Results 221 to 230 of about 12,386 (281)
XAFCA: a new XAFS beamline for catalysis research
Journal of Synchrotron Radiation, 2015 Yonghua Du, Shibo Xi, H O Moser
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Molecular Dynamics Simulations and XAFS (MD-XAFS)
2016MD-XAFS (Molecular Dynamics X-ray Adsorption Fine Structure) makes the connection between simulation techniques that generate an ensemble of molecular configurations and the direct signal observed from X-ray measurement. Due to the fact that the signal is most sensitive to the structure nearest to a photoelectron source, an understanding of XAFS signal
Gregory K. Schenter, John L. Fulton
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Operando XAFS Imaging of Distribution of Pt Cathode Catalysts in PEFC MEA.
The chemical record, 2018Three-dimensional imaging using X-ray as a probe is state-of-the-art for the characterization of heterogeneous materials. In addition to simple imaging of sample morphology, imaging of elemental distribution and chemical states provides advanced maps of ...
H. Matsui +7 more
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XAFS in dilute magnetic semiconductors
Dalton Transactions, 2013X-Ray absorption fine structure (XAFS) spectroscopy has experienced a rapid development in the last four decades and has proved to be a powerful structure characterization technique in the study of local environments in condensed matter. In this article, we first introduce the XAFS basic principles including theory, data analysis and experiment in some
Zhihu, Sun +5 more
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Physica B: Condensed Matter, 1989
Abstract The transferability concept is central to all practical applications of XAFS for structure determination, both experimental and theoretical. In this paper the question of transferability in EXAFS is re-examines. Physical arguments ndicate that transferability is much less accurate for multiple scattering than for single scattering. Therefore
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Abstract The transferability concept is central to all practical applications of XAFS for structure determination, both experimental and theoretical. In this paper the question of transferability in EXAFS is re-examines. Physical arguments ndicate that transferability is much less accurate for multiple scattering than for single scattering. Therefore
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Japanese Journal of Applied Physics, 1993
The ultimate information content of XAFS is discussed. The practical limits for obtaining this information are indicated. The most general case is considered where nothing is known about the structure and there is no orientation dependence of the XAFS with respect to the sample.
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The ultimate information content of XAFS is discussed. The practical limits for obtaining this information are indicated. The most general case is considered where nothing is known about the structure and there is no orientation dependence of the XAFS with respect to the sample.
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A novel SAXS/XRD/XAFS combined technique for in-situ time-resolved simultaneous measurements
Nano Reseach, 2022Zhonghua Wu +11 more
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Physica B: Condensed Matter, 1995
Abstract X-ray-absorption near edge structure (XANES) poses many theoretical challenges and a general quantitative theory remains elusive. We have studied structural contributions to XANES based on high-order multiple-scattering (MS) calculations, including X-ray polarization. Ab initio MS calculations of XANES are presented using a code FEFF6X, that
J.J. Rehr +3 more
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Abstract X-ray-absorption near edge structure (XANES) poses many theoretical challenges and a general quantitative theory remains elusive. We have studied structural contributions to XANES based on high-order multiple-scattering (MS) calculations, including X-ray polarization. Ab initio MS calculations of XANES are presented using a code FEFF6X, that
J.J. Rehr +3 more
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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1992
Abstract X-ray absorption fine structure (XAFS) spectroscopy is element specific, enabling individual pair distribution functions to be extracted for complex materials. Theoretical advances in multiple scattering have lead to a complete description of both near edge structure and extended fine structure (EXAFS). As a result, the radii and occupancies
B.R. Dobson, G.N. Greaves
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Abstract X-ray absorption fine structure (XAFS) spectroscopy is element specific, enabling individual pair distribution functions to be extracted for complex materials. Theoretical advances in multiple scattering have lead to a complete description of both near edge structure and extended fine structure (EXAFS). As a result, the radii and occupancies
B.R. Dobson, G.N. Greaves
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