Effect of ray on direct allowed transitions of CdO thin films doped by Mg and deposited by chemical spray pyrolysis technique


Thin films of CdO and CdO doped with Mg have been prepared using spray pyrolysis technique. Transmission and absorption spectra have been recorded to these films. The as deposited thin films were exposed to - rays. We have studied the transmission, absorptions and absorption coefficient as a function of photon energy before and after irradiation. It was found that the forbidden energy gap decreases after irradiation for the direct allowed transitions.