Local structure information by EXAFS analysis using two algorithms for Fourier transform calculation
2009
The present work is a comparison study between different algorithms of Fourier transform for obtaining very accurate local structure results using Extended X-ray Absorption Fine Structure technique. In this paper we focus on the local structural characteristics of supported nickel catalysts and Fe3O4 core-shell nanocomposites. The radial distribution function could be efficiently calculated by the fast Fourier transform when the coordination shells are well separated while the Filon quadrature gave remarkable results for close-shell coordination.
Keywords:
- Short-time Fourier transform
- Constant Q transform
- Discrete-time Fourier transform
- Computational chemistry
- Discrete Fourier transform (general)
- Discrete Fourier transform
- Non-uniform discrete Fourier transform
- Fractional Fourier transform
- Cyclotomic fast Fourier transform
- Algorithm
- Analytical chemistry
- Chemistry
- Harmonic wavelet transform
- Fourier transform
- Correction
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