Radon (222Rn) and its daughter products are present in an indoor atmosphere as attached and unattached fractions.
The plateout of 222Rn daughters on surfaces and the rate of ventilation of the house decides the extent of the equilibrium between them.
Since the daughter products are responsible for the inhalation dose, the equilibium factor F, between 222Rn and its daughters must be known to assess the dose from measurements of 222Rn gas.
Reported F values by several countries show a large variation from 0.03 to 0.95 depending on the type of house, the location, the height and the seasons.
Mots-clés Pascal : Radon, Rn 222, Désintégration radioactive, Bâtiment, Phase gazeuse, Variation spatiale, Variation saisonnière, Habitat, Rayonnement alpha, Radioactivité, Inde, Asie, Atmosphère intérieure, Risque, Protection homme, Dosimétrie
Mots-clés Pascal anglais : radon, Rn-222, radioactive decay, buildings, gaseous phase, spatial variations, seasonal variations, habitat, alpha rays, radioactivity, India, Asia
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0045904
Code Inist : 001E01C01. Création : 09/06/1995.