scholarly journals An interferometric determination of the refractive part of optical constants for carbon and silver across soft x-ray absorption edges

1999 ◽  
Vol 70 (7) ◽  
pp. 2921-2926 ◽  
Author(s):  
Denis Joyeux ◽  
François Polack ◽  
Daniel Phalippou
Keyword(s):  
Optical Constants ◽  
X Ray ◽  
X Ray Absorption ◽  
Absorption Edges

Determination of Interatomic Distances from X-Ray Absorption Fine Structure

1965 ◽  
Vol 9 ◽  
pp. 398-409 ◽  
Author(s):  
F. W. Lytle
Keyword(s):  
Fine Structure ◽  
High Energy ◽  
Quantitative Agreement ◽  
Applied Theory ◽  
Interatomic Distances ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption ◽  
Absorption Edges

AbstractA pragmatic, easily applied theory of the extended X-ray absorption fine structure found on the high-energy side of absorption edges is developed. This simple model can be successfully applied to determinations of interatomic distances, and it accounts for differences in Kronig structure on different absorption edges in the same material. Quantitative agreement with experimental data is good.

DETERMINATION OF FERRIC-FERROUS RATIO IN PYROXENES WITH X-RAY ABSORPTION SPECTROSCOPY

2018 ◽  
Author(s):  
Cody J. Steven ◽  
◽  
M. Darby Dyar ◽  
Molly C. McCanta
Keyword(s):  
Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Absorption

scholarly journals Al-driven peculiarities of local coordination and magnetic properties in single-phase Alx-CrFeCoNi high-entropy alloys

Nano Research ◽  
2021 ◽  
Author(s):  
Alevtina Smekhova ◽  
Alexei Kuzmin ◽  
Konrad Siemensmeyer ◽  
Chen Luo ◽  
Kai Chen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Phase ◽  
Magnetic Circular Dichroism ◽  
Surface Region ◽  
Face Centered Cubic ◽  
X Rays ◽  
X Ray ◽  
High Entropy ◽  
X Ray Absorption ◽  
Absorption Edges

AbstractModern design of superior multi-functional alloys composed of several principal components requires in-depth studies of their local structure for developing desired macroscopic properties. Herein, peculiarities of atomic arrangements on the local scale and electronic states of constituent elements in the single-phase face-centered cubic (fcc)- and body-centered cubic (bcc)-structured high-entropy Alx-CrFeCoNi alloys (x = 0.3 and 3, respectively) are explored by element-specific X-ray absorption spectroscopy in hard and soft X-ray energy ranges. Simulations based on the reverse Monte Carlo approach allow to perform a simultaneous fit of extended X-ray absorption fine structure spectra recorded at K absorption edges of each 3d constituent and to reconstruct the local environment within the first coordination shells of absorbers with high precision. The revealed unimodal and bimodal distributions of all five elements are in agreement with structure-dependent magnetic properties of studied alloys probed by magnetometry. A degree of surface atoms oxidation uncovered by soft X-rays suggests different kinetics of oxide formation for each type of constituents and has to be taken into account. X-ray magnetic circular dichroism technique employed at L2.3 absorption edges of transition metals demonstrates reduced magnetic moments of 3d metal constituents in the sub-surface region of in situ cleaned fcc-structured Al0.3-CrFeCoNi compared to their bulk values. Extended to nanostructured versions of multicomponent alloys, such studies would bring new insights related to effects of high entropy mixing on low dimensions.

X-RAY ABSORPTION EDGES OF TRANSITION- METAL-DOPED Y1Ba2Cu3−xMxO7−∂

1988 ◽  
Vol 02 (05) ◽  
pp. 1153-1156 ◽  
Author(s):  
J. B. BOYCE ◽  
F. BRIDGES ◽  
T. CLAESON ◽  
T. H. GEBALLE ◽  
M. NYGREN ◽  
...  
Keyword(s):  
Transition Metal ◽  
X Ray ◽  
Metal Doped ◽  
X Ray Absorption ◽  
Absorption Edges

scholarly journals Determination of Chemical Form of Antimony in Contaminated Soil around a Smelter Using X-ray Absorption Fine Structure

2005 ◽  
Vol 21 (7) ◽  
pp. 769-773 ◽  
Author(s):  
Masaki TAKAOKA ◽  
Satoshi FUKUTANI ◽  
Takashi YAMAMOTO ◽  
Masato HORIUCHI ◽  
Naoya SATTA ◽  
...  
Keyword(s):  
Fine Structure ◽  
Contaminated Soil ◽  
Chemical Form ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

scholarly journals L-edge X-ray Absorption Spectroscopy of Non-Heme Iron Sites:  Experimental Determination of Differential Orbital Covalency

2003 ◽  
Vol 125 (42) ◽  
pp. 12894-12906 ◽  
Author(s):  
Erik C. Wasinger ◽  
Frank M. F. de Groot ◽  
Britt Hedman ◽  
Keith O. Hodgson ◽  
Edward I. Solomon
Keyword(s):  
Experimental Determination ◽  
Absorption Spectroscopy ◽  
Heme Iron ◽  
X Ray ◽  
Non Heme Iron ◽  
X Ray Absorption
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