Results 131 to 140 of about 733 (185)

Radon Daughter Plateout - I Measurements

Health Physics, 1983
Radon daughter plateout (surface deposition) was measured directly in 1.9 and 20-m3 chambers. To test the effect of different parameters on plateout, measurements were made over a wide range of particle concentrations and sizes. The results indicate that plateout is strongly dependent on particle concentration.
A C, George, E O, Knutson, K W, Tu
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Investigation of radon daughters

Journal of Geophysical Research, 1963
A Goetz aerosol spectrometer and low-level counting techniques were used in studying the size distribution of natural radioactive aerosol particles. A number of values down to radii of 3×10−6 cm were obtained. These are compared with computed distribution curves and with estimates from experimental work of a different kind.
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On the Behaviour of Radon Daughters in Indoor Air

Radiation Protection Dosimetry, 1984
In the present work the effect of small aerosol particles and the effect of the air cleaning devices on the behaviour of the decay products have been studied. The long term measurements in a one-family house have shown that the behaviour of the decay products is strongly dependent on both the concentration of aerosol particles (i.e.
Lehtimäki, Matti, Graeffe, Gunnar, Janka, Kauko, Kulmala, Vesa, Rajala, Markku   +5 more
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Electrets for Passive Radon Daughter Dosimetry

Health Physics, 1984
Electrets are demonstrated to collect radon-daughter aerosols with efficiencies which are similar to the efficiencies of aluminum discs held at a potential equal to the surface potential of the electrets. The properties of the electrets are suitable for incorporation of an electret into a radon-daughter dosimeter as the passive collecting element.
A, Khan, C R, Phillips
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Thoron and Radon Daughters in Different Atmospheres

Health Physics, 1980
AbstractThe radon and thoron daughter concentrations in different atmospheres are discussed in this paper. If the daughter concentrations are expressed in WL, the calculations show that the thoron daughter concentration may well exceed the radon daughter concentration.
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Radon and radon daughter evaluation in a natural radioactivity survey indoors

Science of The Total Environment, 1985
An indoor survey in order to estimate the population exposure in five towns of an Italian Region is presented. A particular methodology for the campaign was planned and is being applied. Gamma spectrometry of building materials, exposure rate measurements indoors and outdoors and radon concentration measurements indoors were taken with different ...
G, Campos Venuti, S, Risica, A, Antonini, R, Borio, G, Gobbi, M P, Leogrande   +5 more
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Improved Radon Daughter Monitoring Procedure

American Industrial Hygiene Association Journal, 1969
Abstract A simple, rapid procedure for monitoring radon daughters in mine air has been developed., Air is drawn through a membrane filter for a period, the duration of which is adjusted to the minimum sampling time necessary to give a specified accuracy in the final results.
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Radon Daughter Exposure to Uranium Miners

Health Physics, 1982
Radon exposures to U.S. uranium miners under present conditions average about 1.3 WLM per year approximately or equal to 60 WLM per full working lifetime. This is intermediate between (a) the lowest exposures for which there have been excess lung cancers reported among U.S. miners (120-240 WLM) and (b) average environmental radon exposures (16 WLM), so
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RADON GAS TESTING: A POOR INDICATOR OF RADON DAUGHTER EXPOSURE

American Industrial Hygiene Association Journal, 1990
The problem of residential radon has created a demand for testing services that has been partly met by industrial hygienists. The United States Environmental Protection Agency (EPA), while disavowing responsibility or jurisdiction in this matter, has nonetheless published guidelines for homeowners to use in interpreting test results.
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Chemical Methods for Removing Radon and Radon Daughters from Air

Science, 1972
Liquid bromine trifluoride and the solid complexes ClF 2 SbF 6 , BrF 2 SbF 6 , BrF 4 Sb 2 F 11 , IF 4 (SbF 6 ) 3
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