title: Measurement of natural radionuclides in phosphgypsum using an anti-cosmic gamma-ray spectrometer.
abstract: Gamma-ray spectrometry measurements have been carried out to determine the activity of natural radionuclides in a phosphogypsum sample included in a specific tight container. The gamma spectrometer includes an N-type coaxial high-purity germanium (HPGe) detector equipped with an anti-cosmic system. This measurement required the determination of linear attenuation coefficients of phosphogypsum to calculate self-absorption correction between efficiency calibration conditions and measurement ones. The results are given for the three natural chains and for (40)K, in term of specific activity/g of dry material, ranging from a few Bq kg(-1) to a few hundreds Bq kg(-1). The equilibrium within the different families and the (235)U/(238)U ratio are discussed.
authors.affiliation: CEA, LIST, Laboratoire National Henri Becquerel, F-91191, Gif-sur-Yvette Cedex, France. laurent.ferreux@cea.fr
authors.forename: Laurent
authors.initials: L
authors.lastname: Ferreux
authors.forename: Gérard
authors.initials: G
authors.lastname: Moutard
authors.forename: Thierry
authors.initials: T
authors.lastname: Branger
mesh_terms: D000042:Absorption; D002133:Calcium Sulfate / Q000032:analysis*; D002138:Calibration; D010758:Phosphorus / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D013051:Spectrometry, Gamma / Q000295:instrumentation / Q000379:methods*
chemical_list: D011868:Radioisotopes; C077769:phosphogypsum; D010758:Phosphorus; D002133:Calcium Sulfate