Abstract
In this research the effect of irradiation on the optical properties of the pure films CdO was studied prepared of the subjected to Gamma –Ray with energy (0.662MeV ) for (5,10)min and (24)hours .Optical properties results , irradiation Gamma–Ray leads to decrease in energy gap value. It turns out that Gamma–Ray had apronoced effect on the optical proportion of CdO films.