对222Rn校准的电离室特征的评估
Rio Furukawa1, Miroslaw Janik2, Satoshi Kodaira2
1National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Radiation protection dosimetry
|November 14, 2024
概括
日本国家计量研究所开发了用于子监测器校准的电离室 (IC) 校准的新方法. 该研究成功评估了IC.
科学领域:
- 计量学 计量学 计量学
- 辐射物理学 辐射物理学
- 环境科学 环境科学
背景情况:
- 对子监测器的准确校准对于环境和健康评估至关重要.
- 电离室 (IC) 是辐射测量和校准的重要工具.
- 建立可靠的工作标准,用于子校准是一个关键的计量挑战.
研究的目的:
- 开发和验证用于内部透过型电离室 (IC) 的新校准方法.
- 在日本国家计量研究所建立IC作为校准子监测器的工作标准.
- 在不同的采样条件下,评估校准因子 (CF) 和其对IC的不确定性.
主要方法:
- 采用内穿式电离室 (IC) 作为主要标准.
- 开发了用于精确校准IC的新方法.
- 测量的IC输出电流为10^-13A.
- 在IC中,在连续气流和静止气填充条件下评估的校准因子.
主要成果:
- 对IC的校准系数 (CF) 确定为 (2.0 ± 0.2) × 10^16 Bq m^-3 A^-1.
- 对CF的扩展不确定性 (k=2) 进行了严格的评估.
- 在连续气流和静止气填充条件下获得的校准因子在评估的不确定性范围内一致.
结论:
- 开发的新方法提供了一种可靠的方法,用于校准用于子测量的电离室.
- 评估的校准系数确定了IC作为一个可行的工作标准,用于子监测器校准.
- 在不同的采样条件下CF的一致性验证了校准方法的稳定性.
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