The spectra of Raman scattering (RS) in gallium selenide and sulfide films are investigated. The variation in the intensity of RS peaks with the film thickness is shown to be fairly well described by the theory of light scattering in an absorbing medium. A deviation from this theory is observed at the peak corresponding to the RS-forbidden A mode of GaSe. It is explained by the contribution of the surface vibrational states to the RS cross-section at this peak.
[Russian Text Ignored].