Results 21 to 30 of about 44,774 (227)

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

Soil 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, Michele Cassetta, Danilo Oliveira de Souza, Gino Mariotto, Giuliana Aquilanti, Claudio Zaccone   +5 more
doaj   +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

AIP 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, Zhebin Wang, Jiyan Zhang, Quanxi Xue, Qing Ye, Shaoen Jiang   +5 more
doaj   +1 more source

Computational prediction of L_{3} EXAFS spectra of gold nanoparticles from classical molecular dynamics simulations

, 2011
We present a computational approach for the simulation of extended x-ray absorption fine structure (EXAFS) spectra of nanoparticles directly from molecular dynamics simulations without fitting any of the structural parameters of the nanoparticle to ...
Comaschi, Tatiana, Price, Stephen W.T., Roscioni, Otello Maria, Russell, Andrea E., Skylaris, Chris-Kriton, Zonias, Nicholas   +5 more
core   +1 more source

EXAFS study of nickel exchanged into zeolite Y [PDF]

, 1986
EXAFS and near edge spectroscopy were used to monitor changes i n Ni coordination as a function of treatment conditions after aqueous exchange into zeolite Y.
Bein, Thomas, Chester, A., Kuehl, G., Sayers, D. E., Stucky, Galen D., Woolery, G.   +5 more
core   +1 more source

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

Cogent 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

Physical 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, Malte Selig, Jens Biegert, Andreas Knorr   +3 more
doaj   +1 more source

Is There a Negative Thermal Expansion in Supported Metal Nanoparticles? An In-Situ X-ray Absorption Study Coupled with Neural Network Analysis

, 2019
Interactions with their support, adsorbates and unique structural motifs are responsible for the many intriguing properties and potential applications of supported metal nanoparticles (NPs).
Ahmadi, M., Roldan Cuenya, B., Timoshenko, J.   +2 more
core   +1 more source

Theoretical investigation of thermal disorder in CuCo alloys

Results in Physics, 2020
In this work, we investigate thermal disorder in intermetallic CuCo alloys by extending the anharmonic correlated Einstein model in extended X-ray absorption fine structure (EXAFS) theory.
Pham Thi Minh Hanh, Nguyen Ba Duc, Nguyen Van Nghia, Nguyen Viet Tuyen, Ho Khac Hieu   +4 more
doaj   +1 more source

Deconvolution problems in x-ray absorption fine structure [PDF]

, 2001
A Bayesian method application to the deconvolution of EXAFS spectra is considered. It is shown that for purposes of EXAFS spectroscopy, from the infinitely large number of Bayesian solutions it is possible to determine an optimal range of solutions, any ...
Babanov Yu A, Filipponi A, K V Klementev, Klementev K V, Klementev K V, Krause M O, Newville M, Press W H, Sánchez del Río M, Turchin V F   +9 more
core   +2 more sources

In-situ EXAFS study on the thermal decomposition of TiH2

, 2013
Thermal decomposition behaviors of TiH2 powder under a flowing helium atmosphere and in a low vacuum condition have been studied by using in-situ EXAFS technique.
An, Peng-Fei, Chu, Sheng-Qi, Hu, Tian-Dou, Wu, Min, Zhang, Jing, Zheng, Li-Rong, Zhou, Ying-Li   +6 more
core   +1 more source