Post-irradiation relaxation in vitreous arsenic/antimony trisulphides

V. Balitska, Ya. Shpotyuk, J. Filipecki, O. Shpotyuk, M. Iovu.

Journal of Non-Crystalline Solids, vol. 357, 2011, p. 487–489.

Abstract

Instability caused by high-energy γ-irradiation was studied in (As2S3)1−x(Sb2S3)x glasses (x=0, 0.1, 0.2 and 0.3) using positron annihilation lifetime spectroscopy, the obtained results being treatedwithin a two-state trapping model. The observed decrease in the positron trapping rate of the glasses tested just after irradiation was explained due to renovation of destroyed covalent chemical bonds. This processwas governed bymonomolecular relaxation kinetics agreed well with corresponding changes in fundamental optical absorption edge.

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