Hi Cameron See Trevorah R et al. regarding correction for absorption and self-absorption; Yes it is probably still suitable for EXAFS analysis subject to other criteria and constraints. Also see Schalken M et al. for the comparison of transmission
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Hi Cameron
See Trevorah R et al. regarding correction for absorption and self-absorption;
Yes it is probably still suitable for EXAFS analysis subject to other criteria and constraints.
Also see Schalken M et al. for the comparison of transmission EXAFS (largely without self-absorption) versus angle-dependent fluorescence EXAFS (which almost always has self-absorption and absorption in an angle-dependent manner) and how to extract the data.
Note that fluorescence data has a functional which is not directly that of a transmission or absorption measurement.

Best wishes
Chris



--------------------------------------------------------------------------------------

Christopher Chantler, Professor, FAIP, Fellow American Physical Society

Editor-in-Chief, Radiation Physics and Chemistry

Member, CIT, CCN; Former Chair, International Union of Crystallography Commission on XAFS

International Radiation Physics Society, Former President

School of Physics, University of Melbourne, Parkville Victoria 3010 Australia

+61-3-83445437 FAX +61-3-93474783 chantler@unimelb.edu.au chantler@me.com

https://www.ph.unimelb.edu.au/~chantler/opticshome/home.html

https://www.ph.unimelb.edu.au/~chantler/opticshome/xrayopt/

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Today's Topics:

   1. Correcting for over absorption (cameron.mollazadeh@colorado.edu)
   2. In reference to the prior overabsorption (Cameron Mollazadeh)


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Message: 1
Date: Mon, 03 Feb 2025 21:59:27 -0000
From: cameron.mollazadeh@colorado.edu
Subject: [Ifeffit] Correcting for over absorption
To: ifeffit@millenia.cars.aps.anl.gov
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Hi Matthew,

I was re-reading the larch documentation as my data is suffering for over absorption and was wondering how I can go about implementing the correction factor. I am primarily using the data for EXAFS analysis and was also wondering if this technique is still questionable for EXAFS.

Thank you!
Cameron

------------------------------

Message: 2
Date: Mon, 3 Feb 2025 22:01:09 +0000
From: Cameron Mollazadeh <Cameron.Mollazadeh@colorado.edu>
Subject: [Ifeffit] In reference to the prior overabsorption
To: Cameron Mollazadeh via Ifeffit <ifeffit@millenia.cars.aps.anl.gov>
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Here is a photo of the “normalized” spectra
[cid:image001.png@01DB764C.751787B0]
Best,
Cameron Mollazadeh
PhD Student | Toney Group | CU Boulder

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