title: Gamma background measurements in the Laboratoire Souterrain de Modane.
abstract: In situ gamma-ray measurements were taken at six locations in the Modane Underground Laboratory. Count rates for gamma radiation within the energy range of 7-2734 keV varied from 15 to 108 γs-1. The arithmetic mean was 79 γs-1for measurements taken without a collimator. The metamorphic rocks surrounding the Lab are characterized by low activity concentrations of uranium and thorium equal to 12 and 10 Bq kg-1, respectively.
authors.affiliation: Faculty of Earth Sciences, University of Silesia, Bedzinska 60, 41-200 Sosnowiec, Poland.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Malczewski
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Jan
authors.initials: J
authors.lastname: Kisiel
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Jerzy
authors.initials: J
authors.lastname: Dorda
keywords: Gamma background; Gamma fluxes; Gamma-ray spectrometry; Underground laboratory