Abstract
In this paper, the optical properties investigated and the effect of the gamma irradiation on the optical constant in addition to the energy band gap (Eg) of Sudan black stain doped Poly Methyl Methacrylate (PMMA) thin films. Thin films of 20% Sudan black stain/PMMA doping ratio was used to prepared three concentrations (1, 0.7, 0.4) x10-3 M. all the Dye/ Polymer solution (three different concentrations) deposited on glass substrate by using a free casting method at room temperature. The UV-Visible absorbance and transmittance spectra at the 300 - 800 nm wavelength range were used to investigate the optical properties of the films. The optical constant such as linear absorption coefficient, the extinction coefficient, and Eg were calculated. Results showed an increasing in the optical properties after irradiation with γ rays with activity 16 gray/hour, while Eg was decreasing after irradiation.
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