title: A method for determining Am-241 activity for large area contamination.
abstract: Airborne gamma-ray spectrometry system HELINUC™ is used for different missions. Although well-developed for estimation of high energy emitters' activity, it is rarely used for low energy emitters. A new method for the determination of Am-241 activity over extended sites based both on statistical analysis of spectra and deconvolution of Am-241 signal with a reference library is presented. Results show a lowering of the detection threshold and a good agreement with ground level measurements.
authors.affiliation: CEA DAM Ile de France, Bruyères-le-Châtel, 91297 Arpajon, France. Electronic address: emilien.wilhelm@cea.fr.
authors.forename: Emilien
authors.initials: E
authors.lastname: Wilhelm
authors.affiliation: Institut Pluridisciplinaire Hubert Curien, CNRS/IN2P3, UMR 7178 Université de Strasbourg, F-67037 Strasbourg, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Arbor
authors.affiliation: CEA DAM Ile de France, Bruyères-le-Châtel, 91297 Arpajon, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Gutierrez
authors.affiliation: CEA DAM Ile de France, Bruyères-le-Châtel, 91297 Arpajon, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Ménard
authors.affiliation: Institut Pluridisciplinaire Hubert Curien, CNRS/IN2P3, UMR 7178 Université de Strasbourg, F-67037 Strasbourg, France.
authors.forename: Abdel-Mjid
authors.initials: AM
authors.lastname: Nourreddine
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000398:Air Pollution, Radioactive / Q000032:analysis; D000401:Aircraft; D000576:Americium / Q000032:analysis*; D003198:Computer Simulation; D005602:France; D006801:Humans; D057230:Limit of Detection; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D013051:Spectrometry, Gamma / Q000379:methods*
chemical_list: D000396:Air Pollutants, Radioactive; C000615192:Americium-241; D000576:Americium
keywords: Airborne gamma spectrometry; Data analysis; Monte Carlo simulation; Radiation measurements