241Am:用于制造和校准参考α波器的新核化物
Grégoire Dougniaux1, Benoît Sabot2, Bernadette Dhieux Lestaevel1
1Autorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LPMA, Saclay, F-91400, France.
概括
美国-241 (241Am) 为校准α粒子测量仪器提供了可追溯和非破坏性的方法,改善了核安全和环境监测. 这种核化物避免了与-239 (239Pu) 过器破坏和液体闪计数相关的挑战.
科学领域:
- 核安全和环境监测 核安全和环境监测
- 放射化学和计量学 放射化学和计量学
- 辐射检测和测量 辐射检测和测量
背景情况:
- 对过器进行精确的放射性核素活性测量对于核安全和环境监测至关重要.
- 目前使用-239 (239Pu) 进行α粒子校准的方法需要破坏波器,从而带来实际挑战和不确定性.
- 美国-241 (241Am) 被提议作为替代参考核化物,因为它适合对α测量和非破坏性分析.
研究的目的:
- 评估美洲-241 (241Am) 作为对-239 (239Pu) 的可行替代品,用于校准α粒子测量仪器.
- 为了证明可追溯的参考波器的生产使用241Am与定义的活动和空气动力学颗粒大小.
- 通过比较校准来确认使用241Am用于α参考过器的优点.
主要方法:
- 使用ASNR的ICARE测试台生产含有241Am的参考过器.
- 通过使用高纯度日耳曼 (HPGe) 频谱仪进行马射线光谱测量,测量参考活性.
- 在与气体相称的计数器上进行校准比较,使用带有241Am和239Pu的PTFE膜过器.
主要成果:
- 成功生产了具有定义的241Am活性和AMAD的参考波器.
- 马射线光谱仪提供了准确的241Am活动确定,不确定性最小.
- 校准比较证实了241Am与239Pu在α基准波器中的优势,显示了高精度和非破坏性测量.
结论:
- 美国-241 (241Am) 是适合用于α过器校准的参考核化物,可提供可追溯性和非破坏性测量.
- 采用241Am通过克服与239Pu相关的实际挑战,提高了放射性污染监测的可靠性.
- 使用241Am开发的方法提高了核安全和环境监测过程的准确性和效率.
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