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Journal articles on the topic '222Rn Concentration'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Wang, Nanping, Ling Zheng, Xingming Chu, Shijun Li, and Shouliang Yan. "The characteristics of radon and thoron concentration from soil gas in Shenzhen City of Southern China." Nukleonika 61, no. 3 (2016): 315–19. http://dx.doi.org/10.1515/nuka-2016-0052.

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Abstract Radon (222Rn) and thoron (220Rn) from soil gas are very significant factors that can affect the indoor radon level in the first floor or in the basement. China is one of the countries with the highest thorium content in the world. Therefore, it is very significant to study 222Rn/220Rn concentration in the soil in Shenzhen City (SC). A 222Rn/220Rn survey was performed using a portable radon monitor (model RAD7) at 69 sites, covered a total area of 1800 km2 in 2013 to get the original data for radon risk estimation in SC. The average values of 222Rn and 220Rn concentration of soil gas o
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Sharma, S., A. Kumar, R. Mehra, and R. Mishra. "ASSESSMENT OF DOSE DUE TO AMBIENT Rn222/Rn220 PROGENY IN DIFFERENT DWELLINGS OF JAMMU AND KASHMIR STATE, INDIA." Radiation Protection Dosimetry 188, no. 2 (2019): 162–73. http://dx.doi.org/10.1093/rpd/ncz271.

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Abstract The un-attached part of radon (222Rn) progeny is one of the imperative variables for the definitive evaluation of the effective dose from the radon exposure perspective, and it might fluctuate enormously in various ecological conditions. Therefore, estimate dispersion of 222Rn/220Rn progeny, un-attached part and aerosol concentration was estimated in an indoor domain of Jammu and Kashmir State, India utilizing progeny deposition based sensors. Distinctive sorts of residence were picked up for this exploratory examination and maximum 222Rn and thoron (220Rn) descendants concentration w
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3

Odongo, Willis Otieno Gor, Margaret Chege, Shinji Tokonami, Nadir Hashim, Chutima Kranrod, and Catherine Nyambura. "RADON AND THORON EXHALATION RATES FROM EARTHEN BUILDING MATERIALS USED IN HIGH BACKGROUND RADIATION AREAS OF HOMA AND RURI, KENYA." Radiation Protection Dosimetry 197, no. 1 (2021): 12–18. http://dx.doi.org/10.1093/rpd/ncab156.

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Abstract 222Rn and 220Rn surface exhalation rates from earthen building materials used in high background radiation areas of Homa and Ruri, Kenya have been measured using an accumulation chamber coupled with RAD7 detector. Activity concentrations of 226Ra and 232Th in the building materials were determined by γ-ray spectroscopy. In Homa the average 222Rn surface exhalation was 1 ± 0.1 mBqm−2 s−1, while that of 220Rn was 18 ± 2 Bqm−2 s−1; in Ruri 222Rn was 0.9 ± 0.1 mBqm−2 s−1 and 220Rn was 25 ± 3 Bqm−2 s−1. 222Rn was 26 times lower than world average and 220Rn was higher by a factor of 21. Ave
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4

Kowalska, Agata, Elżbieta Domin, and Tadeusz A. Przylibski. "Pilot study of 222Rn and 226Ra activity concentrations in groundwaters of Roztocze region, Poland." E3S Web of Conferences 44 (2018): 00077. http://dx.doi.org/10.1051/e3sconf/20184400077.

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Authors selected 5 intakes of groundwaters outflowing from carbonate rocks in Roztocze region in Poland and measured activity concentrations of 222Rn and 222Ra. The average values of 222Rn and 226Ra activity concentrations were: 5.3 (min. 2.0, max. 8.3 Bq/dm3) and 0.06 Bq/dm3 (from <0.06 to 0.07 Bq/dm3) respectively. To make a comparison authors made also investigations in groundwaters from other regions built of carbonate rocks in Poland (Sudetes, Kraków-Częstochowa Upland, Lublin Upland, Tatra Mountains). In groundwaters from these regions, 222Rn activity concentration was from 2.2 to 47.
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Dosh, Rukia Jabar, Qusay Bassim Muhamad, and Ali Abid Abojassim. "Dose assessment for radon and thoron concentrations in iraqi thermostone bricks." E3S Web of Conferences 452 (2023): 06029. http://dx.doi.org/10.1051/e3sconf/202345206029.

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This research aims to measure radon (222Rn) and thoron (220Rn) concentrations for selected thermostone bricks samples produced in Iraq. 222Rn and 220Rn concentrations were measured using the active method (RAD7 detector). Also, the inhalation dose for the year was calculated using the 222Rn and 220Rn concentrations. The results of this study indicated that the range of radon concentration values was between 8.00 Bq/m3 to 66.50 Bq/m3; its mean value was 28.22±3.89 Bq/m3. At the same time, the values of thoron concentrations ranged from 27.10 Bq/m3 to 129.00 Bq/m3, with a mean value of 55.46±7.1
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Mehra, Rohit, Rajan Jakhu, and HM Mittal. "Assessment of lung dose from indoor 222Rn and 220Rn exposure in the Jalandhar and Kapurthala districts of Punjab, India." Indoor and Built Environment 26, no. 9 (2015): 1305–10. http://dx.doi.org/10.1177/1420326x15613559.

