Multiple Scattering Calculations Applied to XAS: A Structure and Electronic Sensitive Tool

1991 ◽  
Vol 253 ◽  
Author(s):  
Philippe Sainctavit ◽  
J. Petiau
Keyword(s):  
Multiple Scattering ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Scattering Theory ◽  
Spectral Features ◽  
Absorption Cross ◽  
Multiple Scattering Theory ◽  
X Ray ◽  
Sensitive Tool ◽  
X Ray Absorption

ABSTRACTWe present an application of multiple scattering theory with “muffin-tin” potentials to the calculation of X-ray absorption cross section. We have measured and calculated the K-edge spectra of atoms in compounds with zincblende structure : SiC, ZnS. We show that some spectral features can be precisely related to the local environnement around the absorbing atom.

scholarly journals Anisotropy of X-ray Absorption Cross Section in CeCoGe3 Single Crystal

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 544
Author(s):  
Andrei Rogalev ◽  
Fabrice Wilhelm ◽  
Elena Ovchinnikova ◽  
Aydar Enikeev ◽  
Roman Bakonin ◽  
...  
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Linear Dichroism ◽  
X Rays ◽  
Absorption Cross ◽  
X Ray ◽  
Measured Absorption ◽  
Linearly Polarized ◽  
X Ray Absorption ◽  
Absorption Edges

Absorption spectra of two orthogonal linearly polarized x-rays in a single CeCoGe3 crystal were measured at the ID12 beamline of the ESRF for the energies near the K-edges of Ge, Co and near the L23 edges of Ce. The X-ray natural linear dichroism (XNLD) was revealed in the vicinity of all the absorption edges, which indicates a splitting of electronic states in a crystalline field. Mathematical modelling in comparison with experimental data allowed the isotropic and anisotropic parts of atomic absorption cross section in CeCoGe3 to be determined near all measured absorption edges. The calculations also show that the “average” anisotropy of the cross section close to the Ge K-edge revealed in the experiment is less than the partial anisotropic contributions corresponding to Ge atoms in two different Wyckoff positions.

X -Ray Absorption Near Edge Structure (XANES) Calculations for the Amorphous Fe80B20- and Ni80B20-Alloys

1989 ◽  
Vol 44 (3) ◽  
pp. 189-194
Author(s):  
P. Kizler ◽  
P. Lamparter ◽  
S. Steeb
Keyword(s):  
Multiple Scattering ◽  
Scattering Theory ◽  
Edge Structure ◽  
Multiple Scattering Theory ◽  
X Ray ◽  
Bond Angles ◽  
Complex Features ◽  
X Ray Absorption ◽  
Good Agreement

Xanes spectra of the amorphous Fe80B20- and Ni80B20-alloys have been investigated using the electron multiple scattering theory of Durham et al. The calculations were based on several models for the structure of amorphous Fe80B20 and Ni80B20. Very good agreement between theoretical and experimental XANES curves was met. Opposite to former expectations for obtaining information on bond angles by XANES, this study shows that XANES points to more complex features of the structure than can be expressed in terms of bond angles.

Br K-Edge X-ray Absorption Near Edge Structure Analyses of Bromine Residue Carbon Compounds Using Full Multiple-Scattering Theory

2005 ◽  
Vol 44 (6A) ◽  
pp. 4073-4079 ◽  
Author(s):  
Kanae Uno ◽  
Yasuharu Notoya ◽  
Takashi Fujikawa ◽  
Hidetaka Yoshikawa ◽  
Keiko Nishikawa
Keyword(s):  
Multiple Scattering ◽  
Scattering Theory ◽  
Edge Structure ◽  
Multiple Scattering Theory ◽  
X Ray ◽  
Carbon Compounds ◽  
X Ray Absorption

Fluorescence yield detection: Why it does not measure the X-ray absorption cross section

1994 ◽  
Vol 92 (12) ◽  
pp. 991-995 ◽  
Author(s):  
F.M.F. de Groot ◽  
M.A. Arrio ◽  
Ph. Sainctavit ◽  
Ch. Cartier ◽  
C.T. Chen
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Fluorescence Yield ◽  
Absorption Cross ◽  
X Ray ◽  
X Ray Absorption
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