驻极体离子室高灵敏度氡监测参数研究

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2024-12-31 DOI:10.1016/j.radphyschem.2024.112498

Sahel Rabiee , Mehdi Sohrabi , Hossein Afarideh

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引用次数: 0

摘要

驻极体离子室（EIC）是一种被动集成离子室，广泛应用于室内和室外氡监测。EIC由导电腔内的一层薄薄的带电聚四氟乙烯（PTFE）驻极体膜组成。聚四氟乙烯驻极体薄膜提供了一个能够收集离子的准永久电场，并作为定量传感器。氡气通过嵌入的过滤区域扩散到EIC中，氡及其衰变产物释放的α粒子电离腔内的空气。离子通过相反符号的驻极体膜收集导致表面电位降低，与氡暴露、暴露持续时间和EIC灵敏度成正比。为了适应氡监测的不同要求，通过采用不同厚度的聚四氟乙烯驻极体薄膜，设计、建造和研究了不同体积（210、500和1000 cm3）的eic。发现EIC的灵敏度取决于EIC的体积、厚度、面积和PTFE驻极体膜的极性。因此，通过考虑这些参数，可以开发出eic，以满足短期、中期和长期室内和室外氡监测应用的灵敏度要求。

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Electret ion chamber parametric studies for high sensitivity radon monitoring

An electret ion chamber (EIC) is a passive integrated ion chamber that has been widely used for indoor and outdoor radon monitoring. The EIC consists of a thin layer of charged Polytetrafluoroethylene (PTFE) electret film inside an electrically conductive chamber. The PTFE electret film provides a quasi-permanent electric field capable of collecting ions and acts as a quantitative sensor. Radon gas diffuses into the EIC through the embedded filtered areas, and alpha particles emitted from radon and its decay products ionize the air inside the chamber. The collection of ions via an electret film of opposite signs results in a surface potential reduction proportional to the radon exposure, exposure duration, and EIC sensitivity. To accommodate the differing requirements for radon monitoring, EICs of different volumes (210, 500, and 1000 cm³) have been designed, constructed and studied by employing PTFE electret films of varying thicknesses. The sensitivity of EICs was found to be dependent on the EIC volume, thickness, area, and polarity of PTFE electret film. So, by considering such parameters, EICs can be developed to meet the sensitivity requirements for short-, mid-, and long-term indoor and outdoor radon monitoring applications.

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.