追溯辐射剂量测量的技术
1Nuclear Radiation Management and Application Division, Defence Laboratory, Defence Research and Development Organization (DRDO), Jodhpur 342011, India.
Radiation protection dosimetry
|July 17, 2024
概括
回溯辐射剂量计使用环境材料和生物样本来测量传统剂量计无法使用的辐射剂量. 热发光 (TL) 和电子自旋共振 (ESR) 等技术可以对马辐射和生物样本进行剂量评估.
科学领域:
- 辐射保护和核安全.
- 环境监测和评估.
- 生物物理学和辐射生物学.
背景情况:
- 辐射剂量测量对于评估暴露于电离辐射的生物损伤至关重要.
- 传统的剂量计往往无法用于回顾性剂量评估.
- 环境材料和生物样本可以作为回顾性辐射传感器.
研究的目的:
- 审查追溯辐射剂量测量方法,设备和系统的进展.
- 突出使用环境材料和生物样本进行剂量测量.
- 介绍便携式污染监测系统的发展情况.
主要方法:
- 使用热发光 (TL) 技术与环境材料 (沙子,,陶,石英等) 对于追溯的玛剂量测量 (10 cGy分钟).
- 在生物样本 (牙面膜,骨,指甲,头发) 上使用电子旋转共振 (ESR) 技术进行剂量测量 (~20 cGy最小剂量).
- 开发了便携式污染监测系统,用于食品和水中的放射性 (50 Bq kg-1 到 1000 kBq kg-1 在 60 秒内).
主要成果:
- 环境材料和商业玻璃是有效的回顾性玛剂量测量使用TL.
- 在使用生物样本进行回顾性剂量测量时,可以使用ESR技术.
- 便携式系统有效监测食品和水中的放射性.
结论:
- 使用环境和生物材料的回顾性剂量测量是当传统方法失败时可行的替代方案.
- 对方法和设备的持续研发提高了辐射剂量计的能力和自力更生.
- 便携式监测系统对于内部污染评估和剂量估计至关重要.
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