Abstract Bi-loaded plastic scintillators were successfully synthesized using the solvent evaporation method and were used as detectors for synchrotron X-ray radiation. The photoluminescence emission spectra and X-ray-excited radioluminescence spectra of all prepared plastic scintillators presented broad emission bands in the range of 350–500 nm, which derived from the fluorescence of the organic phosphor, 2-(4-tert-butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole. The detection efficiency of 1 mm thick plastic scintillators for high-energy X-ray photons was increased by the addition of Bi compounds (up to 2.3 wt%) and reached 67% of that of EJ-256, the commercially available Pb 5 wt% loaded plastic scintillator. Subnanosecond time resolution was successfully achieved for all scintillators.

中文翻译：

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溶剂蒸发合成双载塑料闪烁体的X射线探测特性

摘要 采用溶剂蒸发法成功合成了双负载塑料闪烁体，并将其用作同步辐射X射线的探测器。所有制备的塑料闪烁体的光致发光发射光谱和 X 射线激发的辐射发光光谱都呈现出 350-500 nm 范围内的宽发射带，其来源于有机磷光体 2-(4-叔丁基苯基)- 5-(4-联苯基)-1,3,4-恶二唑。通过添加 Bi 化合物（高达 2.3 wt%）提高了 1 mm 厚塑料闪烁体对高能 X 射线光子的检测效率，达到了 EJ-256（市售 Pb 5 wt%）的 67%加载的塑料闪烁体。所有闪烁体都成功实现了亚纳秒时间分辨率。