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Abstract
Here, we successfully prepared Tb3+-activated borogermanate glass by the traditional melt-quenching method. The optical and scintillating properties were investigated by using photoluminescence, transmission spectra, luminescence decay curves and X-ray excited luminescence. High content of Gd2O3 was added into borogermanate glass to improve the density of glass (about 5.52 g/cm3), and thus to enhance the radiation stopping power. Al powder was introduced into the composition as reducing agent. Due to incorporation of Al powder, the internal quantum efficiency of glass increases from 18.8% to 56.3%. Meanwhile, the integrated intensity of X-ray excited luminescence of glass promotes from 29.8% to 46.6% compared to Bi4Ge3O12 scintillating crystal. All above results declare that Al powder as reducing agent can strengthen the optical and scintillating properties of Tb3+-activated borogermanate glass.
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