title: Update of (40)K and (226)Ra and (232)Th series γ-to-dose conversion factors for soil.
abstract: Over the last four decades, the dose conversion factors used to calculate external exposure to γ radiation from soil from (40)K and the (226)Ra and (232)Th chains have been 0.62, 0.042 and 0.46 (nGy/h per Bq/kg), respectively. This work updates these γ-to-dose conversion factors, taking into consideration the composition, depth and radius of the soil source, and importantly, updated branching ratios, with MCNPX simulations. The new conversion factors are 0.036, 0.357 and 0.482 (nGy/h per Bq/kg) for (40)K and the (226)Ra and (232)Th chains, respectively.
authors.affiliation: Groupe RaMsEs, Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/IN2P3, 23 rue du Loess, BP 28, F-67037 Strasbourg Cedex 2, France.
authors.forename: E
authors.initials: E
authors.lastname: Gasser
authors.affiliation: Département de physique, Faculté Poly-disciplinaire de Safi, Université Cadi Ayyad, Route Sidi Bouzid BP 4162, 46000 Safi, Morocco. Electronic address: abdellatif.nachab@iphc.cnrs.fr.
authors.forename: A
authors.initials: A
authors.lastname: Nachab
authors.affiliation: Groupe RaMsEs, Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/IN2P3, 23 rue du Loess, BP 28, F-67037 Strasbourg Cedex 2, France.
authors.forename: A
authors.initials: A
authors.lastname: Nourreddine
authors.affiliation: Groupe RaMsEs, Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/IN2P3, 23 rue du Loess, BP 28, F-67037 Strasbourg Cedex 2, France.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Roy
authors.affiliation: Groupe RaMsEs, Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/IN2P3, 23 rue du Loess, BP 28, F-67037 Strasbourg Cedex 2, France.
authors.forename: A
authors.initials: A
authors.lastname: Sellam
mesh_terms: D005720:Gamma Rays; D008962:Models, Theoretical; D011829:Radiation Dosage; D011834:Radiation Monitoring; D012990:Soil Pollutants, Radioactive / Q000032:analysis*
chemical_list: D012990:Soil Pollutants, Radioactive
keywords: (226)Ra chain; (232)Th chain; (40)K; Dose conversion factor; MCNPX; Soil