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Radon (222Rn) and its progenies are the main source of the inhalation dose received by humans due to natural radioactivity. Residential houses of different villages of Jalandhar and Kapurthala districts of Punjab, India, were chosen for the present study. An attempt has been made to estimate the dose to lung (DRL) due to indoor 222Rn concentration. The results of observed values of dose rate to lung ( Dlung), dose to tracheo-bronchial region ( DT-B), dose to pulmonary + pulmonary lymph region ( DP+PL), dose to lung ( DRL) from 222Rn exposure and dose to lung ( DTL) from indoor Thoron (220Rn) e
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7

Sivakumar, R. "Variability of radon and thoron concentration with type of dwellings in a hilly area." Indoor and Built Environment 27, no. 1 (2016): 96–108. http://dx.doi.org/10.1177/1420326x16663811.

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Indoor radon, thoron and progenies are major contributors to the indoor radiation dose which have been measured by our study for different types of dwellings during four seasons of a year. The indoor radon, thoron and progeny levels observed in the present study found to vary with seasons of a year. The average highest radon, thoron and progeny were observed during winter and the corresponding lowest values were observed during summer. The highest 222Rn, 220Rn and progenies concentrations were observed in mud houses and the lowest values were recorded in wooden houses. A good correlation with
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8

Lucchetti, Carlo, Mauro Castelluccio, Matteo Altamore, et al. "Using a scale model room to assess the contribution of building material of volcanic origin to indoor radon." Nukleonika 65, no. 2 (2020): 71–76. http://dx.doi.org/10.2478/nuka-2020-0010.

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AbstractIn the frame of Radon rEal time monitoring System and Proactive Indoor Remediation (RESPIRE), a LIFE 2016 project funded by the European Commission, the contribution of building materials of volcanic origin to indoor radon concentration was investigated. First, total gamma radiation and related outdoor dose rates of geological materials in the Caprarola area (Central Italy) were measured to define main sources of radiation. Second, 222Rn and 220Rn exhalation rates of these rocks used as building materials were measured using an accumulation chamber connected in a closed loop with a RAD
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9

Abdul Razab, Mohammad Khairul Azhar, Siti Fatimah Abd Karim, Nur Ezati Azhar, et al. "The Effects of Altitude Levels on 222Rn Concentration in Academic Building at Universiti Malaysia Kelantan Jeli Campus." Materials Science Forum 888 (March 2017): 466–70. http://dx.doi.org/10.4028/www.scientific.net/msf.888.466.

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Highly continuous exposure to Radon (222Rn) concentrations can affects human health and cause lung cancer. This study aims to briefly monitor 222Rn concentration at different level altitude and to investigate correlation between their environmental parameters sort of temperature, humidity and pressure in indoor space. Lecture rooms known as BK 4 in the first floor and BK 8 in the third floor at academic building Universiti Malaysia Kelantan (UMK) Jeli Campus were selected as the study areas. The total of 210 readings indoor 222Rn concentrations data have been collected for the whole study usin
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10

Ouzounis, Athanasios, and Ioannis Kaissas. "A Review of Methodologies for Measuring Geogenic Rn Exhalation." HNPS Advances in Nuclear Physics 31 (June 2, 2025): 90–95. https://doi.org/10.12681/hnpsanp.8157.

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Radon (222Rn) and thoron (220Rn) are potential health hazards and therefore their concentration levels have been extensively monitored indoors across Europe resulting in indoor radon concentration maps [1]. Direct in situ measurements of geogenic radon and thoron exhalation are limited to a few locations worldwide while indoor measurements are more common. Potentially hazardous zones for long-term inhabitancy can be characterized, considering spatial geogenic radon exhalation data acquired before any construction activities. Furthermore, atmospheric simulations, earthquake prediction and ident
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11

Hu, Jun, Chutima Kranrod, Yasutaka Omori, Masahiro Hosoda, and Shinji Tokonami. "Radiation dose estimation for indoor radon, thoron and their progenies using a stochastic method—a small-scale survey in Wuhan, China." Radiation Protection Dosimetry 200, no. 16-18 (2024): 1720–25. http://dx.doi.org/10.1093/rpd/ncae012.

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Abstract Passive radon monitors with CR-39s are widely used in major epidemiological surveys. However, the conventional CR-39 track density determining strategy makes it difficult to accurately estimate the concentration because of the heterogeneity of tracks on CR-39s. This study introduced a stochastic method, Latin hypercube sampling, to improve the track density determining strategy and provide the probability distribution of 222Rn concentration and equilibrium equivalent thoron concentration. The first 222Rn and 220Rn discriminated survey was conducted in Wuhan, China, in 2018 using RADUE
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12

Abdul Razab, Mohammad Khairul Azhar, Nur Liyana Hamzah, Siti Fatimah Abd Karim, et al. "Determination of Indoor 222Rn Concentrations Level on Different Room Sizes in Academic Building at Universiti Malaysia Kelantan Jeli Campus." Materials Science Forum 888 (March 2017): 447–52. http://dx.doi.org/10.4028/www.scientific.net/msf.888.447.

