Chalupnik Stanislaw
Silesian Centre for Environmental Radioactivity, Central Mining Institute, Katowice, Poland.
J Radiol Prot. 2020 Nov 20;40(4). doi: 10.1088/1361-6498/abae0e.
Radon has been identified as one of the most important hazards, causing lung cancer. The most important isotope of radon isRn (3.83 d), while thoronRn (55 s) is treated as the less important isotope due to its short half-life. The radon/thoron hazard for people is related to inhalation of their decay products, but usually, only measurements of radon gas are done in dwellings. For such a purpose nuclear track detectors are used in most of the cases. Since several years simultaneous measurements are done to estimate thoron contribution to indoor radon and thoron exposure with the use of track detectors, too. Typically, a set of two detectors are applied and thoron concentrations are calculated on the basis of discriminative calculations. Unfortunately, very often results of these surveys are not accurate due to underestimation of the lower limit of detection (LLD) for thoron in the presence of elevated radon concentrations. Therefore an analysis of thoron LLDs in relationship to radon concentrations is presented.
氡已被确认为最重要的危害因素之一，可导致肺癌。氡最重要的同位素是Rn（半衰期为3.83天），而钍射气Rn（半衰期为55秒）因其半衰期短而被视为不太重要的同位素。氡/钍射气对人体的危害与吸入它们的衰变产物有关，但通常在住宅中仅对氡气进行测量。为此，大多数情况下会使用核径迹探测器。多年来，也一直在同时进行测量，以利用径迹探测器估算钍射气对室内氡和钍射气暴露的贡献。通常会应用一组两个探测器，并根据判别计算来计算钍射气浓度。不幸的是，由于在氡浓度升高的情况下低估了钍射气的探测下限（LLD），这些调查的结果往往不准确。因此，本文对钍射气探测下限与氡浓度的关系进行了分析。
