Results 171 to 180 of about 1,309 (228)

Radon Daughter Exposures in the U.K.

Health Physics, 1983
Exposure due to the inhalation of the short-lived daughters of 222Rn is the single largest contributor to the exposure of the U.K. population. A survey of dwellings situated largely in the centers of population indicates an annual exposure of 0.16 WLM, on the average.
K D, Cliff, A D, Wrixon, B M, Green, J C, Miles   +3 more
openaire   +2 more sources

Measurement of Radon Daughters in Air

Health Physics, 1972
AbstractA simple method for determination of RaA, RaB and RaC has been developed which has a sensitivity of the order of 1 pCi/l. for each nuclide. An air sample is obtained and the total alpha disintegrations in three selected time intervals after the end of air sampling determined.
openaire   +2 more sources

Background Concentrations of Radon and Radon Daughters in Canadian Homes

Health Physics, 1980
Abstract Measurements of radon and radon daughters were carried out in 14 Canadian cities on a total of 9999 homes selected in a statistically random manner. The geometric means of the different cities varied from 0.14 to 0.88 pCi/l for radon and 0.0009 to 0.0036 Working Levels for radon daughters.
R G, McGregor, P, Vasudev, E G, Letourneau, R S, McCullough, F A, Prantl, H, Taniguchi   +5 more
openaire   +2 more sources

Radon and radon daughter levels in energy efficient housing

Science of The Total Environment, 1985
Radon and radon daughter concentrations have been measured in 33 "energy-efficient" homes in a small subdivision in Kanata, Ontario. Integrated radon measurements were determined over three month periods for a year using solid state nuclear track detectors.
R G, McGregor, W B, Walker, E G, Létourneau   +2 more
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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.
openaire   +1 more source

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
openaire   +2 more sources

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.
openaire   +2 more sources