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Graphite intercalat...
Graphite intercalation compound (GIC) crystal monochromators for cold neutron instruments : Characterization of KC24 by time-of-flight neutron diffraction
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- Dennison, Andrew J. C. (author)
- Uppsala universitet,Institutionen för fysik och astronomi,Inst Laue Langevin, 71 Rue Martyrs, F-38000 Grenoble, France.;Univ Sheffield, Dept Phys & Astron, Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England.
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- Devishvili, Anton (author)
- Uppsala universitet,Institutionen för fysik och astronomi,Inst Laue Langevin, 71 Rue Martyrs, F-38000 Grenoble, France.
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- Gutfreund, Philipp (author)
- Inst Laue Langevin, 71 Rue Martyrs, F-38000 Grenoble, France.
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- Cubitt, Robert (author)
- Inst Laue Langevin, 71 Rue Martyrs, F-38000 Grenoble, France.
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- Vorobiev, Alexei (author)
- Uppsala universitet,Materialfysik,Inst Laue Langevin, 71 Rue Martyrs, F-38000 Grenoble, France.
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- Zabel, Hartmut (author)
- Ruhr Univ Bochum, Dept Phys & Astron, D-44780 Bochum, Germany.
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- Wolff, Max (author)
- Uppsala universitet,Materialfysik,Natl Res Nucl Univ MEPhI, Dept Mat Sci, Kashirskoe Shosse 31, Moscow 115409, Russia.;Uppsala Univ, Ctr Neutron Scattering, POB 516, S-75120 Uppsala, Sweden.
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(creator_code:org_t)
- American Institute of Physics (AIP), 2021
- 2021
- English.
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In: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 92:2
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Graphite intercalation compounds (GICs) are a group of layered materials that are suitable as monochromators for cold neutrons. KC24 is a particularly interesting compound in this regard as it features a large c-axis lattice spacing of 8.74 angstrom, high reflectivity, and the possibility to produce large crystals with mosaicity that matches the beam divergence of cold neutron guides. GICs can be synthesized with different levels of intercalation, known as the stage of the compounds. Each stage displays a specific d-spacing. Impure GIC-monochromators containing multiple stages produce mixing of neutron wavelengths, which complicates data analysis on neutron reflectometers. We discuss the implications of GIC crystal purity and stage contamination for neutron reflectometry and show how GIC crystals can be characterized by time-of-flight neutron diffraction providing an efficient and quantifiable measure of the reflected wavelength spectrum. This allows taking into account multiple wavelength contaminations and ascertains the robustness of reflectometry measurements.
Subject headings
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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