About: Analytical model for neutron diffraction peak shifts due to the surface effect

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About: Analytical model for neutron diffraction peak shifts due to the surface effect Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Residual strains measured by neutron diffraction near sample boundaries can be biased by the surface effect as a result of incomplete filling of the instrumental gauge volume. This effect is manifested as anomalous shifts of diffraction lines, which can be falsely interpreted as a lattice strain unless appropriate data corrections are made. A new analytical model for the surface effect has been developed, which covers a broad variety of instrumental arrangements, including flat mosaic and bent perfect crystal monochromators, narrow slits, and Soller and radial collimators. This model permits the spurious peak shifts to be predicted quantitatively, and also allows the optimum configuration parameters, such as curvature of a focusing monochromator, which lead to suppression of the surface effect, to be calculated. The model has been thoroughly validated by comparisons with Monte Carlo simulations and experiments on a stress-free calibration sample. Predictions of the model proved to be very accurate, often within the interval of experimental errors, which makes it suitable for use in data analysis. Residual strains measured by neutron diffraction near sample boundaries can be biased by the surface effect as a result of incomplete filling of the instrumental gauge volume. This effect is manifested as anomalous shifts of diffraction lines, which can be falsely interpreted as a lattice strain unless appropriate data corrections are made. A new analytical model for the surface effect has been developed, which covers a broad variety of instrumental arrangements, including flat mosaic and bent perfect crystal monochromators, narrow slits, and Soller and radial collimators. This model permits the spurious peak shifts to be predicted quantitatively, and also allows the optimum configuration parameters, such as curvature of a focusing monochromator, which lead to suppression of the surface effect, to be calculated. The model has been thoroughly validated by comparisons with Monte Carlo simulations and experiments on a stress-free calibration sample. Predictions of the model proved to be very accurate, often within the interval of experimental errors, which makes it suitable for use in data analysis. (en)
Title	Analytical model for neutron diffraction peak shifts due to the surface effect Analytical model for neutron diffraction peak shifts due to the surface effect (en)
skos:prefLabel	Analytical model for neutron diffraction peak shifts due to the surface effect Analytical model for neutron diffraction peak shifts due to the surface effect (en)
skos:notation	RIV/61389005:_____/13:00393349!RIV14-AV0-61389005
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP204/10/0654)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Šaroun, Jan Vrána, Miroslav Mikula, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	60773
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/13:00393349
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	residual-stress; neutron diffraction; Monte Carlo simulation (en)
http://linked.open.../riv/klicoveSlovo	residual-stress Monte Carlo simulation neutron diffraction
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[68F106E822C1]
http://linked.open...i/riv/nazevZdroje	Journal of Applied Crystallography
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Monte Carlo simulations of complex neutron optics systems
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	46
http://linked.open...iv/tvurceVysledku	Šaroun, Jan Mikula, Pavol Vrána, Miroslav Hofmann, M. Kornmeier, J. R.
http://linked.open...ain/vavai/riv/wos	000318943300006
issn	0021-8898
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1107/S0021889813008194

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