دراسة تاثير التشعيع على الخواص البصرية لغشاء اوكسيد البزموث

Thin films of Bi2 O3 were prepared by using Thermal Evaporation System on glass substrate. The films were exposed to a low dose of X- rays. The optical properties of thin films were studied before and after irradiation in the fundamental absorption region from their absorption and transmission spectra. The energy gap of direct allowed and forbidden are measured also the absorption coefficient, the extinction coefficient, the index of refraction and dielectric . constant in its two parts and optical conductivity, were calculated.