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A New Interpretation of EXAFS Spectra in Real Space: II. A Comparison of the Regularization Technique with the Fourier Transformation Method
Author(s) -
Ershov N. V.,
Ageev A. L.,
Vasin V. V.,
Babanov Yu. A.
Publication year - 1981
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221080114
Subject(s) - fourier transform , extended x ray absorption fine structure , fourier analysis , transformation (genetics) , spectral line , regularization (linguistics) , copper , mathematical analysis , absorption spectroscopy , mathematics , computational physics , physics , analytical chemistry (journal) , chemistry , optics , computer science , quantum mechanics , chromatography , organic chemistry , artificial intelligence , biochemistry , gene
The errors in the initial EXAFS data are simulated numerically. The comparative sensitivity of the regular methods and of the Fourier transformation method to these errors is analyzed. The theoretically calculated normalized oscillating part of the absorption coefficient χ(k) for polycrystalline copper at T = 77.4 K is compared with the experimental spectrum obtained with the use of a synchrotron facility. The spectrum involved is processed using regular methods. A substantial improvement of the result in comparison with the Fourier method is shown.