Results 121 to 130 of about 260 (151)
Measurement of radon/thoron exhalation rates and gamma ray dose rate in granite areas in Japan
Measurement of radon/thoron exhalation rates and gamma ray dose rate in granite areas in Japanopenaire
Radiation Measurements, 2008 Abstract Standardization of the thoron exhalation measurements is important for the intercomparison of the results among different laboratories. There are a few important distinctions between thoron (220Rn) and radon (222Rn) exhalation measurements using an accumulation chamber, due to a great difference between radon and thoron diffusion lengths in ...
P Ujic, I Celikovic
exaly +4 more sources
Intercomparison on the measurement of the thoron exhalation rate from building materials
Journal of Environmental Radioactivity, 2021 Thoron (220Rn) exhalation from building materials has become increasingly recognized as a potential source for radiation exposure in dwellings. However, contrary to radon (222Rn), limited information on thoron exposure is available. As a result no harmonized test procedures for determining thoron exhalation from building materials are available at ...
G. de With +6 more
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Thoron exhalation rate in stony materials: A simplified approach
Construction and Building Materials, 2018Abstract A significant percentage of the thoron present in indoor environments is often attributable to building materials. It is therefore interesting to estimate the thoron exhalation rate from these materials. However, the detection of thoron is not a simple task: the very short half life of thoron and the lack of strong gamma emissions, prevents ...
Mauro Magnoni +4 more
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Influence of humidity on radon and thoron exhalation rates from building materials
Applied Radiation and Isotopes, 2015The contributions of radon and thoron from building materials to total radon (thoron) entry rates in dwellings range from almost zero to several percent. It is necessary to measure radon and thoron exhalation rates, among other things, to assess the radiological hazard to human health in a living environment.
Miroslaw Janik +2 more
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In situ measurements of thoron exhalation rate in Okinawa, Japan
Radiation Protection Dosimetry, 2010 Thoron exhalation rates from the ground surface were measured at 57 sites on Okinawa Island, Japan, using a ZnS(Ag) scintillation detector equipped with photomultiplier. The arithmetic means ± SD, median ± SD, minimum and maximum of the rates (unit: Bq m(-2) s(-1)) were estimated to be 1.9 ± 1.4, 1.6 ± 0.3, 0.04 and 6.2, respectively.
Y, Shiroma +6 more
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Exhalation rate study of radon/thoron in some building materials
Radiation Measurements, 2001Abstract Indoor radon/thoron have been recognised as one of the health hazards for mankind. Common building materials used for construction of houses, which are considered as major sources of these gases in indoor environment, have been studied for exhalation rate of radon/thoron.
Hardev Singh Virk
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Influence of soil environmental parameters on thoron exhalation rate
Radiation Protection Dosimetry, 2010 Field measurements of thoron exhalation rates have been carried out using a ZnS(Ag) scintillation detector with an accumulation chamber. The influence of soil surface temperature and moisture saturation on the thoron exhalation rate was observed. When the variation of moisture saturation was small, the soil surface temperature appeared to induce a ...
M, Hosoda +11 more
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Radon and Thoron exhalation rate map in Japan
AIP Conference Proceedings, 2008 Measurements of radon and thoron exhalation rates have been done using the radon and thoron exhalation rate measuring instrument adopting the accumulation method. We obtained the 111 data in the 40 sites of the 14 prefectures in Japan. The arithmetic average value of the radon and thoron exhalation rates by all 111 data were obtained to be 8.6 mBq⋅m−2 ...
Hosoda Masahiro +8 more
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Investigation of radon and thoron exhalation rates in soils: Manali-Leh Highway region of Himalayas
Journal of Environmental RadioactivityThis study analyses the natural radionuclides concentration (226Ra and 232Th) along with the radon and thoron exhalation rates in 50 soil samples collected from the Manali-Leh Highway region of the Himalayas. The specific activity of 226Ra and 232Th radionuclides was determined using a NaI(Tl) detector, revealing that the concentration values of these ...
Bhupesh Khyalia +2 more
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