SPATIAL-DISTRIBUTION AND ACCUMULATION OF RADICALS ARISING IN ORGANIC-SOLIDS UNDER THE ACTION OF GLOW-DISCHARGE

The method, based on analyzing the dipolar broadening of EPR spectra was applied for investigation of the spatial distribution of radicals generated by high-frequency glow discharge in organic molecular crystals (powders of malonic and dimethylmalonic acids) and glassy isopropanol contained electron scavenger. It was shown that in the first case the radical distribution does not depend on time of discharge. The radicals are generated in layer of size approximately 0.05-0.1 mum at a concentration of approximately 2 10(20) cm-3. For the second case the distribution function was changed in the course of plasma treatment and the depth of radical generation was varied from 0.25 to 1.5 mum during the discharge action. Contribution of the various mechanisms of radical formation were evaluated and it was shown that ionic mechanism predominated. A kinetic model is proposed to describe both the radical accumulation and evolution of spatial distribution function in plasmolysis. The use of the model, method and obtained data for general and practical applications is discussed.