Abstract

The dissociative charge transfer reactions between He + and CO 2 at high translational energies (0.1–5 keV) have been modelled by a simple two-state treatment. The total electron transfer cross-section is in quantitative agreement with experiment. Curve crossings at 1.7–3.05 Å lead to He and CO + 2 in highly excited electronic states. These products of charge transfer, if formed on the incoming channel, may then undergo an excitation or de-excitation crossing at 1.4–2.0 Å during the evolution of a single-collision event, to form the observed products of reaction. Stueckelberg-Demkov non-crossing behaviour does not appear to be important in this reaction system.

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