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The objectives of this study are to briefly monitor the 222Rn concentration in selected study area and to investigate its correlation with the environmental factors (pressure, humidity and temperature). 222Rn concentrations were monitored in three different sizes of lecture rooms known as BK 6, BK 7 and BK 8 at academic building, Universiti Malaysia Kelantan (UMK) Jeli Campus. Radon monitor known as Sentinel 1030 has been used to collect 210 readings of 222Rn concentration data. Environmental factors for each study areas was analyzed by using Pearson correlation. The average 222Rn concentratio
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13

Hu, Jun, Masahiro Hosoda, and Shinji Tokonami. "Parameter sensitivity analysis of the theoretical model of a CR-39-based direct 222Rn/220Rn progeny monitor." Nukleonika 65, no. 2 (2020): 95–98. http://dx.doi.org/10.2478/nuka-2020-0014.

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AbstractThe deposition-based direct indoor 222Rn and 220Rn progeny measurement techniques are mostly affected by the indoor environmental conditions, such as the ventilation, concentration of condensation nuclei, and reactions with the structure and its furnishings. In this study, a theoretical model of a direct 222Rn and 220Rn progeny monitor based on allyl diglycol carbonate (ADC or CR-39) was established to analyse the factors that influence the detection process by using the parameter sensitivity analysis. The aerosol parameters contributed the highest to the variance, followed by the aero
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14

Sanada, Tetsuya. "Measurement of Indoor Thoron Gas Concentrations Using a Radon-Thoron Discriminative Passive Type Monitor: Nationwide Survey in Japan." International Journal of Environmental Research and Public Health 18, no. 3 (2021): 1299. http://dx.doi.org/10.3390/ijerph18031299.

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As part of a nationwide survey of thoron (220Rn) in Japan, the indoor 220Rn gas concentrations in 940 dwellings were measured throughout one year, from 1993 to 1996, using a passive type 222Rn-220Rn discriminative monitor. The monitor was placed in a bedroom or a living room in each house for four successive three-month periods. The mean annual indoor 220Rn concentration was estimated from the four measurements in each house. The arithmetic mean, the median and the geometric mean for indoor 220Rn concentrations in 899 dwellings were 20.1, 9.6 and 10.0 Bq m−3, respectively. The 220Rn concentrat
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15

Hernández-Ceballos, Miguel Ángel, Natalia Alegría, Igor Peñalva, et al. "Meteorological Approach in the Identification of Local and Remote Potential Sources of Radon: An Example in Northern Iberian Peninsula." International Journal of Environmental Research and Public Health 20, no. 2 (2023): 917. http://dx.doi.org/10.3390/ijerph20020917.

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This paper presents a meteorological approach to identify local and remote sources driving the variability of surface daily radon concentrations. To this purpose, hourly 222Rn concentration and surface meteorological measurements, and air mass trajectories at Bilbao station (northern Iberian Peninsula) during the period 2017–2018 have been taken as reference. To investigate the potential transport pathways and potential 222Rn sources, the backward trajectory cluster analysis, trajectory sector analysis (TSA), and potential source contribution function (PSCF) are applied. On average, the diurna
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Xia, Y., H. Sartorius, C. Schlosser, U. Stöhlker, F. Conen, and W. Zahorowski. "Comparison of one- and two-filter detectors for atmospheric <sup>222</sup>Rn measurements under various meteorological conditions." Atmospheric Measurement Techniques 3, no. 3 (2010): 723–31. http://dx.doi.org/10.5194/amt-3-723-2010.

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Abstract. Parallel monitoring of 222Rn and its short-lived progeny (218Po and 214Pb) were carried out from November 2007 to April 2008 close to the top of the Schauinsland mountain, partly covered with forest, in South-West Germany. Samples were aspired from the same location at 2.5 m above ground level. We measured 222Rn with a dual flow loop, two-filter detector and its short-lived progeny with a one-filter detector. A reference sector for events, facing a steep valley and dominated by pasture, was used to minimize differences between 222Rn and progeny-derived 222Rn activity concentrations.
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Xia, Y., H. Sartorius, C. Schlosser, U. Stöhlker, F. Conen, and W. Zahorowski. "Comparison of one- and two-filter detectors for atmospheric 222Rn measurements." Atmospheric Measurement Techniques Discussions 3, no. 1 (2010): 675–95. http://dx.doi.org/10.5194/amtd-3-675-2010.

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Abstract. Parallel monitoring of 222Rn and its short-lived progeny (218Po and 214Pb) were carried out from November 2007 to April 2008 close to the top of the Schauinsland mountain, partly covered with forest, in South-West Germany. Samples were aspired from the same location at 2.5 m above ground level. We measured 222Rn with a dual flow loop, two-filter detector and its short-lived progeny with a one-filter detector. A reference sector for events, facing a steep valley and dominated by pasture, was used to minimize differences between 222Rn and progeny-derived 222Rn activity concentrations.
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18

Sueli da Conceição Teixeira Coelho, T. O. Santos, L. C. Takahashi, I. N. S. Ferreira, and R. G. Passos. "Assessment of Natural Radioactivity in a Residence in Belo Horizonte." Brazilian Journal of Radiation Sciences 12, no. 4A (Suppl.) (2025): e2731. https://doi.org/10.15392/2319-0612.2024.2731.

