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-1 for 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. © 2012 Akadémiai Kiadó, Budapest, Hungary.
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Malczewski, D., Kisiel, J., & Dorda, J. (2012). Gamma background measurements in the Laboratoire Souterrain de Modane. Journal of Radioanalytical and Nuclear Chemistry, 292(2), 751–756. https://doi.org/10.1007/s10967-011-1497-9