An eikonal treatment of nonadiabatic reactions, in which nuclear positions and momenta are selfhyphen;consistently coupled to electronic transition amplitudes in a Hamiltonian formalism, is applied to H++H2collisions where both electron transfer and nuclear rearrangement may occur. The approach is based on the diabatic electronic representation and uses potential energy surfaces and momentum couplings obtained within the method of diatomicshyphen;inhyphen;molecules. Equations of motion are obtained for hyperspherical coordinates in a model collinear treatment. Calculations carried out at collision energies 1 eV above then=4 threshold of H2illustrate reactive and nonreactive processes, electron transfer, and translationalhyphen;vibrational energy transfer. Results for total electron transfer probabilities are compared with other calculations within the same model.
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