实现90的实时水中监测:对CaF2和ZnSeAl,O闪器的性能评估
Arjana Kolnikaj1, Kelum A A Gamage1, Olaoluwa Popoola1
1James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
开发了一种新的β-光谱系统,用于实时监测地下水中的90 (Sr-90). 在现场检测方面,ZnSe(Al,O) 闪器表现出优于CaF2(Eu) 的性能.
科学领域:
- 核仪器仪表 核仪器仪表 核仪器仪表 核仪器仪表
- 环境监测环境监测环境监测
- 放射化学 放射化学是指辐射化学.
背景情况:
- -90 (Sr-90) 是地下水中的一个重要的放射性核酸污染物.
- 实时,现场监测对于有效的环境修复至关重要.
- 现有的β光谱法可能在现场部署方面存在局限性.
研究的目的:
- 为了研究一个紧的,用于Sr-90监测的现场β光谱系统.
- 为了评估与SiPM相结合的CaF2(Eu) 和ZnSe(Al,O) 闪器的性能.
- 将实验结果与蒙特卡洛模拟进行检测器优化.
主要方法:
- 使用光倍增器 (SiPMs) 的CaF2(Eu) 和ZnSe(Al,O) 闪器的实验评价.
- 开发定制的前端电子设备用于信号采集.
- 蒙特卡洛模拟使用Geant4工具包来模拟探测器响应.
主要成果:
- ZnSe(Al,O) 显示出更高的光产量和光学传输,与模拟 (R2 ≈ 0.86) 保持一致.
- ZnSe(Al,O) 实现了较高的相对检测效率 (~61.5%) 并准确地捕获了Sr-90/Y-90频谱.
- 由于依赖能源的损失,CaF2(Eu) 与模拟的一致性较差 (χ2/NDF ≈179) 和效率较低 (~22.7%).
结论:
- ZnSe ((Al,O) 是水下,in situ Sr-90β光谱系统的首选闪器.
- 识别了读出电子的实际局限性,而不是通过模拟捕捉到的.
- 未来的设计应该专注于优化SiPM合和晶边反射性,以提高性能.
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