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VOLUME 26 (1977) | ISSUE 6 | PAGE 455
Observation of excitons in thin surface layers of CdS
Anomalies of the dispersion and the appearance of a new band in the spectrum of the reflection from the surface of a CdS single crystal bombarded with Ar40 have been observed, simultaneously with a sharp increase of the intensities (J2) of the emission of the band of excitons bound on Vs and of the electron-hole condensate in the surface layer (Ps band).