Comparison of discrimination methods for alpha radiation signals using imaging plates.
Comparison of discrimination methods for alpha radiation signals using imaging plates.
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DOI：
10.1093/rpd/ncs203
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发表时间：
2012-11
影响因子：
1
通讯作者：
Bo Chen;W. Zhuo
中科院分区：
文献类型：
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作者：
Bo Chen;W. Zhuo
不同辐射信号的识别对于利用成像板(IP)技术对天然放射性核素进行定量测量具有重要意义。本研究从线性响应、α信号与β信号的识别能力和检测不确定度三个角度对已提出的4种识别和计数入射α信号的算法进行了实验比较。结果表明，所有方法都具有良好的线性响应，可以区分α信号和β信号。一般来说，感兴趣区域(ROI)越大，检测效率越高，但α信号和β信号的区分能力较差。综合考虑探测效率和探测不确定度，采用5×100μm×100μm感兴趣区的算法被认为是最适合α辐射定量测量的方法。
The discrimination of different radiation signals is important for quantitative measurements of naturally occurring radionulides by using the technique of imaging plates (IPs). In this study, four discrimination algorithms previously proposed for discriminating and counting the incident alpha signals were experimentally compared from the view points of linearity response, the discrimination capability of alpha signals from beta signals and the detection uncertainty. The results showed that all the methods had a good linearity response and could discriminate alpha signals from beta signals. In general, a larger region of interest (ROI) has a higher detection efficiency, but the discrimination capability of alpha signals from beta signals is worse. By taking into account both the detection efficiency and the uncertainty of detection, the algorithm using an ROI of 5 × 100 μm × 100 μm was considered to be the most appropriate method for quantitative measurements of alpha radiation.