Iterative energy self-calibration of Fe XANES spectra
Date
2020
Authors
Jones, Michael W M
Mallmann, Guilherme
Wykes, Jeremy
Knafelc, Joseph
Bryan, Scott
Howard, Daryl
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Publisher
Munksgaard International Publishers
Abstract
Determining the oxidation state of Fe through parameterization of X-ray absorption near-edge structure (XANES) spectral features is highly dependent on accurate and repeatable energy calibration between spectra. Small errors in
energy calibration can lead to vastly different interpretations. While simultaneous
measurement of a reference foil is often undertaken on X-ray spectroscopy beamlines, other beamlines measure XANES spectra without a reference foil and therefore lack a method for correcting energy drift. Here a method is proposed that combines two measures of Fe oxidation state taken
from different parts of the spectrum to iteratively correct for an unknown energy offset between spectra, showing successful iterative self-calibration not only during individual beam time but also across different beamlines.
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Journal of Synchrotron Radiation
Type
Journal article
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2037-12-31
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