Title: A New Low-level Gamma-ray Spectrometry System for Environmental Radioactivity at the Underground Laboratory Felsenkeller
Authors: KOEHLER MatthiasDEGERING DetlefLAUBENSTEIN MatthiasQUIRIN PierreLAMPERT M.-O.HULT MikaelARNOLD DirkNEUMAIER StefanREYSS Jean-Louis
Citation: APPLIED RADIATION AND ISOTOPES vol. 67 no. 5 p. 736-740
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2009
JRC Publication N°: JRC49325
ISSN: 0969-8043
URI: http://www.elsevier.com/locate/apradiso
http://publications.jrc.ec.europa.eu/repository/handle/JRC49325
DOI: 10.1016/j.apradiso.2009.01.027
Type: Contributions to Conferences
Abstract: A low-level gamma-ray spectrometry system, based on HPGe-detector with 92% relative efficiency recently installed in the underground laboratory Felsenkeller at 110 m w.e. depth, is described. The integral background count rate normalised to the Ge-crystal mass in the energy range from 40 keV until 2.7 MeV of 0.034 s-1 kg-1 has been achieved by careful material selection of the detector construction material, a graded shielding construction and effective radon suppression. The detector is highly suitable for the effective surveillance of water for human consumption with decision thresholds for 226Ra and 228Ra in the order of some mBq L-1.
JRC Institute:Institute for Reference Materials and Measurements

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