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Natural radioactivity comes from natural radionuclides present in rocks and soil and from cosmic rays. In addition to gamma-emitting radionuclides, radon stands out, which is a carcinogenic gas. In nature, radon occurs as radioisotopes: 222Rn (half-life time, t1/2,of 3.83 d), 219Rn (t1/2 = 3.92 s) and 220Rn (or thoron, t1/2 = 54.5 s). The World Health Organization (OMS) recommends that it be measured in homes, with the recommended limit being 100 Bq/m3 and the maximum limit being 300 Bq/m3. This work evaluates the origin of natural radiation in a residence in Belo Horizonte, Minas Gerais, Braz
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Pla, Concepcion, Angel Fernandez-Cortes, Soledad Cuezva, et al. "Insights on Climate-Driven Fluctuations of Cave 222Rn and CO2 Concentrations Using Statistical and Wavelet Analyses." Geofluids 2020 (June 27, 2020): 1–17. http://dx.doi.org/10.1155/2020/8858295.

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Understanding the fluctuations in cave air concentrations and their climatic control is substantial not only to preserve the quality of indoor atmospheres but also to avoid the risk related to the presence of hazardous substances. In this study, we investigated the most influential factors affecting 222Rn and CO2 concentrations, the nature of their dynamics, and their coupling with climatic variations. For this purpose, we combined a set of mathematical methods that included a statistical and wavelet analysis of a 6-year time series in Rull Cave (Spain). Generally, the 222Rn and CO2 dynamic in
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Dovjak, Mateja, Ožbej Vene, and Janja Vaupotič. "Analysis of Ventilation Efficiency as Simultaneous Control of Radon and Carbon Dioxide Levels in Indoor Air Applying Transient Modelling." International Journal of Environmental Research and Public Health 19, no. 4 (2022): 2125. http://dx.doi.org/10.3390/ijerph19042125.

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The impact of ventilation efficiency on radon (222Rn) and carbon dioxide (CO2) concentrations in the indoor air of a residential building was studied by applying transient data analysis within the CONTAM 3.4 program. Continuous measurements of 222Rn and CO2 concentrations, together with basic meteorological parameters, were carried out in an apartment (floor area about 27 m2) located in Ljubljana, Slovenia. Throughout the experiment (October 3–15), frequent ventilation (several times per day), poor ventilation (once to twice per day) and no ventilation scenarios were applied, and the exact ven
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Saleh, Muneer Aziz, Syed Nurhaizam Syed Othman, Khaidzir Hamzah, and Jasman Zainal. "Vertical distribution of the radon concentration at Batu Pahat district, Johor, Malaysia." Malaysian Journal of Fundamental and Applied Sciences 16, no. 3 (2020): 324–27. http://dx.doi.org/10.11113/mjfas.v16n3.1680.

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This study investigated the vertical distribution of radon, 222Rn concentrations in soil gas for different soil types and found the relation between the measured gamma dose rates and radon concentrations. The 222Rn concentrations in soil gas were measured at depth of 20 cm, 60 cm, 80 cm and 100 cm using semiconductor detector (RAD7) coupled with soil gas probe. The overall activity concentrations of 222Rnin soil were ranged from Minimum Detectable Activity (MDA)to 54000 ± 3000 Bq m−3 in Batu Pahat District. The results showed that the overall highest concentration of 222Rn was recorded at 40 c
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Berezina, E. V., N. F. Elansky, K. B. Moiseenko, et al. "Estimation of nocturnal <sup>222</sup>Rn soil fluxes over Russia from TROICA measurements." Atmospheric Chemistry and Physics Discussions 13, no. 6 (2013): 14545–79. http://dx.doi.org/10.5194/acpd-13-14545-2013.

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Abstract. In TROICA (TRanscontinental Observations Into the Chemistry of the Atmosphere) experiments (1999–2008) simultaneous observations of near surface 222Rn concentrations and atmospheric boundary layer thermal structure were performed across North Eurasia including the central part of Russia, South Siberia and the Far East. The data on 222Rn and temperature vertical distribution are used to estimate regional scale 222Rn soil fluxes basing on calculations of nocturnal 222Rn accumulation rates in the surface layer under inversion conditions. An effect of seasonal soil thawing on 2–4 times s
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Zhang, Bo, Hongyu Liu, James H. Crawford, et al. "Simulation of radon-222 with the GEOS-Chem global model: emissions, seasonality, and convective transport." Atmospheric Chemistry and Physics 21, no. 3 (2021): 1861–87. http://dx.doi.org/10.5194/acp-21-1861-2021.

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Abstract. Radon-222 (222Rn) is a short-lived radioactive gas naturally emitted from land surfaces and has long been used to assess convective transport in atmospheric models. In this study, we simulate 222Rn using the GEOS-Chem chemical transport model to improve our understanding of 222Rn emissions and surface concentration seasonality and characterize convective transport associated with two Goddard Earth Observing System (GEOS) meteorological products, the Modern-Era Retrospective analysis for Research and Applications (MERRA) and GEOS Forward Processing (GEOS-FP). We evaluate four global 2
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Tomarchio, Elio. "An experimental search for a correlation between outdoor 222Rn concentration and 210Pb activity in air particulate samples." Nuclear Technology and Radiation Protection 33, no. 1 (2018): 112–16. http://dx.doi.org/10.2298/ntrp1801112t.

