ABSTRACT Radon (222Rn) measurements were conducted in the Pileki Cave with Radim 3A Active Radon Monitor equipment. Measurements were also done with the passive sampling method with CR-39 nuclear track detectors by exposing them for three months in the cave. Radon concentrations obtained from the active and passive sampling methods showed that, firstly, the concentrations inside the cave measured by the latter method differed greatly due to high humidity levels up to 88%. The total inside radon exposure dose equivalent people were subjected to was estimated to be 19 µSv a−1 for visitors and 24,065 µSv a−1 for guides. The gamma absorbed dose rates were determined for inside and outside the cave. The dose rates were calculated by means of using the 226Ra, 232Th and 40K activity concentrations and by means of real-time measurements. The gamma absorbed dose rates were found to be much higher than the value of 55 nGy h−1 given by UNSCEAR. In addition, the mineralogical compositions and elemental analyses of samples taken from the cave were determined by XRD and WD-XRF methods.

中文翻译：

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洞穴大气中主动和被动氡测量的比较，以及氡暴露剂量当量和伽马吸收剂量率的估计

摘要氡 (222Rn) 测量是在 Pileki Cave 中使用 Radim 3A 有源氡监测设备进行的。CR-39 核径迹探测器的被动采样方法也进行了测量，方法是将它们暴露在洞穴中三个月。通过主动和被动采样方法获得的氡浓度表明，首先，由于高达 88% 的高湿度水平，后一种方法测量的洞穴内浓度差异很大。据估计，游客接受的内部氡暴露总剂量为 19 µSv a-1，导游为 24,065 µSv a-1。确定了洞穴内外的伽马吸收剂量率。剂量率是通过使用 226Ra、232Th 和 40K 活性浓度并通过实时测量来计算的。发现伽马吸收剂量率远高于 UNSCEAR 给出的 55 nGy h-1 值。此外，通过 XRD 和 WD-XRF 方法确定了从洞穴中采集的样品的矿物组成和元素分析。