Natural radioactivity and radon exhalation in stony materials.
Recently, radon sources have been a matter of concern, as high levels have been measured in some houses.
This work contributes to the assessment of radon exhalation from those stones which are mostly used for building materials.
The first part of this paper concerns measurements of natural radionuclide concentrations (238U, 232Th) in building materials by means of gamma-spectrometry.
The second part deals with the determination of stone exhalation rate using a particular instrument, called an'emanometer'designed and developed at our institute.
As a general result, this research indicates that the radon exhalation is determined more by the peculiar characteristics of the building material than by its specific content of radium.
Mots-clés Pascal : Radon, Rn 222, Phase gazeuse, Emission atmosphérique, Contamination, Radionucléide, Désintégration radioactive, Bâtiment, Matériau construction, Uranium, Thorium, U 238, Th 232, Spectrométrie gamma, Radium, U 235, Méthodologie analyse, Instrumentation, Potassium, K 40, Ra 226, Marbre, Roche métamorphique, Granite, Roche plutonique, Roche ignée, Gneiss, Travertin, Roche carbonatée, Roche sédimentaire, Pollution intérieur, Rn 219, Ardoise, Exhalation, Porphyre, Syénite, Calcaire, Trachyte, Roche volcanique, Basalte
Mots-clés Pascal anglais : radon, Rn-222, gaseous phase, atmospheric emission, contamination, radionucleids, radioactive decay, buildings, construction materials, uranium, thorium, U-238, Th-232, gamma-ray spectroscopy, radium, U-235, chemical analysis methodology, instruments, potassium, K-40, Ra-226, marbles, metamorphic rocks, granites, plutonic rocks, igneous rocks, gneisses, travertine, carbonate rocks, sedimentary rocks, porphyry, syenites, limestone, trachytes, volcanic rocks, basalts
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0077678
Code Inist : 001E01O04. Création : 21/05/1997.