The use of selected neutron absorption resonance filters to suppress spurious events on hot neutron spectrometers
| Autor: | J. R. Stewart, R. A. Ewings, M. Jimenez-Ruiz, Henrik M. Rønnow, D. Lançon |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Bonner sphere Nuclear and High Energy Physics Neutron resonance filter Neutron absorption cross-section 010308 nuclear & particles physics Neutron stimulated emission computed tomography Neutron scattering 01 natural sciences Neutron spectroscopy Neutron capture Nuclear magnetic resonance Hot neutron spectroscopy 0103 physical sciences Neutron cross section Neutron detection Neutron Atomic physics 010306 general physics Nuclear Experiment Instrumentation |
| Zdroj: | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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