Abstract
We propose a new method for investigating processes at the solid-gas interface, which is based on the interaction of the solid surface with a bunch of active species carried by a gas. Using this method, the radical recombination luminescence (RRL) kinetics in crystalline phosphors (CaO-Mn, ZnS-Tm, and ZnS-Cu) excited by a bunch of hydrogen atoms was studied during a time interval of 0.1 s at a temporal resolution of 10 ms. From these RRL measurements, data on the stages of the heterogeneous reaction H+H→H2 were obtained. It was found that the RRL intensity of a ZnS-Cu phosphor decreases with increasing surface electron excitation level. The phenomenon of the total light yield accumulation in ZnS-Cu was observed, which is explained by ionization of the surface electron states.
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