Abstract
Various kinetic effects are discussed which arise from velocity-selective rovibrational excitation in molecular gases. Prerequisites for such effects are state-dependent collisional interactions or rapid collisional de-excitation. The emphasis is on the first type, with the state-dependent interaction being either with a foreign gas (giving rise to light-induced drift) or with a surface (giving rise to surface light-induced drift). Experiments investigating these phenomena are briefly described and their results discussed. Applications include determination of vibrational-state-dependent kinetic cross sections, isotope separation, and the study of the rotational-state-dependence of molecule-surface interactions.
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