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Positron trapping in chalcogenide glasses: a comparison between arsenic sulphide and selenide.

Shpotyuk O. I., Filipecki J., Kozdras A., Popescu M., Hyla M.

Archives of Materials Science

2006

Vol. 27, nr 4

167-175

Positron annihilation lifetime measurements are performed for stoichiometric arsenic suphide. It is shown that two-state positron trapping model is valid for this glass as it has been shown previously for stoichiometric arsenic selenide. Two-component fitting parameters of LT computer program, describing positron annihilation in glassy As2S3, are close to those of glassy As2Se3. They are in good agreement with theoretically calculated distribution of nanovoid radii in these materials.