Results 211 to 220 of about 3,689 (252)
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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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Reviews in Mineralogy and Geochemistry, 2014
The basic physical principles of X-ray Absorption Fine-Structure (XAFS) are presented. XAFS is an element-specific spectroscopy in which measurements are made by tuning the X-ray energy at and above a selected core-level binding energy of a specified element.
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The basic physical principles of X-ray Absorption Fine-Structure (XAFS) are presented. XAFS is an element-specific spectroscopy in which measurements are made by tuning the X-ray energy at and above a selected core-level binding energy of a specified element.
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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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XAFS for Characterization of Nanomaterials
2016X-ray absorption fine structure (XAFS) spectroscopy studies the modification of the X-ray absorption coefficient, above the absorption edge of a specific element, due to the presence of neighboring atoms and delivers information on materials nano- and electronic structure.
Maria Katsikini, Eleni C. Paloura
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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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2010
X-ray absorption fine structure spectroscopy (XAFS) is a powerful and versatile technique for studying structures of materials in chemistry, physics, biology and other fields. This textbook is a comprehensive, practical guide to carrying out and interpreting XAFS experiments.
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X-ray absorption fine structure spectroscopy (XAFS) is a powerful and versatile technique for studying structures of materials in chemistry, physics, biology and other fields. This textbook is a comprehensive, practical guide to carrying out and interpreting XAFS experiments.
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SPIE Proceedings, 1986
Refinements in the theory of XAFS (x-ray absorption fine structure) are discussed. These include spherical wave corrections and multiple scattering contributions. The conventional theory, with these refinements included, can be recovered using effective scattering amplitudes, appropriate Debye-Waller factors, and many-body amplitude reduction factors.
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Refinements in the theory of XAFS (x-ray absorption fine structure) are discussed. These include spherical wave corrections and multiple scattering contributions. The conventional theory, with these refinements included, can be recovered using effective scattering amplitudes, appropriate Debye-Waller factors, and many-body amplitude reduction factors.
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Applications of XAFS to Nanostructures and Materials Science
2014I will firstly illustrate the role and the characteristics of XAFS as a probe of the local structure in materials and nano science. I will then provide a brief review of the use of the method in these fields, basing the discussion both on results which have stood the test of time and recent papers.
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