Results 211 to 220 of about 10,473 (258)

Development of a primary thoron activity standard for the calibration of thoron measurement instruments

Radiation Protection Dosimetry, 2015
The LNHB and IRSN are working on a reference atmosphere for thoron ((220)Rn) instrument calibration. The LNHB, as the national metrology institute for activity measurement in France, has to create a new thoron reference standard in order to estimate with accuracy the thoron concentration of a reference atmosphere.
Sabot, Benoît, Pierre, S., Cassette, P., Michielsen, N., Bondiguel, S.   +4 more
openaire   +2 more sources

The ENEA-IRP thoron calibration facility

Radiation Protection Dosimetry, 2010
To check the consistency of a (220)Rn measurement, performed by passive alpha track detector (ATD), the use of an accurate (220)Rn exposure calibration facility is mandatory. The ENEA Radon Service developed a new CR-39 ATD-Tn, coupled to the radon ATD-Rn and, to assess its sensitivity, had to design a small calibration facility, which has been ...
M, Calamosca, S, Penzo
openaire   +2 more sources

EML Thoron Gas Measurements

Radiation Protection Dosimetry, 1994
Abstract The Environmental Measurements Laboratory's experience with two methods of measuring thoron gas, and its findings on the feasibility of using these measurements to diagnose indoor air flow paths, are presented. One method is an updated version of the two-filter tube, and the other is a modified Falk-More-Nyblom delayed ...
E.O. Knutson, A.C. George, P. Shebell, C.V. Gogolak   +3 more
openaire   +1 more source

Neutralization of Thoron Progeny in Gases

Health Physics, 1994
This paper reports charge neutralization phenomena of 212Pb particles in nitrogen or oxygen atmospheres with trace amounts of other gases. Newly produced thoron or radon progeny are positively charged, stable molecular clusters that are subsequently neutralized by several mechanisms.
Y S, Cheng, C C, Yu, C J, Tung, P K, Hopke   +3 more
openaire   +2 more sources

Measurement of Thoron in the Breath

Physics in Medicine and Biology, 1958
A method of measuring the thoron content of the breath of patients who have been injected with colloidal thorium dioxide as a radiological contrast medium, is described. The levels are sufficiently high for the decay of the thoron to be observed using only four litres of breath, being in the range 250 to 2000 μμc per litre, and they can be used to ...
J, RUNDO, A H, WARD, P G, JENSEN
openaire   +2 more sources

Thoron in the Environment

Journal of the Air & Waste Management Association, 1990
Thoron (220Rn), an isotope of the radon family, is produced in the earth’s crust at a rate comparable to that of common radon (222Rn). Thoron’s average activity concentration in soil gas and ground-level outside air is comparable to that of radon. Recent data from Europe and the United States indicate that in terms of the energy of the alpha particle ...
openaire   +1 more source

Thoron Exhalation in Radiothorium-Burdened Beagles

Radiation Research, 1958
In an attempt to unravel the effects of these radioelements, separate groups of young adult beagles were injected with Ra226, Ra228, and Th228 at this laboratory, and the metabolism and effects of these bone-seeking radio-elements and their daughters are under study. Thoron, a chemically inert gas, lies in the thorium decay series.
C W, MAYS, R, HALDIN, M A, VAN DILLA
openaire   +2 more sources

Health Risk Assessment, and Seasonal Radon-Thoron Concentrations of Water Samples in Kahramanmaras Sutcu Imam University, TURKEY

MAPAN, 2023
E. Küçükönder, S. Gümbür
semanticscholar   +1 more source

Spatial distribution and radiological risk assessment of soil radon (222Rn) and thoron (220Rn) in Gandhinagar city, Gujarat, India

Journal of Radioanalytical and Nuclear Chemistry, 2023
S. K. Sahoo, M. Katlamudi, B. P.
semanticscholar   +1 more source

Effect of soil’s porosity and moisture content on radon and thoron exhalation rates

Journal of Radioanalytical and Nuclear Chemistry, 2022
A. Pyngrope, A. Saxena, A. Khardewsaw, Y. Sharma, B. Sahoo   +4 more
semanticscholar   +1 more source