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This work was aimed to search for a correlation between outdoor 222Rn air concentration and 210Pb activity in particulate samples collected on a filter. The existence of a correlation could support the hypothesis that both 222Rn and its long-lived product 210Pb are embedded into the same air masses and undergo the same air transport phenomena. Lead-210 activity was determined by means of gamma ray spectrometric measurement carried out a few days after the sampling whereas 222Rn concentration was measured through a commercial monitor. Experimental tests allowed to obtain a weak correlation betw
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Zimnoch, M., P. Wach, L. Chmura, et al. "Factors controlling temporal variability of near-ground atmospheric <sup>222</sup>Rn concentration over central Europe." Atmospheric Chemistry and Physics 14, no. 18 (2014): 9567–81. http://dx.doi.org/10.5194/acp-14-9567-2014.

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Abstract. Concentration of radon (222Rn) in the near-ground atmosphere has been measured quasi-continuously from January 2005 to December 2009 at two continental sites in Europe: Heidelberg (south-west Germany) and Krakow (southern Poland). The atmosphere was sampled at ca. 30 and 20 m above the local ground. Both stations were equipped with identical instruments. Regular observations of 222Rn were supplemented by measurements of surface fluxes of this gas in the Krakow urban area, using two different approaches. The measured concentrations of 222Rn varied at both sites in a wide range, from l
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Vinuesa, J. F., and S. Galmarini. "Characterization of the <sup>222</sup>Rn family turbulent transport in the convective atmospheric boundary layer." Atmospheric Chemistry and Physics Discussions 6, no. 5 (2006): 8917–60. http://dx.doi.org/10.5194/acpd-6-8917-2006.

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Abstract. The combined effect of turbulent transport and radioactive decay on the distribution of 222Rn and its progeny in convective atmospheric boundary layers (CBL) is investigated. Large eddy simulation is used to simulate their dispersion in steady state CBL and in unsteady conditions represented by the growth of a CBL within a pre-existing reservoir layer. The exact decomposition of the concentration and flux budget equations under steady state conditions allowed us to determine which processes are responsible for the vertical distribution of 222Rn and its progeny. Their mean concentrati
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Vinuesa, J. F., and S. Galmarini. "Characterization of the <sup>222</sup>Rn family turbulent transport in the convective atmospheric boundary layer." Atmospheric Chemistry and Physics 7, no. 3 (2007): 697–712. http://dx.doi.org/10.5194/acp-7-697-2007.

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Abstract. The combined effect of turbulent transport and radioactive decay on the distribution of 222Rn and its progeny in convective atmospheric boundary layers (CBL) is investigated. Large eddy simulation is used to simulate their dispersion in steady state CBL and in unsteady conditions represented by the growth of a CBL within a pre-existing reservoir layer. The exact decomposition of the concentration and flux budget equations under steady state conditions allowed us to determine which processes are responsible for the vertical distribution of 222Rn and its progeny. Their mean concentrati
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Pujiindiyati, Evarista Ristin, and Bungkus Pratikno. "Environmental Isotope of Radon-222 for Ciliwung River and Shallow Deep Water Interaction Study." Jurnal ILMU DASAR 21, no. 2 (2020): 139. http://dx.doi.org/10.19184/jid.v21i2.11940.

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Aquifer in river bank area is mostly susceptive toward pollution occurring in river. One of parameters to determine the interaction process between groundwater and river is a natural isotope of 222Rn. The significant difference of radon concentration in groundwater and river water can be utilized as a scientific basis for investigating groundwater infiltration in river bank. Those studied parameters are residence time and infiltration rate. The research using 222Rn had been conducted in shallow groundwater of Ciliwung river bank - South Jakarta during rainy and dry season. The range of 222Rn c
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Fojtík, P., J. Hůlka, P. Bartl, et al. "RADON INHALATION EXPERIMENTS TO TEST RADON EXHALATION KINETICS." Radiation Protection Dosimetry 191, no. 2 (2020): 176–80. http://dx.doi.org/10.1093/rpd/ncaa144.

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Abstract Three experiments were conducted with a volunteer to test the kinetics of the 222Rn exhalation after a short­time exposure to an elevated 222Rn air concentration. Radon concentration in an exhaled air was measured, complemented by whole body counting of 222Rn decay products in a body. Exhaled activities are compared with the prediction of the recent ICRP biokinetic model for radon. While a rapid equilibration of the exhaled radon activity concentration with that in the air inhaled corresponded with the model, the measured 222Rn exhalation rate was significantly less than modelled. Fiv
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Fijałkowska-Lichwa, L., and T. A. Przylibski. "Short-term <sup>222</sup>Rn activity concentration changes in underground spaces with limited air exchange with the atmosphere." Natural Hazards and Earth System Sciences 11, no. 4 (2011): 1179–88. http://dx.doi.org/10.5194/nhess-11-1179-2011.

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Abstract. The authors investigated short-time changes in 222Rn activity concentration occurring yearly in two underground tourist facilities with limited air exchange with the atmosphere. One of them is Niedźwiedzia (Bear) Cave in Kletno, Poland – a natural space equipped with locks ensuring isolation from the atmosphere. The other site is Fluorite Adit in Kletno, a section of a disused uranium mine. This adit is equipped with a mechanical ventilation system, operated periodically outside the opening times (at night). Both sites are situated within the same metamorphic rock complex, at similar
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Shahzad, M. I., G. Sher, S. Manzoor, et al. "MEASUREMENT OF RADON (222Rn) CONCENTRATION AT HIGH ALTITUDES IN THE NORTHERN AREAS OF PAKISTAN." Nucleus 46, no. 1-2 (2020): 15–20. https://doi.org/10.71330/nucleus.46.01-2.971.

