Results 111 to 120 of about 1,326 (179)
Analysis of indoor radon concentration levels and trends in China. [PDF]
Front Public HealthDing B, Wu Y, Song Y, Hou C, Shang B.
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Radiological characterization related to lithology and risk assessment of bottled natural mineral water. [PDF]
Environ Monit AssessMartínez J +4 more
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222Rn in Groundwater in Nigeria
Health Physics, 1992222Rn in groundwater was measured in wells of different rock types in Nigeria by direct gamma counting. Concentrations ranged between 1.7 +/- 0.1 and 161.6 +/- 2.4 Bq L-1, with only slight variations (maximum 2.1 sigma from the mean) in a year in a typical well.
I P, Farai, A O, Sanni
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Modeling the Effects of Exhaust Ventilation on 222Rn Entry Rates and Indoor 222Rn Concentrations
Health Physics, 1988Continuous mechanical exhaust ventilation of moderately air-tight residences is common in Scandinavia and has recently been employed in several U.S. residences. Exhaust ventilation decreases the indoor pressure and, thus, increases the pressure difference which drives 222Rn entry. Relatively simple analytical (i.e.
R J, Mowris, W J, Fisk
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222Rn + 220Rn monitoring by alpha spectrometry
Radiation Protection Dosimetry, 2014Controlled 222Rn+220Rn mixed atmospheres have been realised introducing calibrated sources in a stainless steel chamber. An electrostatic alpha monitor internal to the chamber has been used for an accurate discrimination of alpha peaks due to the products of the two isotopes.
R. Buompane +5 more
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Exposure of burrowing mammals to 222Rn
Science of The Total Environment, 2012Estimates of absorbed dose rates to wildlife from exposure to natural background radionuclides are required to put estimates of dose rates arising from regulated releases of radioactivity and proposed benchmarks into context. Recent review papers have estimated dose rates to wildlife from (40)K, and (238)U and (232)Th series radionuclides.
Beresford, N.A. +8 more
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Contribution of 222Rn in Domestic Water Supplies to 222Rn in Indoor Air in Colorado Homes
Health Physics, 1992The contribution of 222Rn from domestic water wells to indoor air was investigated in a study of 28 houses near Conifer, CO. Air concentrations determined by alpha-track detectors (ATDs) and continuous radon monitors were compared with the predictions of a single-cell model.
E P, Lawrence, R B, Wanty, P, Nyberg
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1993
Abstract A low-background ZnS scintillator cell based on a design by Lucas has been developed for 222 Rn detection. Typical cells have 63% detection efficiency and 3 counts per day background. The cells have been used in measurements of 222 Rn emanation rate into vacuum from materials to be used under water in the Sudbury Neutrino Observatory (SNO)
Manqing Liu, H.W. Lee, A.B. McDonald
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Abstract A low-background ZnS scintillator cell based on a design by Lucas has been developed for 222 Rn detection. Typical cells have 63% detection efficiency and 3 counts per day background. The cells have been used in measurements of 222 Rn emanation rate into vacuum from materials to be used under water in the Sudbury Neutrino Observatory (SNO)
Manqing Liu, H.W. Lee, A.B. McDonald
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Permeability of Caulking Compounds to 222Rn
Health Physics, 1992Caulking compounds have been tested as 222Rn barriers. Of these, the most effective is GE acrylic Latex Silicone Caulk, 0.2 cm of which attenuates 222Rn by 98% to 99.9%. The same thickness of two commercial 222Rn barriers attenuates radon by 75% to 90%. Permeabilities range from 0.3 to 140 x 10(-8) cm2 s-1.
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