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Title: EFFECT OF GAMMA – RAY ON STRUCTURAL AND OPTICAL PROPERTIES OF CADIMUM SULFIDE (CdS) THIN FILMS

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Title:
EFFECT OF GAMMA – RAY ON STRUCTURAL AND OPTICAL PROPERTIES OF CADIMUM SULFIDE (CdS) THIN FILMS
Author Name:
FAISAL HAMAD ANTAR
Abstract:
In this work, CdS thin films have been deposited onto the glass substrates by thermal evaporation technique in vacuum of the order of 10–5 mbar. at different thickness. The effect of gamma radiation from Co-60 by with ray dose 20 Mrad on the structural and optical properties of the CdS thin films was investigated. The crystal structure and orientation of the CdS thin films were investigated by X-ray diffraction (XRD) patterns. The optical transmittance measurements were recorded by using a double beam spectrophotometer. The XRD spectra indicate that the films are of polycrystalline structure before and after irradiation with a preferential growth of crystallites in the (002) plane. The grain size of crystallites was found to be in the range of 9-32 nm. After gamma irradiation, the result indicates that the intensity of XRD spectra and grain size of crystallites increases, while the optical energy gap decreases.
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