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Radon (222Rn) concentration has been measured using CN-85 solid-state nuclear track detectors in the dwellings of Northern Areas of Pakistan at different altitudes. The CN-85 detectors, installed in box type radon dosimeters, were exposed for a period of one year. The average radon concentration level has been found at altitudes 3020 m, 3540 m, 3665 m and 4265 m above sea level and the 222Rn concentrations were found to be (16.4±2.5) Bq m-3, (21.7±4.8) Bq m-3, (13.8±3.2) Bq m-3 and (19.3±3.4) Bq m-3, respectively. It has been observed that there are no significant differences in the radon
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Bem, Henryk, Magdalena Długosz-Lisiecka, Daria Mazurek-Rudnicka, and Piotr Szajerski. "Occurrence of 222Rn and 226,228Ra in underground water and 222Rn in soil and their mutual correlations for underground water supplies in southern Greater Poland." Environmental Geochemistry and Health 43, no. 8 (2021): 3099–114. http://dx.doi.org/10.1007/s10653-020-00792-z.

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AbstractEuropean Union Council Directive 2013/51/EURATOM recently sets out so-called indicator parameters for: radon, tritium and indicative dose of water intended for human consumption. The aim of this research was to elaborate an effective procedure for determination of radon and radium 226,228Ra isotopes (which are potentially the main contributors to the internal dose from drinking and cooking water) and to find the possible relationships between these radionuclides in underground water reservoirs and 222Rn concentration in the soil gas in their vicinity. The research was performed by appl
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33

Koffi, E. N., P. Bergamaschi, U. Karstens, et al. "Evaluation of the boundary layer dynamics of the TM5 model over Europe." Geoscientific Model Development 9, no. 9 (2016): 3137–60. http://dx.doi.org/10.5194/gmd-9-3137-2016.

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Abstract. We evaluate the capability of the global atmospheric transport model TM5 to simulate the boundary layer dynamics and associated variability of trace gases close to the surface, using radon (222Rn). Focusing on the European scale, we compare the boundary layer height (BLH) in the TM5 model with observations from the National Oceanic and Atmospheric Admnistration (NOAA) Integrated Global Radiosonde Archive (IGRA) and also with ceilometer and lidar (light detection and ranging) BLH retrievals at two stations. Furthermore, we compare TM5 simulations of 222Rn activity concentrations, usin
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Zimnoch, M., P. Wach, L. Chmura, et al. "Factors controlling temporal variability of near-ground atmospheric <sup>222</sup>Rn concentration over Central Europe." Atmospheric Chemistry and Physics Discussions 14, no. 3 (2014): 3667–706. http://dx.doi.org/10.5194/acpd-14-3667-2014.

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Abstract. Specific activity of 222Rn in near-ground atmosphere has been measured quasi-continuously from January 2005 to December 2009 at two continental sites in Europe: Heidelberg (south-west Germany) and Krakow (southern Poland). Atmosphere was sampled at ca. 30 m and 20 m, respectively, above the local ground. Both stations were equipped with identical instrumentation. Regular observations of 222Rn were supplemented by measurements of surface fluxes of this gas in Krakow urban area, using two entirely different approaches. Atmospheric 222Rn concentrations varied at both sites in a wide ran
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35

Berezina, E. V., N. F. Elansky, K. B. Moiseenko, et al. "Estimation of nocturnal<sup>222</sup>Rn soil fluxes over Russia from TROICA measurements." Atmospheric Chemistry and Physics 13, no. 23 (2013): 11695–708. http://dx.doi.org/10.5194/acp-13-11695-2013.

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Abstract. In TROICA (TRanscontinental Observations Into the Chemistry of the Atmosphere) campaigns (1999–2008), the simultaneous observations of near surface 222Rn concentrations and atmospheric boundary layer thermal structure were performed along the Trans-Siberian Railway across northern Eurasia from Moscow to Vladivostok, including central, southern and far eastern parts of Russia. The data on 222Rn and temperature vertical distribution are used to estimate 222Rn regional scale soil fluxes based on calculations of nocturnal 222Rn accumulation rates in the surface layer under inversion cond
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36

Wang, Nanping, Miao Hu, Weihua Zeng, Cong Yu, Binlin Jia, and Zhijie Yang. "Indoor and outdoor 222Rn and 220Rn and their progeny levels surrounding Bayan Obo mine, China." Nukleonika 65, no. 2 (2020): 145–48. http://dx.doi.org/10.2478/nuka-2020-0023.

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AbstractMore than half of the total natural ionizing radiation dose received by the human population is caused by radon and thoron (Rn and Tn) and their progeny. To estimate the level of radiation due to radon and thoron and their progeny, an investigation was conducted in a residential area near the world’s largest open-pit mine of Bayan Obo in Inner Mongolia, China. The concentration of Rn, Tn, and their decay products in air and soil were studied by using AlphaGUARD, RAD7, and ERS-RDM-2S for a discrete period of time in three different locations. The average indoor concentration of radon an
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Hu, Jun, Guosheng Yang, Chutima Kranrod, Kazuki Iwaoka, Masahiro Hosoda, and Shinji Tokonami. "An Improved Passive CR-39-Based Direct 222Rn/220Rn Progeny Detector." International Journal of Environmental Research and Public Health 17, no. 22 (2020): 8569. http://dx.doi.org/10.3390/ijerph17228569.

