摘要: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。
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