Conclusions
The annihilation method has shown that there are changes in the vitreous framework in the concentration ranges 5–15 and 40–50 at. % As, which are related to transition to structures representing the compounds As2Se3 and AsSe, respectively. Our results are closely correlated with those from other methods [5-9]. The introduction of 1.0 or 2.1 at. % Sn affects the angular-correlation curves appreciably. The tin is randomly distributed in the glass and forms part of the unified framework.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 131–133, May, 1975.
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Mikhailov, V.I., Zhdanov, V.M. & Tsyganov, A.D. Positron annihilation in vitreous As-Se and As-Sn-Se systems. Soviet Physics Journal 18, 716–717 (1975). https://doi.org/10.1007/BF00894015
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DOI: https://doi.org/10.1007/BF00894015