Temperature Dependence of Extended X-Ray Absorption Fine Structure of CuBr^-_2:Dynamical Effect of the Scattering Amplitude

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概要

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• We observed a noticeable dynamical effect of the scattering amplitude in Br K-edge extendedX-ray-absorption fine structure (EXAFS) spectra of linear triatomic CuBr.7 . The conventionalstatic treatment of the scattering amplitude was found to give appropriate thermal damping forthe first-nearest neighbor (NN) Br -Cu shell, while it showed fatal discrepancy for the second-NNBr -Br' shell which contains strong multiple-scattering paths due to the collinear arrangement.We have thus employed the dynamical treatment of the scattering amplitude for the second-NNshell with the assumption of the harmonic oscillators. The thermal damping of the second-NNshell was estimated appropriately by taking the bending motions into account. The present studygives the first clear example for the dynamical effect of the scattering amplitude and indicatesthat great care should be taken in the analysis of higher-NN shells containing multiple-scatteringpaths.

• 社団法人日本物理学会の論文
• 1996-12-15

著者

• Yokoyama Toshihiko

  Department Of Chemistry Graduate School Of Science The University Of Tokyo

• Ohta Toshiaki

  Department Of Chemistry Faculty Of Science University Of Tokyo

• Ohta Toshiaki

  Department Of Chemistry Graduate School Of Science The University Of Tokyo

• YOKOHAMA Toshihiko

  Department of Chemistry,Graduate School of Science,The University of Tokyo

• Yokohama Toshihiko

  Department Of Chemistry Graduate School Of Science The University Of Tokyo

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