Levels of exposure to natural radiation have been calculated from the concentrations of natural gamma-emitting radionuclides present in the soils of the province of Caceres (Spain).
The objective was to estimate the external radiation dose received by the population as a function of the place of residence, and then to draw the corresponding natural exposure rate map for the region under study.
For this purpose, 263 soil samples were collected from points uniformly distributed throughout the geography of the zone.
These were analysed using gamma spectrometry.
The mean specific activities of 226Ra, 235U, 232Th and 40K were 38.3, 3.06, 41.0 and 653 Bq kg-1 dry weight, respectively, and the isoactivity maps for each isotope showed that the greatest concentrations occurred in granitic zones [...].
Mots-clés Pascal : Distribution, Répartition géographique, Répartition spatiale, Radioactivité naturelle, Spectrométrie gamma, Dosimétrie, Dose absorbée, Homme, Radioisotope, Espagne, Zone minière, Minerai uranium, Sol, Région méditerranéenne, Sol granite, Europe, Environnement, Europe Sud
Mots-clés Pascal anglais : Distribution, Geographic distribution, Spatial distribution, Natural radioactivity, Gamma spectrometry, Dosimetry, Absorbed dose, Human, Radioisotope, Spain, Mining zone, Uranium ore, Soils, Mediterranean region, Europe, Environment, Southern Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0354651
Code Inist : 002A32B03B2. Création : 199406.