[Ifeffit] Requesting guidance in understanding results from Athena

Deepak Varanasi tirrano1 at gmail.com
Sun Sep 13 16:39:08 CDT 2020


Good afternoon

That makes sense. Thank you. I am glad and honored to have seeked all your
guidance. Thank you, everyone.

Yours sincerely
Deepak Varanasi

On Sun, Sep 13, 2020, 16:37 Mike Massey <mmassey at gmail.com> wrote:

> It sounds to me like you are understanding things well. The short, short
> version is that the purpose of the rbkg parameter is to filter out the
> low-frequency oscillations (arising from any of numerous sources) in the
> spectrum, that correspond to interatomic distances that make no physical
> sense.
>
> Or maybe I don't get it either ;)
>
> Scott Calvin's book has a nice discussion of these points, I recommend it.
>
>
> Kind Regards,
>
>
>  Mike
>
>
>
>
> On Sep 14, 2020, at 9:18 AM, 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.
>
>
>
> <57BA12E4C0E6403EA1E7F05BCB60610D.png>
>
>
>
> <EA39B14C51484FAFBA570A6B7FB2E046.png>
>
>
>
>
>
> Resulting R – space graphs: -
>
>
>
> <13111BEC5BCF46A8A8E5CDAE32782D44.png>
>
>
>
>
>
> <C7930CEA51084A03A840FC32E885015D.jpg>
>
>
>
> <4A7FE6C9D4EC4E0F83E8B43E23D5ED48.png>
>
>
>
> Resulting R – space graphs: -
>
>
>
>
>
> <83E495E5D37B431AB31567B6ED982716.png>
>
>
>
>
>
>
>
>
>
>
>
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