Photofragment-ion imaging

Photofragment ion imaging (or product imaging) is an experimental technique for making measurements of the velocity of product molecules or particles following a chemical reaction or the photodissociation of a parent molecule. The method uses a two-dimensional detector, usually a microchannel plate, to record the arrival positions of state-selected ions created by resonantly enhanced multi-photon ionization (REMPI). The first experiment using photofragment ion imaging was performed by David W. Chandler and Paul L. Houston in 1987 on the phototodissociation dynamics of methyl iodide (iodomethane, CH3I).

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