SPECTROSCOPIC PROBING OF POTENTIAL SURFACES IN REACTIVE COLLISIONS

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Abstract
For the investigation of unstable intermediates, ABC*, which constitute the "transition states" in some simple reactive collisions, spectroscopic methods are beginning to provide valuable results. In a (relatively) simple approach molecules are photodissociated, and the interaction potentials during the process of separation (half-collision) are mapped in either absorption or emission ; the method will be described exemplary for the photolysis of NaI, giving rise to emission from NaI≠*. For reactive collisions, where a manyfold of potentials may be encountered, some promising progres shas been achieved recently. The current status of some theoretical and experimental efforts will be discussed for a number of exchange reactions, e.g., H+H2, Mg+HS2, Hg+Cl2, K+NaCl

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