Radon progeny: Behaviour and influencing factors in indoor and outdoor environment

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Applied Radiation and Isotopes Pub Date : 2025-02-28 DOI:10.1016/j.apradiso.2025.111760

Rosaline Mishra , R.P. Rout , R. Prajith , Jalaluddin S , A. Khan , B.K. Sapra

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Abstract

Radon progeny are the major contributor to inhalation dose to humans from natural sources of radiation. In addition, they are also used as tracers to study atmospheric phenomena. This makes it important to study the behaviour of Radon Progeny in both indoor and outdoor environment. In the present study, the progeny concentration, Radon gas concentration, unattached fraction are continuously measured for a period of 1 year in a ground floor room in Mumbai, both indoor and outdoor. The hourly average data for all months gave a clear picture of the diurnal and seasonal variation in progeny activity concentrations, unattached fractions and equilibrium factor in both environments. Average progeny concentration in the indoors was measured as ∼2–3 times higher that in the outdoors. The progeny activity in the outdoor environment was minimum in the rainy season (3.6 ± 1.2 Bq m⁻³), whereas that in indoors was minimum in summer season (7.5 ± 2.9 Bq m⁻³). Equilibrium factor in the indoor was obtained as V-shaped behavior with a minima in the afternoon, which was contrary to the inverted V-shaped measured in the outdoors. The night-time and day time variations highlight the influencing factors, like temperature, humidity, rainfall and turbulence.

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氡子体：室内外环境的行为及其影响因素

氡子体是自然辐射源对人类吸入剂量的主要贡献者。此外，它们还被用作研究大气现象的示踪剂。因此，研究氡子体在室内和室外环境中的行为具有重要意义。在本研究中，子代浓度、氡气浓度、未附著分数在孟买的一层室内和室外连续测量了1年。所有月份的每小时平均数据清楚地显示了两种环境中子代活动浓度、未附着分数和平衡因子的日变化和季节变化。在室内测得的平均子代浓度是室外的2-3倍。雨季室外环境子代活动最小（3.6±1.2 Bq m−3），夏季室内环境子代活动最小（7.5±2.9 Bq m−3）。室内的平衡因子表现为v型，在下午达到最小值，与室外的倒v型相反。夜间和白天的变化突出了影响因素，如温度、湿度、降雨和湍流。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. 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. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.

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