Appl Opt. 2023 Apr 10;62(11):2734-2739. doi: 10.1364/AO.486050.
Cerium-doped lutetium yttrium orthosilicate (LYSO:Ce) powder has been synthesized by the co-precipitation method. The influence of the Ce3+ doping concentration on the lattice structure and luminescence characteristics of LYSO:Ce powder was investigated by X-ray diffraction (XRD) and photoluminescence (PL). The XRD measurement indicates that the lattice structure of LYSO:Ce powder was not changed by doping ions. PL results show that LYSO:Ce powder has better luminescence performance when the Ce doping concentration is 0.3 mol%. In addition, the fluorescence lifetime of the samples was measured, and the results show that LYSO:Ce has a short decay time. The radiation dosimeter was prepared by LYSO:Ce powder with a Ce doping concentration of 0.3 mol%. Radioluminescence properties of the radiation dosimeter also were studied under X-ray irradiation at doses from 0.03 to 0.76 Gy, with dose rate from 0.09 to 2.284 Gy/min. The results show that the dosimeter has a certain linear relationship response and stability. The radiation responses of the dosimeter at different energies were obtained under X-ray irradiation with X-ray tube voltages ranging from 20 to 80 kV. The results show that the dosimeter has a certain linear relationship response in the low energy range of radiotherapy. These results indicate the potential application of LYSO:Ce powder dosimeters in remote radiotherapy and online radiation monitoring.
掺铈硅酸钇镥（LYSO:Ce）粉末通过共沉淀法合成。通过 X 射线衍射（XRD）和光致发光（PL）研究了 Ce3+掺杂浓度对 LYSO:Ce 粉末晶格结构和发光特性的影响。XRD 测量表明，掺杂离子未改变 LYSO:Ce 粉末的晶格结构。PL 结果表明，当 Ce 掺杂浓度为 0.3 mol%时，LYSO:Ce 粉末具有更好的发光性能。此外，还测量了样品的荧光寿命，结果表明 LYSO:Ce 具有较短的衰减时间。用 Ce 掺杂浓度为 0.3 mol%的 LYSO:Ce 粉末制备了辐射剂量计。还研究了 X 射线辐照下剂量率为 0.09 至 2.284 Gy/min、剂量从 0.03 至 0.76 Gy 时辐射剂量计的发光性能。结果表明，剂量计具有一定的线性响应和稳定性。在 X 射线管电压为 20 至 80 kV 的 X 射线辐照下获得了不同能量下剂量计的辐射响应。结果表明，剂量计在放射治疗的低能范围内具有一定的线性响应关系。这些结果表明 LYSO:Ce 粉末剂量计在远程放射治疗和在线辐射监测中的潜在应用。