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An improved passive CR-39-based direct 222Rn/220Rn progeny detector with 3 detection channels was designed and tested in this study to measure and calculate equilibrium equivalent concentration (EEC) of both 222Rn and 220Rn without the equilibrium factor. A theoretical model was established to calculate the EEC with optimization. Subsequently, an exposure experiment was carried out to test the performance of this detector, and we compared the chamber experiment and the theoretical model by estimating and measuring various parameters. The deposition flux of progeny derived from the prediction a
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Saidi, Syahrul Affandi, Mohamad Suhaimi Jaafar, Mohammad Khairul Azhar Abdul Razab, et al. "Potential of Fabricated Light Foamed Concrete in Reducing Radon from Building Material." Materials Science Forum 840 (January 2016): 427–31. http://dx.doi.org/10.4028/www.scientific.net/msf.840.427.

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Three of Light Foamed Concrete (LFC) have been obtain by using different formula of Cement:Aggregates. The brick was locate into a closed Perspex box and the net of 222Rn concentration level have been measured for 5 consecutive days. The results show the LFC 3 has produced the lowest of net 222Rn concentration level in air, followed by LFC 2 and LFC 1, respectively. The result also show the 222Rn concentration level have been influenced by the temperature and relative humidity in air.
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Hirao, Shigekazu, Hiromi Yamazawa, and Jun Moriizumi. "Inverse modeling of Asian 222Rn flux using surface air 222Rn concentration." Journal of Environmental Radioactivity 101, no. 11 (2010): 974–84. http://dx.doi.org/10.1016/j.jenvrad.2010.07.004.

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40

Özden, Seli̇n, and Serpi̇l Aközcan Pehli̇vanoğlu. "Measurement of Natural Radioactivity, Indoor Radon and Radiation Hazard Assessment in Kırklareli, Turkey." WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT 21 (July 9, 2025): 847–57. https://doi.org/10.37394/232015.2025.21.70.

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In this study, indoor 222Rn concentrations were evaluated in different selected dwellings in Kırklareli (Turkey) and specific activities of natural radionuclides (226Ra, 232Th, and 40K) were analyzed in the soil samples collected near these dwellings. The indoor 222Rn concentration ranged from 11 ± 1 to 37 ± 3 Bq m−3 . The annual effective doses due to inhalation of 222Rn gas were estimated and vary between 0.28 and 0.93 mSv y −1 . Activity concentrations of 226Ra, 232Th, and 40K range from 19.61 ± 2.91 to 50.54 ± 4.82 Bq kg-1 , 18.66 ± 2.14 to 91.20 ± 8.68 Bq kg-1 , and 97.45 ± 8.96–1354.05 ±
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Dueñas, C., M. C. Fernández, J. Carretero, E. Liger, and M. Pérez. "Release of <sup>222</sup>Rn from some soils." Annales Geophysicae 15, no. 1 (1997): 124–33. http://dx.doi.org/10.1007/s00585-997-0124-0.

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Abstract. Measurements have been made of 222Rn release from diverse soils in the region surrounding Málaga, Spain. These flux measurements were carried out by two methods. A direct method using a static chamber technique and another indirect method obtained from concentration profile measurements of 222Rn in the soil air. The effects of meteorological variables and other parameters on 222Rn flux were studied. The factors that most affected the instantaneous value of 222Rn release were humidity and soil thermal gradient. The directly measured 222Rn fluxes at investigated sites are higher than 2
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Isaev, Volodymyr, Evgen Patrashku, and Iryna Kovaleva. "Mathematical analysis and modelling of reducing radon radiation activity in the building." Ventilation, Illumination and Heat Gas Supply 52 (June 22, 2025): 6–19. https://doi.org/10.32347/2409-2606.2025.52.6-19.

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Analytical dependencies for determining the concentration of Radon 222 (222Rn) in the air of premises for various purposes where gas leaks through leaks or cracks in the building envelope (bomb shelters, basements, semi-basement non-residential and residential premises of the first to third floors of buildings and structures) were obtained. Based on the obtained formulas, it became possible to calculate the change in gas concentration in the investigated space. The developed mathematical model, which uses ANSYS CFD (Computational Fluid Dynamics) simulation, confirmed the results of the calcula
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Prasetio, Rasi, Neneng Laksminingpuri, and Evarista Ristin Pujiindiyati. "Konsentrasi Radon-222 dalam Gas Tanah untuk Deteksi Distribusi Permeabilitas di Daerah Panas Bumi Tampomas, Jawa Barat." EKSPLORIUM 41, no. 1 (2020): 53. http://dx.doi.org/10.17146/eksplorium.2020.41.1.5642.

