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Resonant Raman spectra of stoichiometric glass (g) g-As 40 Se 60 have been investigated. It was observed that the increasing of excitation radiation energy hν > E 0 (E 0 is pseudogap width) changes a shape, intensity, and position of Raman peaks of g-As 40 Se 60 . The structure and vibration spectra of some As-Se clusters were calculated applying the ab initio method. In order to elucidate structural features of g-As 40 Se 60 , we combined the experimental Raman data and theoretical calculations.doi:10.15407/spqeo7.02.171 fatcat:cuzoa3hdxvczxixbvqh3msziae