Determination of total x-ray absorption coefficient using non-resonant x-ray emission.

Scientific Reports
A J AchkarD G Hawthorn

Abstract

An alternative measure of x-ray absorption spectroscopy (XAS) called inverse partial fluorescence yield (IPFY) has recently been developed that is both bulk sensitive and free of saturation effects. Here we show that the angle dependence of IPFY can provide a measure directly proportional to the total x-ray absorption coefficient, µ(E). In contrast, fluorescence yield (FY) and electron yield (EY) spectra are offset and/or distorted from µ(E) by an unknown and difficult to measure amount. Moreover, our measurement can determine µ(E) in absolute units with no free parameters by scaling to µ(E) at the non-resonant emission energy. We demonstrate this technique with measurements on NiO and NdGaO(3). Determining µ(E) across edge-steps enables the use of XAS as a non-destructive measure of material composition. In NdGaO(3), we also demonstrate the utility of IPFY for insulating samples, where neither EY or FY provide reliable spectra due to sample charging and self-absorption effects, respectively.

References

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Citations

Apr 22, 2016·The Journal of Physical Chemistry. a·Ronny GolnakEmad F Aziz
Apr 25, 2017·The Journal of Physical Chemistry Letters·Daniela SchönEmad F Aziz
Feb 26, 2016·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Mohammad Attarian ShandizRaynald Gauvin
May 15, 2020·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Samantha RudinskyRaynald Gauvin
Sep 5, 2012·Chemistry, an Asian Journal·Kathrin M Lange, Emad F Aziz
Aug 15, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·S Macke, E Goering
Feb 10, 2019·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Yi-Sheng LiuJinghua Guo
Jun 1, 2013·Chemical Society Reviews·Kathrin M Lange, Emad F Aziz
Nov 7, 2019·Proceedings of the National Academy of Sciences of the United States of America·Hao WangJohn B Goodenough
Apr 5, 2017·The Review of Scientific Instruments·Ruimin QiaoWanli Yang
Oct 6, 2017·The Journal of Physical Chemistry Letters·Daniela SchönJie Xiao

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Methods Mentioned

BETA
X-ray
atomic scattering

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