A phenomenon of the surface deposition of metallic Ag in the As-S-Ag glasses, exposed to a mercury lamp (500 W), has been found. The photographic images for As15S40Ag45 glass, which consist of a great number of Ag deposits, are shown herein. It is suggested that the fundamental process in this phenomenon is associated with both photoeffects and thermal effects.
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Maruno et al. (1975) studied this question.
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