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
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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