在移动马光谱检测中确定孤儿137Cs源的距离,屏蔽和活动的方法
Christopher Rääf1, Mattias Jönsson1, Marius-Catalin Dinca1
1Medical Radiation Physics, Department of Translational Medicine, Lund University, Inga Marie Nilssons gata 47, Malmö, Sweden.
Radiation protection dosimetry
|August 28, 2025
概括
本研究介绍了两个Excel程序,即SODAC和SSC,用于使用移动马光谱测量来确定马源的距离,屏蔽和活动. 这些方法分析脉冲高度分布以进行有效的辐射源表征.
科学领域:
- 核仪器设备
- 辐射检测和测量
- 应用物理
背景情况:
- 移动马光谱仪收集辐射源的脉冲高度分布 (马光谱).
- 这些光谱包含了描述辐射源的关键信息,包括它们的距离,屏蔽和活动.
- 现有的方法可能需要专门的设备或复杂的分析来确定现场的源参数.
研究的目的:
- 开发和验证可从移动马光谱数据中推导辐射源参数的计算工具.
- 为了准确地确定源路距离,屏蔽质量厚度和源活动.
- 为评估各种环境中的辐射源提供实用方法.
主要方法:
- 使用移动马光谱仪通过点源获得的一系列马光谱.
- 开发了SODAC (源路距离) Excel例程,以将主要光子峰值计数率与距离依赖的函数相匹配.
- 开发了SSC (屏蔽) Excel程序,使用散射与初级光子计数率的比率计算屏蔽质量厚度.
主要成果:
- 通过分析计数率函数,SODAC程序成功确定了源路距离.
- 基于散射和原始光子比,SSC程序准确计算了常见建筑材料的屏蔽质量厚度.
- 综合方法允许随后计算源活动.
结论:
- 开发的Excel程序 (SODAC和SSC) 为确定移动马源参数提供了一种可行的方法.
- 这种技术使用-137 (137Cs) 源进行了测试,适用于各种玛辐射核化物.
- 该方法提供了使用现有工具进行现场辐射源评估的实用方法.
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