The adsorbate- and the substrate-mediated chemical processes induced by ultraviolet (UV) laser pulses have been identified for the CH2I2/Ag system. In contrast to CH2I2 on Al2O3, little photodissociation or desorption is observed for the molecules adsorbed on an Ag surface at submonolayer coverages. Photochemical effect is evident at coverages higher than a monolayer. Explosive desorption dominates at high surface coverages and high laser fluences. The explosive behavior is elucidated and its implications relevant to material ablation by lasers is discussed.
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Domen et al. (1989) studied this question.
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