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|Title:||Neutron Fluence Spectrometry Using Disk Activation|
|Authors:||LOEVESTAM GOERAN; HULT MIKAEL; FESSLER ANDREAS; GASPARRO JOEL; KOCKEROLS PIERRE; OKKINGA KLAAS; TAGZIRIA HAMID; VANHAVERE F.; WIESLANDER E.|
|Citation:||RADIATION MEASUREMENTS vol. 44 no. 1 p. 72-79|
|Publisher:||PERGAMON-ELSEVIER SCIENCE LTD|
|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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