Set-up of a passive Bonner sphere system for neutron spectrometry at mixed fields with predominant photon component based on activation detector

Khalil Amgarou, V. Lacoste, H. Muller, F. Fernández

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10 Citations (Scopus)

Abstract

A passive Bonner sphere system (BSS), based on thermal neutron activation detectors, was developed to perform neutron spectrometry in pulsed and very intense (n-γ) fields with predominant photon component, as those produced by high energy (>10 MV) medical linear electron accelerators. In this paper, a description of the new system is presented together with an experimental characterisation of a portable Sodium Iodide (NaI) detector and a fixed high-purity Germanium one, both used to measure the induced γ-activity of the activated materials, respectively, in situ and in the laboratory. The choice of the activated materials is justified according to pre-established practical considerations and physical criteria. The response functions of the entire passive BSS were calculated using the MCNPX code. A preliminary experimental validation with a bare 252Cf source is given as well. © The Author 2007. Published by Oxford University Press. All rights reserved.
Original languageEnglish
Pages (from-to)337-341
JournalRadiation Protection Dosimetry
Volume126
Issue number1-4
DOIs
Publication statusPublished - 1 Dec 2007

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