An instrument for measuring the unattached fraction of radon progeny with etched track detectors
An instrument for measuring the unattached fraction of radon progeny with etched track detectors
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DOI：
10.1088/0952-4746/30/3/014
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发表时间：
2010-09
影响因子：
1.5
通讯作者：
Lei Zhang;W. Zhuo;Q. Guo;Lu Guo;B. Shang
中科院分区：
文献类型：
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作者：
Lei Zhang;W. Zhuo;Q. Guo;Lu Guo;B. Shang
为了测量氡子体的未附着部分，开发了一种新型便携式、低成本、可重复使用的带有蚀刻径迹探测器的集成监测器（CR-39）。该监测仪同时给出未附着的 222Rn 子代 (EECRnu)、附着的 222Rn 子代 (EECRna) 以及 220Rn 子代 (EECTn) 的平均平衡当量浓度。根据蒙特卡罗方法计算出的检测效率，计算得出，在2.92 l min−1的流速下积分采样24 h，EECRnu、EECRna和EECTn的检测下限分别为0.03 Bq m−3、0.12 Bq m−3和0.07 Bq m−3。通过一系列比对实验证实了新监测仪的有效性。
To measure the unattached fraction of radon progeny, a new type of portable, low cost, reusable integrating monitor with etched track detector (CR-39) was developed. This monitor simultaneously gives the average equilibrium-equivalent concentrations of unattached 222Rn progeny (EECRnu), attached 222Rn progeny (EECRna) and also 220Rn progeny (EECTn). It was calculated, according to the detection efficiencies which were derived by the Monte Carlo method, that the lower detection limits for EECRnu, EECRna and EECTn are 0.03 Bq m−3, 0.12 Bq m−3 and 0.07 Bq m−3, respectively for 24 h integrating sampling at a flow rate of 2.92 l min−1. The validity of the new monitor was confirmed through a series of intercomparison experiments.