Results 121 to 130 of about 1,326 (179)
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An Evaluation of 222Rn Concentrations in Idaho Groundwater
Health Physics, 1998Factors potentially correlated with 222Rn concentrations in groundwater were evaluated using a database compiled by the U.S. Geological Survey. These included chemical and radiological factors, and both well depth and discharge rate. The 222Rn concentrations contained within this database were examined as a function of latitude and longitude.
L R, Paulus, T F, Gesell, R R, Brey
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Health Physics, 1992
Membranes that exclude water but are permeable to radon can extend the range of environments where many radon detection systems could operate. We have studied the permeation of 222Rn through polypropylene membranes separating air and water phases. The permeation coefficient and the activation energy were calculated for various conditions.
V, Labed, A, Rannou, G, Tymen
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Membranes that exclude water but are permeable to radon can extend the range of environments where many radon detection systems could operate. We have studied the permeation of 222Rn through polypropylene membranes separating air and water phases. The permeation coefficient and the activation energy were calculated for various conditions.
V, Labed, A, Rannou, G, Tymen
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Present status of 222Rn in groundwater in Extremadura
Journal of Environmental Radioactivity, 2008Radon-222 was measured in groundwater sources of Extremadura (Spain), analyzing 350 samples from private and public springs, wells, and spas by liquid scintillation counting (LSC) and gamma spectrometry. The 222Rn activity concentrations ranged from 0.24 to 1168 Bq L(-1). The statistical analysis showed a log-normal distribution with a mean of (111+/-7)
M, Galán López, A, Martín Sánchez
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Primary and secondary measurements of 222Rn
Applied Radiation and Isotopes, 2004In the past few years, a primary measurement system has been established at the PTB allowing absolute measurements of 222Rn. The activity can be determined by counting the emitted alpha particles in a defined solid angle after condensing the radon at a cold point under vacuum conditions.
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AIRBORNE 222Rn CONCENTRATION IN AN EGYPTIAN VILLAGE
Health Physics, 2002The indoor radon concentration in a typical Egyptian village in Delta was measured in 50 houses during summer 1999 and winter 2000. This survey was done using three different types of charcoal canisters: 4" open-faced, 2.75" open-faced, and 2.75" diffusion barrier.
W, Arafa +3 more
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Indoor 222Rn Concentrations in Central Asturias
Health Physics, 1996A survey of the 222Rn concentrations in 106 homes in the four main towns of the Central Asturias region was carried out over three years. A total of 1,014 measurements was obtained using passive radon charcoal canisters. The 222Rn concentrations fit a log-normal distribution law, with a geometric mean of 23 Bq m(-3).
J M, Pérez Iglesias +3 more
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Applied Radiation and Isotopes, 2006
NIST radon standards are hermetically sealed polyethylene capsules filled with 226Ra solution. Recently, four new series of standards with activities 5, 50, 500, and 5000 Bq were prepared. The measured emanation fraction agrees with a calculation that accounts for the radon accumulated inside the polyethylene walls of the capsule.
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NIST radon standards are hermetically sealed polyethylene capsules filled with 226Ra solution. Recently, four new series of standards with activities 5, 50, 500, and 5000 Bq were prepared. The measured emanation fraction agrees with a calculation that accounts for the radon accumulated inside the polyethylene walls of the capsule.
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222Rn Variations in Mystery Cave, Minnesota
Health Physics, 1995222Rn concentrations and meteorological parameters were measured at 4-h intervals over a 2-y period in Mystery Cave, southeastern Minnesota. Continuous radon monitors and meteorological sensors connected to data loggers were installed at several locations along commercial tour routes.
R S, Lively, B C, Krafthefer
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GAMMA DISTRIBUTION AND HOUSE 222Rn MEASUREMENTS
Health Physics, 1992The statistical distribution of 222Rn measurements from basements and first floors of homes in northeastern Pennsylvania was investigated. The gamma distribution was statistically significantly superior to the normal distribution (p less than 0.005) in describing the frequency distribution of the logarithm of observed 222Rn levels.
I, Janssen, J H, Stebbings
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Prediction of 222Rn from Topography in Pennsylvania
Health Physics, 1991The relationships of Rn levels in basements and first floors of homes to topographic location in a northeastern ridge and valley section of Pennsylvania were investigated. Topographic variables relating to elevation and slope were quantified and related to house Rn levels using both conventional and classification and regression tree (CART) analyses ...
I, Janssen +4 more
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