Results 161 to 170 of about 1,468 (205)
Novel method of measurement of radon exhalation from building materials [PDF]
Journal of Environmental Radioactivity, 2016 In the era of the energy saving policy (i.e. more air tight doors and windows), the radon exhaled from building materials tends to increase its concentration in indoor air, which increases the importance of the measurement of radon exhalation from ...
P Ujic, Ivana Vukanać, I Celikovic
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Modeling of radon exhalation from soil influenced by environmental parameters [PDF]
Science of the Total Environment, 2019 Atmospheric radioactive noble gas radon (Rn-222) originates from soil gas exhaled in the atmospheric surface layer. Radon exhalation rates from soil as well as corresponding meteorological and soil parameters were recorded for two subsequent years. Based
Hannah Busen +2 more
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Radon permeability and radon exhalation of building materials
Science of The Total Environment, 2001High radon concentrations indoors usually depend on the possibilities of radon penetration from the surrounding soil into the buildings. Radon concentrations in dwellings up to 100 kBq/m3 were found in some special regions (i.e. Schneeberg/Saxony, Umhausen/Tyrol), where the soil shows a high uranium content and additionally, a fast radon transport in ...
G, Keller, B, Hoffmann, T, Feigenspan
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Radon in the Exhaled Air of Patients in Radon Therapy
Radiation Protection Dosimetry, 2017In the Gastein valley, numerous facilities use radon for the treatment of various diseases either by exposure to radon in air or in radon rich thermal water. In this study, six test persons were exposed to radon thermal water in a bathtub and the time-dependent radon activity concentration in the exhaled air was recorded.
Herbert, Lettner +5 more
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Radiation Protection Dosimetry, 1996
A radon exhalation monitor has been constructed and calibrated. The monitor is based on the adsorption of radon by active charcoal and the subsequent measurement of its γ activity by means of high resolution γ spectrometry. Exhalation rates may be determined with an accuracy of better than 20% within 48 h after exposure.
S. Oberstedt, H. Vanmarcke
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A radon exhalation monitor has been constructed and calibrated. The monitor is based on the adsorption of radon by active charcoal and the subsequent measurement of its γ activity by means of high resolution γ spectrometry. Exhalation rates may be determined with an accuracy of better than 20% within 48 h after exposure.
S. Oberstedt, H. Vanmarcke
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Diffusion Model of Radon Exhalation Rates
Health Physics, 1998Radon migration through walls is considered using an effective diffusion model. One and two dimensional models as well as a spherical geometry are compared. It is concluded that either the 1-dimensional or spherical model, both having analytical solution, may be used for practical purposes. Application is made for typical cases in Athens, Greece.
M, Antonopoulos-Domis +2 more
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An International Intercomparison of Soil Gas Radon and Radon Exhalation Measurements
Health Physics, 1998The Environmental Measurements Laboratory hosted the Sixth International Radon Metrology Programme Intercomparison Test and Workshop (IRMP6) from 12-15 June 1995. Thirty participants representing 24 different institutions from 11 countries attended. Laboratory exercises consisted of 220Rn and 222Rn concentration measurements from a source container ...
A R, Hutter, E O, Knutson
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Radon Exhalation from the Soil
Radiation Protection Dosimetry, 1988Abstract 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.
G. Keller, M. Schütz
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Radon exhalation measurements for environmental and geophysics study
Radiation Physics and Chemistry, 2014Abstract Transport of radon through materials is a process strongly influenced by several parameters characterizing the materials themselves, such as porosity, permeability, grain size, content of radionuclides and diffusion coefficient of this gas through the interstitial pores and/or fractures of material.
IMME', Giuseppina +3 more
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Application of the can technique and radon gas analyzer for radon exhalation measurements
Applied Radiation and Isotopes, 2003A passive "can technique" and an active radon gas analyzer with an emanation container were applied for radon exhalation rate measurements from different construction materials, viz. five marble seven ceramic and 100 granite tiles used in Saudi Arabia.
, Fazal-ur-Rehman +3 more
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