A new technique for measuring the concentrations of airborne radon progeny by using an imaging plate.
A new technique for measuring the concentrations of airborne radon progeny by using an imaging plate.
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DOI：
10.1093/rpd/ncs202
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发表时间：
2012-11
影响因子：
1
通讯作者：
Hui Zhang;Bo Chen;C. Zhao;Weihai Zhuo
中科院分区：
文献类型：
--
作者：
Hui Zhang;Bo Chen;C. Zhao;Weihai Zhuo
提出了一种利用成像板测量空气中氡子体浓度的新技术。在采样后的2-5、6-20和21-30 min，用IP测量采样滤膜上收集的氡子体浓度，并用自行开发的图像分析软件自动计数α衰变。为了减少对α计数的重叠影响，在采样过滤器和IP之间设置了厚度为0.5 mm的塑料隔板。在10 l min（-1）采样10 min时，氡的平衡当量浓度的检测下限估计为3.5 Bq m（-3）。对比实验表明，用新技术测量的结果与α谱仪测量的结果一致。结果表明，该技术是一种精确测量气氡子体浓度的有效方法。
A new technique was developed for measuring the concentrations of airborne radon progeny by using an imaging plate (IP). The concentrations of radon progeny collected on the sampling filter were measured with the IP at 2-5-, 6-20- and 21-30-min intervals after sampling, and the alpha disintegrations were automatically counted by a self-developed image analysis software. To reduce the overlapping impact on alpha counts, a plastic separator with a 0.5-mm thickness was set between the sampling filter and the IP. The lower limit of detection for the equilibrium equivalent concentration of radon was estimated to be ∼3.5 Bq m(-3) for a 10-min sampling at 10 l min(-1). Comparison experiments showed that results measured with the new technique were well consistent with those measured with the alpha spectrometer. It indicates that the new technique is a useful method for accurate measurements of airborne radon progeny concentrations.