在开放环境中使用放射发光的阿尔法发射器的远程成像:白天和夜间应用
Lingteng Kong1, Thomas Bligh Scott1, John Charles Clifford Day1
1HH Wills Physics Laboratory, Interface Analysis Centre, School of Physics, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK.
Sensors (Basel, Switzerland)
|August 29, 2024
概括
这项研究介绍了一种新型的α相机,用于远程检测等α发射器. 该系统在开放环境中成功检测到α射线发光,克服了环境光的挑战,提高了安全性和监控.
科学领域:
- 核物理和辐射检测 核物理和辐射检测
- 环境科学与监测环境科学与监测
- 光学工程是指光学工程.
背景情况:
- 阿尔法发射物在摄入时会带来严重的健康风险 (DNA损伤,癌症).
- 传统的检测方法需要非常接近,从而造成安全风险和低效率.
- 远程α射线发光 (RL) 检测是一种有希望但具有挑战性的替代方案,特别是在环境光线下.
研究的目的:
- 为了证明在开放的现实环境中远程检测阿尔法发射器的可行性.
- 开发和验证一个能够克服环境光干扰的紧型α相机系统.
- 为了确定阿尔法摄像机在各种照明条件下的检测极限和操作范围.
主要方法:
- 使用了一台紧型α相机,配备了深冷CCD和低f数镜头系统.
- 采用双波系统 (337nm和343nm) 进行夜间阿尔法RL检测和背景光减去.
- 实现了一堆倾斜的276nm短通波器,用于在模拟城市照明下白天检测.
主要成果:
- 在夜间成像过程中,成功地在一分钟内从1米远的地方检测到3MBq的α源.
- 达到了75kBq的alpha发射器的最低检测极限.
- 在白天模拟期间,在间接阳光下在10分钟内在70厘米处启用了α源的检测.
结论:
- 开发的紧型α相机可用于在开放环境中远程光学检测α发射器.
- 该系统有效地减轻了环境光干扰,用于白天和夜间监控.
- 这项技术为环境监测和辐射安全应用提供了重大进步.
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