Performance test of passive radon-thoron discriminative detectors on environmental parameters
Performance test of passive radon-thoron discriminative detectors on environmental parameters
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DOI：
10.1016/j.radmeas.2012.04.003
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发表时间：
2012-06-01
影响因子：
2
通讯作者：
Ishikawa, Tetsuo
中科院分区：
文献类型：
--
作者：
Sorimachi, Atsuyuki;Tokonami, Shinji;Ishikawa, Tetsuo
本文介绍了湿度，风和空气中的环境气溶胶如何影响被动探测器的探测响应。使用了两种基于被动氡（Rn-222）-钍射气（Rn-220）鉴别测量技术的α轨道探测器：由日本国立放射科学研究所开发和校准的Raduet和Radopot探测器。最初的实验表明，对于Raduet探测器，Rn-220在具有高空气交换率的海绵上的渗透率比Radopot探测器在过滤器上的渗透率低三分之一。两种探测器的Rn-222探测响应对湿度的依赖性很小。对于Rn-220，在高湿度条件下，两种检测器对高空气交换率的检测响应似乎略有下降。Radopot探测器的Rn-220探测响应受风速的影响很小。高空气交换率的Raduet探测器的Rn-220探测响应似乎在低风速下降低。此外，在存在和不存在环境气溶胶颗粒的情况下，检测响应之间几乎没有差异，因为环境气溶胶在被动扩散期间分别通过Raduet和Radopot检测器的海绵和过滤器过滤掉。(C)2012爱思唯尔有限公司保留所有权利。
This paper describes how humidity, wind and ambient aerosols in air influence the detection responses of passive detectors. Two types of alpha track detectors based on a passive radon (Rn-222)-thoron (Rn-220) discriminative measurement technique were used: the Raduet and Radopot detectors that were developed and calibrated by the National Institute of Radiological Sciences, Japan. The initial experiment showed that the infiltration rate of Rn-220 onto sponges with a high air exchange rate for the Raduet detectors was one third lower than that onto filters for the Radopot detectors. Little distinct dependence on humidity was observed for the Rn-222 detection responses of both detectors. For Rn-220, the detection responses of both detectors for the high air exchange rate seemed to decrease slightly at high humidity conditions. The Rn-220 detection responses of the Radopot detectors had little influence from wind speed. The Rn-220 detection responses of the Raduet detectors for the high air exchange rate seemed to decrease at low wind speeds. Furthermore, there was little difference between the detection responses in the presence and absence of ambient aerosol particles because the ambient aerosols were filtered out during their passive diffusion through the sponges and filters for the Raduet and Radopot detectors, respectively. (C) 2012 Elsevier Ltd. All rights reserved.