Title: The Activation Contamination in the Metal-Based Ionization Chambers as Gamma Dosimeters in the Mixed Filed Dosimetry
Authors: LIU Yuan-HaoLIN Yi-ChunNIEVAART Victor AlexanderROCA AntoanetaTSAI Pi-EnLIU Hong-MingMOSS RaymondJIANG Shiang-Huei
Citation: RADIATION MEASUREMENTS vol. 45 no. 10 p. 1427-1431
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2010
JRC Publication N°: JRC52765
ISSN: 1350-4487
URI: www.elsevier.com/locate/radmeas
http://publications.jrc.ec.europa.eu/repository/handle/JRC52765
DOI: 10.1016/j.radmeas.2010.06.045
Type: Contributions to Conferences
Abstract: This study aims to determine the activation contamination in the metal-based ionization chambers, i.e. Mg(Ar)- and Al(Ar)-chambers. The contamination was estimated by directly measuring the signal caused by the radioactive nuclides after the irradiation. The INAA gamma ray spectra clearly showed that the ionization chambers were activated. The activation contamination could comprise more than 2% of the total measured current of the Mg(Ar)-chamber, and more than 50% of the Al(Ar)-chamber, both irradiated free-in-air at the THOR epithermal neutron beam. The activation contamination provides concrete evidence of the necessity of the thermal neutron sensitivity correction.
JRC Institute:Institute for Energy and Transport

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