Abstract Cerium doped yttrium aluminum garnet (YAG:Ce) crystal powders were synthesized using the sol-gel method. The effects of doping concentration and sintering atmosphere were investigated via X-ray diffraction (XRD), photoluminescence (PL), and cathodoluminescence (CL). The XRD measurement indicates that doping ions do not change the crystal lattice structure of YAG crystal. PL results show that YAG:Ce samples sintered in inert atmosphere have better luminescence property around 550 nm and the optimum Ce doping concentration is 0.5 mol% as an optimal YAG:Ce powder to fabricate a dosimeter probe. Radioluminescence (RL) properties of crystal dosimeter also has been studied using clinical linear accelerator at the ultra-low dose from 3.6 to 27 cGy with dose rate from 80 to 600 cGy/min. RL measurements for dose rate and total dose show a good linear response of intensity, indicating potential applications in remote radiotherapy and radiation monitoring.

中文翻译：

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YAG:Ce晶体放疗用溶胶-凝胶法的发光表征

摘要 采用溶胶-凝胶法合成了掺铈钇铝石榴石(YAG:Ce)晶体粉末。通过 X 射线衍射 (XRD)、光致发光 (PL) 和阴极发光 (CL) 研究了掺杂浓度和烧结气氛的影响。XRD 测量表明掺杂离子不会改变 YAG 晶体的晶格结构。PL 结果表明，在惰性气氛中烧结的 YAG:Ce 样品在 550 nm 附近具有更好的发光性能，最佳 Ce 掺杂浓度为 0.5 mol% 作为制造剂量计探针的最佳 YAG:Ce 粉末。还使用临床直线加速器在 3.6 至 27 cGy 的超低剂量和 80 至 600 cGy/min 的剂量率下研究了晶体剂量计的放射发光 (RL) 特性。