The photodissociation of jet-cooled -benzene at 193 nm was studied. Photofragment translational energy distributions were measured by multimass ion imaging techniques. In addition to the major channel of D atom elimination from one-photon excitation, elimination of two D atoms and two ring opening dissociation channels, and resulting from two-photon dissociation was observed. These ring opening channels were confirmed by the momentum match between the two fragments in each channel.
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