Modified Positron Annihilation Model for Glassy-Like As$\text{}_{2}$Se$\text{}_{3}$

An approach to structural characterization of chalcogenide glasses based on the study of void distribution is discussed. The results of positron annihilation lifetime spectra measurements for glassy-like g-As$\text{}_{2}$Se$\text{}_{3}$ are compared with nano-void distribution data obtained from Monte Carlo simulation. In this consideration perspectives to involve the parameters of nano-voids calculated from the first sharp diffraction peak in the framework of known Elliott's model are analyzed.