Kurata N, Kubota N, Takei Y, Nanto H
Advanced Materials Science R&D Center, Kanazawa Institute of Technology, 3-1 Yatsukaho, Mattou, Ishikawa 924-0838, Japan.
Radiat Prot Dosimetry. 2006;119(1-4):398-401. doi: 10.1093/rpd/nci515. Epub 2006 May 30.
CsBr phosphor ceramics doped with different luminescence centres such as In2O3, Eu2O3, EuCl3, SmCl3, TbCl3, GdCl3 or NdCl3 as the candidate for a new optically-stimulable phosphor for medical X-ray imaging sensor were prepared using a conventional ceramic fabrication process. It was found that X-ray-irradiated Eu-doped CsBr (CsBr:Eu) exhibited intense optically stimulated luminescence (OSL). The peak wavelength of the OSL emission and stimulation spectra of CsBr:Eu phosphor ceramic sample were 450 and 690 nm, respectively. The dependence of OSL properties on the conditions of preparation of phosphor ceramic samples, such as Eu concentration, sintering temperature and sintering time, were studied. The optimum preparation conditions were also studied. It was found that the OSL intensity of CsBr:Eu phosphor ceramics fabricated under optimum preparation conditions is higher than that of commercially available imaging plates using BaFBr:Eu.
采用传统陶瓷制备工艺制备了掺杂不同发光中心（如In2O3、Eu2O3、EuCl3、SmCl3、TbCl3、GdCl3或NdCl3）的CsBr磷光体陶瓷，作为医学X射线成像传感器新型光激发磷光体的候选材料。研究发现，X射线辐照的Eu掺杂CsBr（CsBr:Eu）呈现出强烈的光激发发光（OSL）。CsBr:Eu磷光体陶瓷样品的OSL发射峰波长和激发光谱分别为450和690nm。研究了OSL性能对磷光体陶瓷样品制备条件（如Eu浓度、烧结温度和烧结时间）的依赖性。还研究了最佳制备条件。结果发现，在最佳制备条件下制备的CsBr:Eu磷光体陶瓷的OSL强度高于使用BaFBr:Eu的市售成像板。
