mathrm{}\left(R\right)\mathrm{}$ of the symmetrical and antisymmetrical states in the ($A^{-},A$) system is derived. A great influence of the atomic short-range forces on $\Delta \mathrm{}\left(R\right)\mathrm{}$ has been found. At large values of the atomic effective range $r_0$, the present expression for $\Delta \mathrm{}\left(R\right)\mathrm{}$ leads to the previous result of the authors, and for small $r_0$, a Smirnov-like behavior of the molecular term splitting is obtained. As an application of the result obtained for $\Delta \mathrm{}\left(R\right)\mathrm{}$, the resonant charge transfer in ${\mathrm{O}}^{-}$-O collisions is calculated and a comparison with the experimental data is made.