This research includes a study of some optical properties of (ps) before and after x-ray irradiation in doses 8010 rad with average (267 rad/min ) for (30 min) ,the x-ray application where done in 4 steps, 7.5 mints for each step. The study of optical properties had included measurement of absorbance, transmission, refractive index has been measured for all concentration before and after irradiation, as well as the reflectivity, and absorption coefficient has been measured. The results shown that the value of absorbance and reflectivity, are increases as the solution concentration increased before and after irradiation. Then we seen the value of transmission are decreases as the solution concentration increased before and after irradiation while the refractive index value is increases as the solution concentration increased before increases as the solution concentration increased before and after irradiation and decrease after irradiation finally the value of absorption coefficient are decreased when the solution concentration increased before irradiation and increase after irradiation. All measurements are calculated at a constant temperature approximately to (25oC). The reason for the change at value of properties may be due to cross linking of polymer chains and then increased the average viscosity molecular weight for material (PS) that used in this research.

X-ray, Ps, Optical Properties, Absorbance, Reflectivity, Transmission, Refractive Index, Absorption Coefficient.