Results 21 to 30 of about 23,193 (311)

Effective coordination numbers from EXAFS: general approaches for lanthanide and actinide dioxides

open access: yesJournal of Synchrotron Radiation, 2022
Extended X-ray absorption fine structure (EXAFS) is a comprehensive and usable method for characterizing the structures of various materials, including radioactive and nuclear materials. Unceasing discussions about the interpretation of EXAFS results for
Anna Romanchuk   +6 more
doaj   +1 more source

Bayesian sparse modeling of extended x-ray absorption fine structure to determine interstitial oxygen positions in yttrium oxyhydride epitaxial thin film

open access: yesAIP Advances, 2021
This article presents a Bayesian sparse modeling method to analyze extended x-ray absorption fine structure (EXAFS) data with basis functions built on two-body signals.
Hiroyuki Kumazoe   +12 more
doaj   +1 more source

Probing the role of thermal vibrational disorder in the SPT of VO $$_2$$ 2 by Raman spectroscopy

open access: yesScientific Reports, 2021
Phase competition in transition metal oxides has attracted remarkable interest for fundamental aspects and technological applications. Here, we report a concurrent study of the phase transitions in undoped and Cr-doped VO $$_2$$ 2 thin films.
Aminat Oyiza Suleiman   +6 more
doaj   +1 more source

EDA: EXAFS data-analysis software package [PDF]

open access: yes, 2021
The EXAFS data-analysis software package EDA consists of a suite of programs running under a Windows operating system environment that is designed to perform all steps of conventional EXAFS data analysis such as extraction of the XANES/EXAFS parts of the
Alexei Kuzmin, Kuzmin, Alexei
core   +1 more source

Extended x-ray absorption fine structure measurement of ramp compressed Ti using laser-irradiated metallic foil as x-ray source on SGIII prototype laser facility

open access: yesAIP Advances, 2023
Laser-irradiated metallic foils were considered as x-ray sources for extended x-ray absorption fine structure (EXAFS) measurements and confirmed by experiments on the SGIII prototype facility.
Yun Hu   +5 more
doaj   +1 more source

Coupling X-ray Absorption and Raman Spectroscopies to Characterize Iron Species in a Karst Pedosedimentary Record

open access: yesSoil Systems, 2022
The identification of iron (Fe) forms throughout a sediment sequence was investigated by X-ray Absorption Near Edge Spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) at the Fe K-edge, paired with Raman micro-spectroscopy.
Beatrice Giannetta   +5 more
doaj   +1 more source

Investigation of temperature and pressure effects on thermodynamic parameters of intermetallic alloy in EXAFS

open access: yesCogent Engineering, 2020
This work advances the anharmonic correlated Einstein model to investigate how pressure and temperature affect the Debye–Waller factor and thermodynamic parameters of an intermetallic alloy. By using the anharmonic correlated Einstein model in extended X-
Nguyen Ba Duc
doaj   +1 more source

Theory of x-ray absorption spectroscopy: A microscopic Bloch equation approach for two-dimensional solid states

open access: yesPhysical Review Research, 2023
We develop a self-consistent Maxwell-Bloch formalism for the interaction of x-rays with two-dimensional crystalline materials by incorporating the Bloch theorem and Coulomb many-body interaction. This formalism is illustrated for graphene, by calculating
Dominik Christiansen   +3 more
doaj   +1 more source

Dimethyl sulfoxide solvates of the aluminium(III), gallium(III) and indium(III) ions. A crystallographic, EXAFS and vibrational spectroscopic study

open access: yes, 2003
The isostructural hexakis( dimethyl sulfoxide)-aluminium(III), -gallium(III) and -indium(III) iodides crystallise in the trigonal space group R(3) over bar ( no. 148), Z = 3, at 295 +/- 1 K.
Kritikos, M.   +3 more
core   +1 more source

Combining EXAFS and Computer Simulations to Refine the Structural Description of Actinyls in Water

open access: yesMolecules, 2020
EXAFS spectroscopy is one of the most used techniques to solve the structure of actinoid solutions. In this work a systematic analysis of the EXAFS spectra of four actinyl cations, [UO2]2+, [NpO2]2+, [NpO2]+ and [PuO2]2+ has been carried out by comparing
Sergio Pérez-Conesa   +3 more
doaj   +1 more source

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