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ABSTRAK Daerah upflow dalam sistem panas bumi merupakan daerah dengan permeabilitas yang tinggi sebagai lintasan naiknya fluida panas bumi ke permukaan, yang umumnya ditandai dengan adanya fumarol di permukaan. Gunung Tampomas, Jawa Barat, merupakan salah satu lokasi potensi panas bumi yang memiliki manifestasi berupa mata air panas, namun tidak memiliki fumarol atau steam vent. Zona permeabel atau upflow sulit untuk diidentifikasi. Isotop 222Rn merupakan isotop geogenik yang konsentrasinya di dalam gas tanah dapat menunjukkan permeabilitas, baik permeabilitas primer maupun sekunder (struktur)
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44

Liu, Y., Y. P. Zhang, J. C. Liu та ін. "System upgrade for μBq/m3 level 222Rn concentration measurement". Journal of Instrumentation 18, № 03 (2023): T03002. http://dx.doi.org/10.1088/1748-0221/18/03/t03002.

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Abstract The Jiangmen Underground Neutrino Observatory (JUNO), a 20 kton multipurpose underground liquid scintillator detector, was proposed for the determination of the neutrino mass hierarchy as primary physics goal. The central detector will be submerged in a water Cherenkov detector to lower the background from the environment and cosmic muons. Radon is one of the primary background sources. Nitrogen will be used in several sub-systems, and a highly sensitive radon detector has to be developed to measure its radon concentration. A system has been developed based on 222Rn enrichment of acti
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Christofides, Stelios, and George Christodoulides. "Airborne 222Rn Concentration in Cypriot Houses." Health Physics 64, no. 4 (1993): 392–96. http://dx.doi.org/10.1097/00004032-199304000-00006.

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PRZYLIBSKI, Tadeusz A., Elżbieta DOMIN, Joanna GORECKA, and Agata KOWALSKA. "222Rn Concentration in Groundwaters Circulating in Granitoid Massifs of Poland." Water 12, no. 3 (2020): 748. http://dx.doi.org/10.3390/w12030748.

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The authors’ research has shown that the maximum values of 222Rn activity concentration in all granitoid massifs of Poland exceed 100 Bq·L−1, i.e. the value allowed for waters intended for human consumption. Such waters should be de-radoned prior to being distributed through the water supply networks. Even more common in these areas is the occurrence of potentially medicinal radon waters, i.e. waters characterized, in accordance with Polish law, by radon activity concentration of at least 74 Bq·L−1. Such waters may be used for balneotherapeutic treatments. For the Karkonosze, Strzegom-Sobótka,
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47

Manic, Vesna, Goran Manic, Branko Radojkovic, Dusica Vucic, Dragoslav Nikezic, and Dragana Krstic. "Measurement of radon concentration in kindergartens and schools in Nis, Serbia." Facta universitatis - series: Physics, Chemistry and Technology 17, no. 2 (2019): 191–97. http://dx.doi.org/10.2298/fupct1902191m.

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In this study, the activity concentration of radon, 222Rn, in kindergartens and schools in the town of Nis, Serbia, was explored. The method of active charcoal was applied. The measurements were carried out by gamma - spectrometry with HPGe detector. The results belong to the range of 15 Bq/m3 - 256 Bq/m3, with an average value of 59.7 Bq/m3 and a standard deviation of 25.3 Bq/m3. It was shown that data are distributed according to the log-normal distribution, and that is no correlation between indoor 222Rn concentrations and the activity concentrations of radium, 226Ra, in the soil.
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48

Al-Malabeh, Ahmad. "ENRICHMENT OF RADON (222Rn) CONCENTRATION IN REMAH VOLCANO, NE-JORDAN." Iraqi Geological Journal 53, no. 2B (2020): 58–70. http://dx.doi.org/10.46717/igj.53.2b.3rs-2020.08.03.

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49

Fijałkowska-Lichwa, Lidia, and Tadeusz A. Przylibski. "A COMPREHENSIVE CHARACTERISTIC OF 222Rn ACTIVITY CONCENTRATION CHANGES AND IONISING RADIATION EXPOSURE IN NEWLY DISCOVERED PARTS OF BEAR CAVE IN KLETNO, POLAND." Radiation Protection Dosimetry 188, no. 1 (2019): 79–97. http://dx.doi.org/10.1093/rpd/ncz263.

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Abstract The article presents the results of research into 222Rn activity concentration changes and ionising radiation exposure in newly discovered parts of Bear Cave in Kletno, unknown until 2012. 222Rn activity concentration was registered at three measurement points located inside over 500-m-long newly discovered cave passages. The air in these parts of the cave is characterised by a stable temperature of about 5°C and a relative humidity of 100%. The measurements started in September 2013 and were completed by mid-July 2016. The measured data were recorded continuously, including hourly re
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Keller, G., and M. Schütz. "Radon Exhalation from the Soil." Radiation Protection Dosimetry 24, no. 1-4 (1988): 43–46. http://dx.doi.org/10.1093/oxfordjournals.rpd.a080238.

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Abstract The exhalation of radon from the soil is the main source for high radon concentration in dwellings. A study of the mechanism of exhalation, its dependence on various parameters and the entry points for radon in houses are presented. Electrostatic deposition of the radon daughter products on a surface barrier detector and subsequent analysis of the measured alpha spectra allows one to determine the exhalation rates of 222Rn and 220Rn directly from the soil. For a sampling time of two hours, the lower limit of detection of our equipment was found to be 0.3 x 10-3 Bq.m-2.s-1 for 222Rn. I
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