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Abstract
The results of an investigation of the photoactivation of the diffusion of Na atoms in the subsurface region of heated gold are presented. The dependences of the rate of this process on substrate temperature and the concentration of alkali-metal atoms in the adlayer and in the subsurface layer of gold are obtained. The kinetic characteristics of photostimulated diffusion are found. It is shown that this process is caused by the action of light on the alloy NaAu, which leads to an increase in the rate of the diffusive motion of Na atoms in the subsurface layer of the solid.
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