Abstract
The photolysis of halomethanes adsorbed on a transparent substrate by UV excimer lasers has been studied using mass spectrometry of desorbed species. The cubic dependence of photodissociation yield versus laser fluence was discovered. The three-photon dissociation (3PD) mechanism based on molecule transfer to a repulsive electronic state by means of two-photon absorption followed by laser-stimulated photon emission has been proposed. The role of molecular energy relaxation in resonance-enhancement of these processes is discussed.
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