Area normalization of HERFD-XANES spectra.
Luca Bugarin1, Hugo Alexander Suarez Orduz1, Pieter Glatzel1
1ESRF - The European Synchrotron, 71 Avenue des Martyers, 38000 Grenoble, France.
Journal of Synchrotron Radiation
|August 6, 2024
Summary
Spectral normalization methods, including edge-jump and spectral area normalization, are crucial for X-ray absorption near-edge structure (XANES) analysis. Normalization to the spectral area is a viable alternative when data acquisition is limited, provided a sufficient energy range is used.
Area of Science:
- Materials Science
- Analytical Chemistry
- Spectroscopy
Background:
- X-ray absorption near-edge structure (XANES) spectra require normalization for quantitative analysis using techniques like linear combination analysis.
- Common normalization methods include edge-jump normalization and spectral area normalization.
- Spectral area normalization is advantageous for limited spectral ranges.
Purpose of the Study:
- To compare the effectiveness of edge-jump versus spectral area normalization for XANES spectra.
- To evaluate the viability of spectral area normalization under conditions of limited spectral data.
Main Methods:
- Comparison of experimental and calculated XANES spectra.
- Analysis of L3-edge spectra for Platinum (Pt), Palladium (Pd), and Rhodium (Rh).
- Analysis of K-edge spectra for Nickel (Ni).
Main Results:
- Normalization to the spectral area is a valid approach for XANES spectra.
- The success of spectral area normalization depends on utilizing a sufficiently large energy range.
- Both normalization methods were evaluated across different elements and absorption edges.
Conclusions:
- Spectral area normalization offers a practical alternative to edge-jump normalization for XANES analysis.
- Careful selection of the energy range is critical for the successful implementation of spectral area normalization.
- This study validates spectral area normalization for quantitative XANES analysis in specific scenarios.
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