Results 141 to 150 of about 1,326 (179)
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Health Physics, 2014
Scintillation cells are used typically for measuring the concentration of (222)Rn in air and are calibrated for that purpose. However, scintillation cells are sometimes used for measuring (222)Rn in natural gas or carbon dioxide. The counting efficiencies of scintillation cells for measurements of (222)Rn in these gases should be different from those ...
Phillip H, Jenkins +2 more
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Scintillation cells are used typically for measuring the concentration of (222)Rn in air and are calibrated for that purpose. However, scintillation cells are sometimes used for measuring (222)Rn in natural gas or carbon dioxide. The counting efficiencies of scintillation cells for measurements of (222)Rn in these gases should be different from those ...
Phillip H, Jenkins +2 more
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Health Physics, 1989
The external gamma radiation and the indoor air Rn (222Rn) concentration were measured in 55 houses of the South East Grisons, the Urseren valley, and the Upper Rhine valley (crystalline subsoils) and in 39 houses of the Molasse basin and the Helvetic nappes (sedimentary subsoils). In homes located on a crystalline subsoil, a mean cellar gamma level of
Buchli R, Burkart W
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The external gamma radiation and the indoor air Rn (222Rn) concentration were measured in 55 houses of the South East Grisons, the Urseren valley, and the Upper Rhine valley (crystalline subsoils) and in 39 houses of the Molasse basin and the Helvetic nappes (sedimentary subsoils). In homes located on a crystalline subsoil, a mean cellar gamma level of
Buchli R, Burkart W
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Production and measurement of 222Rn standards
Applied Radiation and Isotopes, 1998Abstract For the production of radon standards, 222 Rn is transferred from a solid 226 Ra source located in a vacuum system to different types of vessels such as glass bulbs or stainless steel cylinders. Using this radium source, up to 2 MBq of 222 Rn gas can be completely transferred when the radon is condensed in a liquid-nitrogen cooled vessel.
R Dersch, U Schötzig
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A study of 222Rn/220Rn exhalation rate and indoor 222Rn/220Rn levels in higher Himalayan terrain
Radiation Protection DosimetryAbstract The noble radioactive gas radon and its isotope thoron dominate terrestrial radiation in the indoor environment. These gases eventually disintegrate generating radioactive ions that readily adhere to aerosol particles. This study was conducted in a tectonically active location with significant radon concentrations.
Rohit Singh Sajwan +5 more
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An ionization chamber for 222Rn measurements
Nuclear Instruments and Methods, 1973Abstract A 4-1 ionization chamber for 226 Ra determination is described. By measuring the activity of 222 Rn in secular equilibrium with 226 Ra, the 226 Ra activity of a sample can be determined. The sample is kept in a flask for about one month to achieve secular equilibrium.
S.A. Christer Högberg +1 more
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Controls on pore-fluid concentration of 4He and 222Rn and the calculation of 4He/222Rn ages
Journal of Geochemical Exploration, 1980Abstract Controls governing the production of 4He and 222Rn in the solid phase as well as parameters and processes contributing to their transport into the pore fluid are discussed. 222Rn activity is used to quantify the uranium sources for 4He and the result is a simplified pore-fluid age equation which is virtually independent of the porosity, the ...
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Survey of Indoor 222Rn Concentrations in Hong Kong
Health Physics, 1991link_to_subscribed_fulltext
Leung, JKC, Tso, MYW
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Journal of Environmental Radioactivity
Deposition velocities of 222Rn progeny were determined using 222Rn progeny sensors (DRPS) and flow-mode integrated samplers at various 222Rn gas concentrations under steady atmospheric conditions in a large walk-in type calibration chamber of volume 22.7 m3 with a surface-to-volume ratio of 2.1 m-1. The deposition of 222Rn progeny on indoor surfaces is
Vijith A P +4 more
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Deposition velocities of 222Rn progeny were determined using 222Rn progeny sensors (DRPS) and flow-mode integrated samplers at various 222Rn gas concentrations under steady atmospheric conditions in a large walk-in type calibration chamber of volume 22.7 m3 with a surface-to-volume ratio of 2.1 m-1. The deposition of 222Rn progeny on indoor surfaces is
Vijith A P +4 more
openaire +2 more sources