在还原气氛下制备了Sn ²⁺掺杂SiO₂-B₂O₃-Gd₂O₃-La₂O₃玻璃,并测试了该玻璃的密度、吸收光谱、光致发光、荧光寿命和X射线激发下的辐照发光。研究结果表明,在SiO₂-B₂O₃-La₂O₃玻璃系统中,随着Sn ²⁺浓度的增大,紫外吸收截止波长红移, 荧光强度先增大后因浓度淬灭而减小,在Sn ²⁺浓度为0.3%时达到最大。随着Gd₂O₃逐渐取代La₂O₃,玻璃的密度增大,Sn ²⁺的荧光寿命变短,但未发现Gd ³⁺对Sn ²⁺的敏化增强作用。在X射线激发下,Sn ²⁺的辐照发光强度随着Gd₂O₃浓度的增大而增大,且不因Gd ³⁺浓度淬灭而减小,说明在X射线激发下,Gd ³⁺和Sn ²⁺之间可能存在能量传递。

The Sn 2+-doped SiO2-B2O3-Gd2O3-La2O3 glass is prepared in the reducing atmosphere and its density, absorption spectra, photoluminescence, fluorescence lifetime and radioluminescence excited by X-ray have been tested. The research results show that, in the SiO2-B2O3-La2O3 glass system, with the increase of Sn 2+concentration, the ultraviolet absorption cut-off wavelength is redshifted, and the photoluminescence intensity first increases and then decreases due to the concentration quenching effect, which reaches the maximum at Sn 2+ concentration of 0.3 %. With the replacement of La2O3 by Gd2O3, the glass density increases and the fluorescence lifetime of Sn 2+ gets shorter, but Gd 3+ does not show the sensitizing enhancement effect on Sn 2+. Under the X-ray excitation, the radioluminescence intensity of Sn 2+ increases with the increase of Gd2O3 concentration and does not decreases under the Gd 3+ concentration quenching effect, which indicates that maybe there exists the energy transfer between Gd 3+ and Sn 2+ under the X-ray excitation.