Re: [Ifeffit] [Ext] Re: Requesting guidance in understanding results from Athena

There is no physical meaning. It is simply a bad numerical background subtraction. Carlo On Sun, Sep 13, 2020 at 4:18 PM Deepak Varanasi wrote:

Good afternoon

The problem lies with understanding the meaning behind signals occurring below the 1-angstrom mark. The location of the peaks and the physical meaning thereof are making no sense to me. Kindly provide me with your guidance in facilitating my understanding.

Yours Sincerely

Deepak Varanasi

Sent from Mail https://go.microsoft.com/fwlink/?LinkId=550986 for Windows 10

*From: *Anatoly Frenkel *Sent: *Sunday, September 13, 2020 12:58 *To: *XAFS Analysis using Ifeffit *Subject: *Re: [Ifeffit] Requesting guidance in understanding results from Athena

Where is the conundrum? You make rbkg smaller and you see more low frequency features in EXAFS, as expected.

Anatoly

On Sun, Sep 13, 2020 at 1:47 PM Deepak Varanasi wrote:

Good afternoon

I hope that you are doing well and are healthy. My name is Deepak

Varanasi and ii am an undergraduate student at Middle Tennessee State University In need of your guidance for my thesis project. I am having trouble interpreting results for my EXAFS analysis done on Athena – specifically, the emergence of a signal in R-space, below the 1 – angstrom mark, after suppressing it via its rbkg parameter (signified by the black arrows). I have checked my back ground reduction and normalization multiple time sand have failed to isolate the reason behind my results or maybe it is the due to the gaps in my knowledge that prohibit my understanding of the results. At the risk of sounding armature, may I request your guidance in resolving my conundrum please? I would be honored to have your council in solving, understanding and comprehending the physical and chemical implications of my results. For your convenience, I have also appended a picture of my results to illustrate my query. Kindly contact me at your earliest convenience and please stay safe and healthy.

Yours Sincerely

Deepak Varanasi

P.S.: For your convenience, I have also appended a picture of my results to illustrate my query.

Resulting R – space graphs: -

[image: An Ink Drawing With Ink Annotations]

Resulting R – space graphs: -

[image: An Ink Drawing]

_______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit

_______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit

-- Carlo U. Segre -- Duchossois Leadership Professor of Physics Director, Center for Synchrotron Radiation Research and Instrumentation Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 segre@iit.edu http://phys.iit.edu/~segre segre@debian.org