Abstract
We examined the relationship between defect formation in the UV region by X-ray irradiation and its luminescence properties of binary zinc phosphate glasses. The emergence of absorption bands in the UV region linearly increased on increasing the irradiation dose. For up to 10 Gy irradiation of X-ray from a tungsten source, the generated absorption bands disappeared after annealing at 350 °C. Moreover, the thermally stimulated luminescence (TSL) intensity linearly increased on increasing the irradiation dose. There is a linear relationship between the peak area of TSL and that of the generated absorption bands. In contrast, the absorption, i.e., defect, generated by Cu-Ka 1000 Gy irradiation survived after annealing at 350 °C. The generated defects served as emission centers of photoluminescence (PL), which was confirmed by comparison between the optical absorption and PL excitation spectra.
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