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The use of selected neutron absorption resonance filters to suppress spurious events on hot neutron spectrometers

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Lancon D., Ewings R. A., Stewart J. R., Jimenez-Ruiz M., Ronnow H. M.,
Project Quantum Magnetism - Spinons, Skyrmions and Dipoles
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Original article (peer-reviewed)

Journal NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume (Issue) 780
Page(s) 9 - 14
Title of proceedings NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
DOI 10.1016/j.nima.2014.12.114

Open Access

URL https://infoscience.epfl.ch/record/207261?ln=en
Type of Open Access Repository (Green Open Access)

Abstract

Resonant absorption can be used as a filter for high energy neutron spectroscopy. Here we report the transmission of eight thin foil filters: erbium, indium, iridium, dysprosium, hafnium, gadolinium, cadmium and samarium, measured using neutron time-of-flight techniques over a range of energies (1 meV to 10 eV). Measured transmission is converted into energy-dependent absorption cross-section which compares closely to tabulated values. Each resonance is characterized from 91 meV (samarium) to 2815 meV (gadolinium) by Lorentzian fits. Possibilities for the use of neutron filters depending on the type of spurious background are discussed and the performance is simulated for a specific example of a hot neutron triple axis spectrometer experiment. (C) 2015 Elsevier B.V. All rights reserved.
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