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XPS is used for surface chemical state identification. But other than that, is XAS just an inverse of XPS?

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You could easily google this...

X-ray photoelectron spectroscopy uses low energy monochromatic x-rays to excite electrons from atoms near the surface of a sample. The kinetic energy of the electrons is then measured and then the binding energy of the electrons can be calculated.

X-ray absorption spectroscopy measure the attenuation of a x-ray beam as a function of x-ray wavelength (or energy). So what you are detecting is the absorption edges of the atoms in the sample.

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  • $\begingroup$ @porphyrin - Yes. Thank you for the need for a correction. $\endgroup$
    – MaxW
    Commented Jun 23, 2018 at 14:03
  • $\begingroup$ But from the absorption edge, can we also calculate the binding energy? $\endgroup$
    – wangge
    Commented Jun 24, 2018 at 18:18
  • $\begingroup$ For inner electrons you can look binding energies in a table. You really don't need to measure them again. $\endgroup$
    – MaxW
    Commented Jun 24, 2018 at 18:36

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