发光学报2017，Vol.38Issue(1)：37-44,8.DOI:10.3788/fgxb20173801.0037
Ce3＋和 Tb3＋掺杂钆-钡-硅酸盐闪烁玻璃的发光性能
Luminescence Properties of Ce3 + and Tb3 + Doped Gd-Ba-silicate Scintillating Glass
摘要
Abstract
Novel Tb3 + or Ce3 + doped and Tb3 + / Ce3 + codoped Gd-Ba-silicate scintillating glasses were synthesized by melt-quenching method. The luminescence properties were studied by transmis-sion spectra, photoluminescence excitation and emission spectra, X-ray excited luminescence spec-tra and luminescence decay curves. The results show that Tb3 + doped scintillating glasses exhibit bright green emission at about 544 nm and Ce3 + doped scintillating glasses have a strong purplish-blue light under ultraviolet excitation. For Tb3 + / Ce3 + codoped scintillating glasses, Ce3 + ions can strongly sensitize the luminescence of Tb3 + ions under both UV and X-ray excitation, which is caused by the energy transfer process from Ce3 + to Tb3 + ions. The optimal doping mole fraction of Ce2 O3 in Tb3 + / Ce3 + codoped scintillating glasses was 0. 2% . In this case, the evaluated energy transfer efficiency from Ce3 + to Tb3 + is about 45. 7% . Under X-ray excitation, not only the intensity of 544 nm emission in Tb3 + / Ce3 + codoped scintillating glasses with 0. 2% of Ce2 O3 was 4. 2 times than that of 500 nm emission in the commercial Bi4 Ge3 O12 ( BGO) crystals, but also the integral scintillation efficiency was about 55. 6% of the BGO crystals. It is beneficial for reducing radiative dose to obtain high-resolution medical X-ray imaging.关键词
闪烁玻璃/Ce3 + 掺杂/Tb3 + 掺杂/能量传递Key words
scintillating glass/Ce3 + doped/Tb3 + doped/energy transfer分类
数理科学引用本文复制引用
张勇,吕景文,韩冰,姜东月,陈亮东..Ce3＋和 Tb3＋掺杂钆-钡-硅酸盐闪烁玻璃的发光性能[J].发光学报,2017,38(1):37-44,8.基金项目
国家自然科学基金(11075026)；四平市科技发展计划(2015054)资助项目Supported by Natural Science Foundation of China(11075026)； Science and Technology Development Program of Siping City (2015054) （11075026）
