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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 t o be fairly well described b y the theory of light scattering in an absorbing medium. A deviation from this theory is observed a t the peak corresponding to the RS-forbidden At'(L0) mode of GaSe. It is explained by the contribution of the surface vibrational states t o the RS cross-section a t this peak. HccneEoBaIm cnempbr HOn~6HIla~kiOHHOrO paccemnsi (KP) B meHKax cenemna II~I J I~I I O I C EocTaTosHo xopolrro OrrmbIBaeTca TeopEieH paccemm cBeTa B nornowarnuel4 1 1 0~ B HP A;I(Lo) Mane GaSe. TO 06?, HCHReTCR BmaAoM B ceYeHme KP Ha TOM n m e cyJIb@HAa raJIJIIIR. nOHa3aH0, 9 T O H3MeHeHlle B ElHTeHCIlBHOCTkl ICP llHKOB C TOJIUrEiHOt CpeAe. OTHJIOHeHkle OT 3 T O t TeOpHH Ha6nIoAaeTCH Ha ITEIKe, COOTBeTCTByIoWeB 3aIIpeWeH-IlOBepXIIOCTHbIX KOJle6aTeJlbHbIX COCTOHHHfi.

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