Franci Daniele, Aureli Tommaso
Department of Rome, ARPA Lazio, Via Giuseppe Saredo 52, Rome 00100, Italy.
Radiat Prot Dosimetry. 2014 Jan;158(1):107-10. doi: 10.1093/rpd/nct193. Epub 2013 Aug 4.
Solid-state nuclear track detectors are commonly used for the detection of indoor radon levels. However, despite numerous advantages, this technique still presents many unsolved problems. An important source of error is represented by the reduction in the detection efficiency due to overlapping tracks, which results in a sensible underestimation of the radon levels. This paper presents a new experimental procedure to address the effect of overlapping tracks by establishing a relationship between the detection efficiency and the number of detected tracks. Experimental data have been collected at the radon chamber of the Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti (INMRI), at the ENEA centre in Casaccia, using CR-39 detectors provided by Radosys Ltd. It has been proved that the method, applied to the experimental settings of this study, gives reliable results up to 7607 kBq h m(-3). Finally, the method has been validated through a Monte Carlo simulation, exploring a wide range of radon exposure.
固态核径迹探测器通常用于检测室内氡水平。然而，尽管有许多优点，但该技术仍存在许多未解决的问题。一个重要的误差来源是由于径迹重叠导致检测效率降低，这会导致对氡水平的明显低估。本文提出了一种新的实验程序，通过建立检测效率与检测到的径迹数量之间的关系来解决径迹重叠的影响。使用Radosys Ltd提供的CR-39探测器，在位于卡萨西亚的ENEA中心的意大利国家电离辐射计量研究所（INMRI）的氡室中收集了实验数据。已经证明，应用于本研究实验设置的该方法在高达7607 kBq h m(-3)的情况下能给出可靠的结果。最后，通过蒙特卡罗模拟对该方法进行了验证，探索了广泛的氡暴露范围。
