Results 121 to 130 of about 167,718 (203)

Wavelet analysis of extended X-ray absorption fine structure data: Theory, application

Physica. B, Condensed matter, 2018
Fourier transform (FT) plays an indispensable role in the quantitative analysis of extended X-ray absorption fine structure (EXAFS). The fitting of FT-EXAFS has already solved many scientific issues.
Zhaoming Xia, Hao Zhang, Kongchao Shen, Y. Qu, Zheng Jiang   +4 more
semanticscholar   +1 more source

The Fine Structure of X-ray Absorption Edges

Nature, 1929
IT is well known that the edges of X-ray absorption spectra are very often accompanied by secondary edges on the short wave-length side. For this phenomenon the following explanation has been proposed (D. Coster, Zs. f. Phys., 25, 83; 1924: A. Sommerfeld, “Atombau”, fourth German edition, p. 326 ; 1924).
D. COSTER, M. WOLF
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Extended X-Ray Absorption Fine Structure

1986
Abstract This article provides an introduction to extended x-ray absorption fine structure (EXAFS). It describes the fundamentals of EXAFS with an emphasis on the physical mechanism, the single-scattering approximation, and multiple-scattering effects.
D. G. Stearns, M. B. Stearns
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Relativistic effects in the x-ray-absorption fine structure

Physical Review B, 1994
A relativistic model for the extended x-ray-absorption fine structure, in which the energy loss of the emitted photoelectron is accounted for by using a complex energy-dependent exchange-correlation potential, has been developed. Relativistic curved-wave single-, double-, and triple-scattering formulas for excitation from any core hole have been found.
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X-ray Absorption Fine Structure Techniques

Particulate Science and Technology, 2010
X-ray absorption fine structure spectroscopy (XAFS) is a unique probe for local atomic and electronic structure of absorbing centers in particulate science, physics, chemistry, and biology. During the past several decades, XAFS has gained dramatic advances in every aspect, including theoretical explanation and experimental applications. In this review,
Zhongrui Li, Enkeleda Dervishi, Viney Saini, Liqiu Zheng, Wensheng Yan, Shiqiang Wei, Yang Xu, Alexandru S. Biris   +7 more
openaire   +1 more source

A History of X-ray absorption fine structure

Annales de Physique, 1989
This historical account of X-ray absorption fine structure (XAFS) spectroscopy from the origin to 1975 begins with the first observations of X-ray absorption edges and the experimental setups used at the turn of the century. Then, the discovery of XAFS and Kossel's early interpretation are discussed.
openaire   +1 more source

The significance of fluorescence in transmission X‐ray absorption spectroscopy and X‐ray absorption fine structure

X-Ray Spectrometry, 2021
We present a method to explore the effect of fluorescence on X‐ray attenuation measurements obtained from X‐ray absorption spectroscopy (XAS). We use the X‐ray extended range technique‐like method (XERT‐like). The experimental setup includes different sized apertures to control the number of secondary X‐rays entering the detector.
Daniel Sier, Ruwini Supeshala Kumari Ekanayake, Christopher Thomas Chantler   +2 more
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X-ray Absorption Fine Structure in Glass

1963
When considering such things as electronic behavior or structure-dependent phenomena in solids (including glass), one is faced with the problem of finding ways to make measurements which yield information about events and mechanisms on a microscopic or atomic scale.
W. F. Nelson, I. Siegel, R. Wagner
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Comment on "X-ray-absorption fine structure in embedded atoms"

Physical Review B, 1996
We illustrate that the possible existence of an oscillatory atomic x-ray-absorption background (AXAFS) as reported by Rehr et al. [Phys. Rev. B 49, 12 347 (1994)] is so far not proven.
FILIPPONI, Adriano, A. DI CICCO
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X-ray absorption fine structure of artificial antigens for cadmium

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2011
Immunoassay technology as a quick and large-scale screening method to detect metal ions in foods and environmental samples has rapidly been developed due to several advantages over conventional instrument-intensive methods. Unlike biomacromolecule, metal ions are haptens without immunogenicity, so successful preparation of artificial antigens is the ...
Liang, Lu, Aiping, Liu, Fusheng, Chen, Xiaohong, Wang   +3 more
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