[Ifeffit] pre-edge centroid

[Andrew Korinda]

Enyuan,

I've had trouble with fitting in Athena as well and just used Excel
and a Gaussian function for the peak. As Domink stated, fitting the
edge as an arctan function simultaneously is a large help. I had tried
extracting the pre-edge and fitting the peak in Origin as a
pseudo-Voight function; however, I couldn't get a reliable fit of the
edge alone.

In summary, it's a bit of all or nothing. When fitting the arctan
function, I typically stopped at 2 eV below the edge.

Andy Korinda

On Thu, Aug 9, 2012 at 8:11 AM, Dominik Samuelis <d.samuelis at fkf.mpg.de> wrote:
> Dear Enyuan,
>
> in my experience, peak fitting works very well with Athena. Try not to fit
> only the prepeak, but maybe include an arctan describing the edge (see
> attached pdf, the fit was made using athena). This makes isolating the
> prepeak much more reliable.
>
> Best regards,
> Dominik
>
>
> On 09.08.2012 06:21, Enyuan Hu wrote:
>>
>> Dear all,
>>
>> I was wondering if anyone could comment on how to get the centroid of
>> pre-edge by fitting the pre-edge peak by pseudo-Voigt functions. I tried
>> to do that in Athena, but it seemed that peaking fitting part is the
>> relatively less developed function in the software. Any comment would be
>> appreciated.
>>
>> Enyuan
>>
>>
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>>
>
>
> --
> Dr. Dominik Samuelis
> d.samuelis at fkf.mpg.de
> Max-Planck-Institut für Festkörperforschung
> Max Planck Institute for Solid State Research
> Heisenbergstr. 1
> 70569 Stuttgart
> Germany
> Phone +49-711-689-1769
> Fax   +49-711-689-1722
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>
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