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Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga up to 5 at. %, using complementary techniques of positron annihilation lifetime spectroscopy, X-ray powder diffraction, and scanning electron microscopy with energy-dispersive X-ray analysis...
Instability effects caused by high‐energy γ‐irradiation are studied in (As2S3)1‐x(Sb2S3)xglasses (x=0, 0.1, 0.2 and 0.3) using positron annihilation lifetime spectroscopy, the results being treated within two‐state trapping model in both normal and high‐measurement statistics. The observed decrease in positron trapping rate of the glasses tested just after γ‐irradiation was explained due to renovation...
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