Vibrationalndash;Translational Energy Transfer in the Nearhyphen;Adiabatic Approximation

摘要

Vibrationalndash;translational energy transfer is examined in the nearhyphen;adiabatic (or perturbed stationary states) approximation. The results are classical, and the method used is related to that of Marcus J. Chem. Phys.49,2617 (1968). The results are compared with those of the more usual (ldquo;staticrdquo;) approximation and with the exact results. The PSS results were good at low energies at all mass ratios studied, unlike the static results. For certain mass ratios the static approximation fails badly, even at very low transition probabilities. For other mass ratios, the results are of comparable accuracy except at high energies where the static one is somewhat better. Reasons for the above behavior are discussed, and implications regarding existing infinitehyphen;order distorted wave and semiclassical calculations are noted. The relation to a recent correction of the Jacksonndash;Mott calculation is described.