title: Computational Approaches on Photon-Attenuation and Coincidence-summing Corrections for the detection of gamma-emitting radionuclides IN foods.
abstract: Source-based calibration methods used for photon attenuation and coincidence summing corrections are time consuming and require multiple certified standards that match sample geometry with varying densities. Three programs which are capable of simulating a variety of sample geometries, matrix compositions, and sample densities have been examined as alternatives. LabSOCS, ANGLE 3 and GESPECOR are effective at generating efficiency curves for food matrices with a range with different densities. The curves generated have been successfully used to determine activity in food samples.
authors.affiliation: Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA. Electronic address: Clarence.Rolle@fda.hhs.gov.
authors.forename: Clarence
authors.initials: C
authors.lastname: Rolle
authors.affiliation: Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Lin
authors.affiliation: Winchester Engineering and Analytical Center, Food and Drug Administration, 109 Holton Street, Winchester, MA 01890 USA.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Healey
mesh_terms: D002138:Calibration; D002588:Cesium Radioisotopes / Q000032:analysis; D003037:Cobalt Radioisotopes / Q000032:analysis; D005507:Food Contamination, Radioactive / Q000032:analysis*; D005720:Gamma Rays; D006801:Humans; D017785:Photons; D011874:Radiometry / Q000379:methods* / Q000706:statistics & numerical data; D012984:Software; D013051:Spectrometry, Gamma / Q000379:methods* / Q000706:statistics & numerical data
chemical_list: D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; C000614989:Cesium-137; C000615395:Cobalt-60
keywords: Density corrections; Efficiency; Gamma spectroscopy; Monte Carlo