[Ifeffit] Header information data Lepidocrocite

[daltonabdala at gmail.com]

Hello, Florian.

Welcome to the list!

I watched Bruce's video a while ago and I can not remember what those
acronyms stand for.

As for the 15k, that means how far in k (k A-1) he collected his EXAFS
data. You're missing an important information: E (eV) ~ 3.81 k2. Now, do
the math! Hope that'll make things more clear to you :)

As for the k steps, 0.05k, that was the way he collected his data, in
k-steps, instead of energy steps. I usually collect XANES data in E-steps
and switch to k-steps to collect EXAFS data.

I'm not sure if this is a proper venue to make advertisements but Scott
Calvin has recently published an excellent book on XAFS, XAFS for Everyone,
and I would suggest you to refer to it at your earliest convenience, so you
can work on your "backgrounds" more effectively :)


Good luck!


 - Dalton


On Tue, Nov 5, 2013 at 9:27 AM, Florian Werner <florian.werner at wzw.tum.de>wrote:

>  Hi All,
>
> I'm trying to find my way into XAFS data processing with Athena, but I'm
> new to the topic. I hope someone can help me out with my questions. As
> background information: Currently I'm planning my beamtime experiment for
> XANES spectra about phosphorus speciation at SLRI in Thailand.
>
> I have made a tutorial with data from Bruce Ravel from scans of
> Lepidocrocite. I have a question regarding this data. For example in the
> header information of file Fe_lepidocrocite.000 (from Bruce Ravel's github
> site) there can be found the abbreviations SRB, SRSS and SPP. So my first
> question is: What do this abbreviations stand for? SRB is the sampling
> range (SR..?!), i guess, so what does 15k stand for (data ends at
> 7971.35723 keV, but how is this connected to "15k"?)? SRSS manages the step
> size (..SS?), but how does "0.05k" result in the given steps?
>
> I assume that this kind of "k"-settings may be limited to X-23A2 beamline
> (or BNL), but still I'm anxious to know how the data has been collected.
>
> Best regards,
>
> Florian
>
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