New subject: [EXT] Ifeffit Digest, Vol 276, Issue 2

5 Feb 2025

      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

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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.aumailto:chantler@unimelb.edu.au chantler@me.com<https://urldefense.us/v3/__https://owa.unimelb.edu.au/owa/redir.aspx?C=c7BoS0kVVkC1_S95-9x9l5cBu6YTjdAITgSrfUpfDAUV5oUH1LFYBcz08w8xvHMJoosZRdagfQM.&URL=mailto*3achantler*40me.com__;JSU!!G_uCfscf7eWS!biOVwB-Uk7ZDOC0yX-IaOiKXOLvtM_TbEQY6sz4qP8_6lOyMe_qr1R1ncVst9ayD1H7jeb2yREui5CzPeBDOCFbd_aCVwEPZLmy_$ >

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Subject: [EXT] Ifeffit Digest, Vol 276, Issue 2

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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
Message-ID:
        <173861996743.2557830.8195040248000522658@millenia.cars.aps.anl.gov>
Content-Type: text/plain; charset="utf-8"

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 
Subject: [Ifeffit] In reference to the prior overabsorption
To: Cameron Mollazadeh via Ifeffit 
Message-ID:  
Content-Type: multipart/related;        boundary="_004_SN6PR03MB459217
        5B3E3C1276F36D33F9F1F52SN6PR03MB4592namp_";
        type="multipart/alternative"

Here is a photo of the “normalized” spectra
[cid:image001.png@01DB764C.751787B0]
Best,
Cameron Mollazadeh
PhD Student | Toney Group | CU Boulder

Re: [EXT] Ifeffit Digest, Vol 276, Issue 2

Christopher Chantler

Cameron Mollazadeh

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