The International Commission on Radiological Protection (ICRP) recently recommended a new dose conversion factor for radon based on the latest epidemiological studies and dosimetric model. It is important to evaluate an inhalation dose from radon and its progeny. In the present study, a passive radon personal monitor was designed using a small container for storing contact lenses and its performance was evaluated. The conversion factor for radon (²²²Rn), the effect of thoron (²²⁰Rn) concentration and the air exchange rate were evaluated using the calibration chamber at Hirosaki University. The minimum and maximum detectable radon concentrations were calculated. The conversion factor was evaluated as 2.0 ± 0.3 tracks cm⁻² per kBq h m⁻³; statistical analyses of results showed no significant effect from thoron concentration. The minimum and maximum detectable radon concentrations were 92 Bq m⁻³ and 231 kBq m⁻³ for a measurement period of three months, respectively. The air exchange rate was estimated to be 0.26 ± 0.16 h⁻¹, whose effect on the measured time-integrated radon concentration was small. These results indicate that the monitor could be used as a wearable monitor for radon measurements, especially in places where radon concentrations may be relatively high, such as mines and caves.

中文翻译：

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使用个人剂量测定的小容器构造的被动式Rad监测器。

国际放射防护委员会（ICRP）最近根据最新的流行病学研究和剂量学模型推荐了一种新的dose剂量转换因子。评估ra及其后代的吸入剂量很重要。在本研究中，被动式don气个人监护仪是使用一个用于存放隐形眼镜的小容器设计的，并且对其性能进行了评估。使用广崎大学的校准室评估ra的转化因子（²²² Rn），of的影响（²²⁰ Rn）和空气交换率。计算了最小和最大可检测ra浓度。换算系数评估为2.0±0.3轨道cm ^-2每kBq hm ^-3; 结果的统计分析表明，ron酮浓度没有明显影响。在三个月的测量期内，最小和最大可检测ra浓度分别为92 Bq m ^-3和231 kBq m ^-3。空气交换速率估计为0.26±0.16h ^-1，其对测得的时间积分ra浓度的影响很小。这些结果表明该监测器可用作ra测量的可穿戴监测器，尤其是在ra浓度可能相对较高的地方，例如矿山和洞穴。