spectroscopie d'absorption X (EXAFS
Etude structurale de complexes de cuivre par diffraction et spectroscopie d'absorption X (EXAFS et XANES)
... Etude structurale de complexes de cuivre par diffraction et spectroscopie d'absorption X (EXAFS et XANES).. Authors[r] ...
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Spectroscopie d'absorption X résolue en temps pour l'étude de la matière dense et tiède
... source X de large bande spectrale, créée par un laser kHz, permet de mesurer un spectre d’absorption X dont les fluctuations du bruit varient entre 1% et 4‰ du signal mesuré, avec une accumulation des ...
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Etude par spectroscopie X en condition de diffraction de la croissance et de l'encapsulation de boites quantiques GaN/AlN
... (Extended X-ray Absorption Fine Structure, EXAFS), en 1920, par ...signal EXAFS [Sayers ...une spectroscopie quantitative pour l’analyse de l’environnement local d’un atome ...
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Pépite | Identification des sites acides de Lewis des zéolithes Beta et Mordénite par modélisation et spectroscopie d’absorption de rayons X et Infrarouge
... La spectroscopie XANES (X-ray Absorption Near Edge Structure) est une technique spectroscopique spécifique d’un élément chimique donné, appelé atome absorbeur (dans notre cas ...photons X ...
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Effets photo-induits coopératifs: du photomagnétisme sous irradiation continue aux phénomènes ultrarapides- étude par spectroscopie et diffraction X.
... diffraction X ultrarapide des potentiels thermodynamiques mais à des potentiels dynamiques et les termes de densité, qu’ils soient totalement symétriques ou associées à une brisure de symétrie, deviennent ...
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Full potential x-ray absorption calculations using the time dependent density functional theory
... In this article we focus on time dependent density functional theory (TDDFT) [6] as an alternative to BSE for calculations of core spectroscopy. TDDFT introduces a framework particularly suitable for spectroscopy ...
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X-Ray Absorption Spectroscopy and Anomalous Wide Angle X-Ray Scattering: Two Basic Tools in the Analysis of Heterogeneous Catalysts
... classical EXAFS based on hard X-ray photons. Moreover, since X-ray absorption spectra can also be collected at the K edge of light elements, the adsorption process of molecules of major ...
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High-Resolution Near-Edge X-ray Absorption Fine Structure Study of Condensed Polyacenes
... 35. Zheng, J.; Xu, X.; Truhlar, D. G., Minimally augmented Karlsruhe basis sets. Theor Chem Acc 2010, 128 (3), 295-305. 36. Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Scuseria, G. E.; Robb, M. A.; Cheeseman, ...
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White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy
... the x-ray path. The alignment of the x-ray beam and the laser beam was performed in two steps, using high-magnification microscopes located on both sides of the ...the x-ray beam was aligned on a ...
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Revisiting the Sodiation Mechanism of TiO 2 via Operando X-ray Absorption Spectroscopy
... applied X-ray diffraction (XRD) has proven to be insufficient to closely follow the reaction mechanism, due to the loss of long-range order upon first ...Na x TiO 2 phase appears to form in the initial ...
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Single-shot time-resolved magnetic x-ray absorption at a free-electron laser
... based x-ray streaking technique, which overcomes this limitation by sampling the relaxation dynamics with a single femtosecond x-ray pulse streaked over a picosecond long time ...the x-ray ...
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Operando investigation of the lithium/sulfur battery system by coupled X-ray absorption tomography and X-ray diffraction computed tomography
... higher absorption (red) corresponds to sulfur particles, which are distributed randomly in the electrode (with a less dense region on the right side probably due to electrode damage during cell ...
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Confirmation of X-ray Absorption by Warm-hot Intergalactic Medium in the Sculptor Wall
... an absorption line from the warm-hot intergalactic medium (WHIM) using the Chandra and XMM X-ray grating spectra of the blazar H2356-309, the sight line of which intercepts the Sculptor Wall, a large-scale ...
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Co/Ni(111) superlattices studied by microscopy, x-ray absorption, and ab initio calculations
... III. Co /Ni(111)-SPUTTERED SAMPLES To compare with the MBE samples, a series of samples were prepared by dc magnetron sputtering with a base pressure of 5 × 10 −9 Torr. The samples were deposited on Si(100) substrates at ...
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A computational study on the X-ray absorption spectrum of proton-ordered crystalline ice IX
... be neglected and must be taken into account in the calculation of the ice cluster XAS. Apart from changes in the shape of the overall absorption spectra, the Madelung potential has a drastic effect on the orbital ...
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Zn speciation in the organic horizon of a contaminated soil by micro X-ray fluorescence, micro and powder EXAFS spectroscopy and isotopic dilution.
... EXAFS (Extended X-Ray Absorption Fine Structure) spectroscopy is a tool of choice for probing the local environment of Zn in soils and sediments ...the EXAFS signal from organic and ...
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Structure of nanocrystalline calcium silicate hydrates: insights from X-ray diffraction, synchrotron X-ray absorption and nuclear magnetic resonance
... Geology, Research Group of Geoenvironmental/Engineering Division of Solid Waste, Resources and Geoenvironmental/ Engineering Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Sapporo, Japan, and d ...
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EXAFS Characterization of New Active Phases for Catalytic Hydrotreatment: Two Cations Disulfide Layers in the MoxW(1-x)S2 Lamellar Solid Solution
... Coming back to the Mo K-edge, refinement of the EXAFS spectrum of MoS 2 /Al 2 O 3 (Table 5) shows that the cationic in-plane environment of molybdenum contains only molybdenum, as expected. However, the refined ...
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Insights on Fission Products behaviour in Nuclear Severe Accident Conditions by X-ray Absorption Spectroscopy
... 3.3.2. X-ray Absorption Spectroscopy Due to its ability to reveal information at the molecular level such as coordination geometry and oxidation states, X-ray Absorption Spectroscopy (XAS) ...
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Electronic structure of thallium filled skutterudites studied by x-ray absorption and Mossbauer spectroscopy
... -edge x-ray absorption and iron-57 and tin-119 Mo¨ssbauer spectral measurements have been carried out to probe the electronic structure of the three sites in the filled skutterudite Tl x Co 4 ⫺y Fe y ...
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