title: Uncertainty of gamma-ray spectrometry measurement of environmental samples due to uncertainties in matrix composition, density and sample geometry.
abstract: This paper is intended to identify the uncertainties of activities in environmental samples measured with gamma-ray spectrometry that result from uncertainties in matrix composition, density and geometrical dimensions of the sample. For that purpose efficiencies were calculated for a wide range of environmental matrices such as fresh and ashed food samples, water samples and soil samples. Compositions were mainly taken from literature. Densities and geometry parameters were varied in a range occurring in practice. Considered energies cover a range from 46.5keV to 2000keV. Finally, a couple of recommendations in respect to gamma-ray spectrometric measurements of environmental samples are given.
authors.affiliation: Safety and Environment, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany. Electronic address: susanne.kaminski@kit.edu.
authors.forename: S
authors.initials: S
authors.lastname: Kaminski
authors.affiliation: Safety and Environment, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Jakobi
authors.affiliation: Safety and Environment, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Chr
authors.initials: C
authors.lastname: Wilhelm
keywords: Efficiency calibration; Environmental radioactivity; Gamma-ray spectrometry; LabSOCS; Self-attenuation; Uncertainties