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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Use of three new SSNTD methods for evaluating thorium contents in different building materials and measuring thoron and its progeny concentrations inside dwellings.
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Use of three new SSNTD methods for evaluating thorium contents in different building materials and measuring thoron and its progeny concentrations inside dwellings.

机译：使用三种新的SSNTD方法评估不同建筑材料中的th含量，并测量住宅内的ron及其子代浓度。

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摘要

Three new methods based on using CR-39 and LR- 115 type II solid state nuclear track detectors (SSNTD) were used for measuring thorium concentrations (in 10(-6)g/g (ppm)) inside different building materials and evaluating the resulting concentrations of thoron and its progenies in dwellings built by the studied materials. The first technique consists of determining the probabilities for alpha-particles emitted by the uranium and thorium series inside the building materials or by the radon and thoron groups inside the dwelling atmosphere to reach and be registered as tracks on the SSNTD utilized and exploiting the resulting track density rates. The second method consists of evaluating the mean critical angles of etching of the CR-39 and LR-115 II SSNTD and measuring the resulting track densities registered on the detectors utilized. The third technique is based on calculating the detection efficiencies of the CR-39 and LR-115 II SSNTD for a-particles emitted by the uranium and thorium series in the building materials or by the radon and thoron groups in air and measuring track density rates registered on these detectors. The influence of the building material's nature and ventilation rate on the thoron and its decay products inside the dwelling rooms studied has been investigated.
机译：基于CR-39和LR-115 II型固态核径迹检测器（SSNTD）的三种新方法用于测量不同建筑材料中的or浓度（以10（-6）g / g（ppm）表示）并评估所研究材料建造的房屋中所产生的concentrations及其子代浓度。第一项技术包括确定建筑材料内部的铀和th系列或居住环境中的the和族群发射的α粒子到达并记录为所使用的SSNTD上的轨道的概率，并利用所产生的轨道密度率。第二种方法包括评估CR-39和LR-115 II SSNTD的平均蚀刻临界角，并测量所使用的检测器上记录的最终磁道密度。第三种技术基于计算CR-39和LR-115 II SSNTD对建筑材料中的铀和or系列或空气中的and和tho族发射的a粒子的检测效率并测量轨道密度速率在这些探测器上注册。研究了建筑材料的性质和通风速率对所研究的居住室内的ron及其腐烂产物的影响。

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