Title: Neutron Fluence Spectrometry Using Disk Activation
Authors: LOEVESTAM GOERANHULT MIKAELFESSLER ANDREASGASPARRO JOELKOCKEROLS PIERREOKKINGA KLAASTAGZIRIA HAMIDVANHAVERE F.WIESLANDER E.
Citation: RADIATION MEASUREMENTS vol. 44 no. 1 p. 72-79
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2009
JRC Publication N°: JRC36948
ISSN: 1350-4487
URI: http://www.elsevier.com/locate/radmeas
http://publications.jrc.ec.europa.eu/repository/handle/JRC36948
DOI: 10.1016/1.rad.meas.2008.10.012
Type: Articles in Journals
Abstract: A simple and robust detector for spectrometry of environmental neutrons has been developed. The technique is based on neutron activation, i.e. the activation of a series of different metal disks followed by gamma-ray spectrometry of the activated disks and subsequent neutron spectrum unfolding. It is a technique similar to the foil activation but now applied to low neutron fluence rates. The detector has been tested in quasi mono-energetic neutron fields where the obtained spectra showed good agreement with spectra measured using a Bonner sphere spectrometer. The detector has also been tested by means of an AmBe source and, again, a good agreement with the assumed spectrum was achieved. Low-level and ultra-low level gamma spectrometry allowed for the measurements of very low neutron fluences with detection limits for fast neutrons in the order of 10 s-1 cm-2.
JRC Institute:Institute for Reference Materials and Measurements

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