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

[Carlo Segre]

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 <tirrano1 at gmail.com> 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 <anatoly.frenkel at stonybrook.edu>
> *Sent: *Sunday, September 13, 2020 12:58
> *To: *XAFS Analysis using Ifeffit <ifeffit at millenia.cars.aps.anl.gov>
> *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 <tirrano1 at gmail.com>
> 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]
>
>
>
>
>
>
>
>
>
>
>
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-- 
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 at iit.edu   http://phys.iit.edu/~segre   segre at debian.org
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