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.samue...@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 >> >> >> _______________________________________________ >> Ifeffit mailing list >> Ifeffit@millenia.cars.aps.anl.gov >> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit >> > > > -- > Dr. Dominik Samuelis > d.samue...@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 > Web http://www.fkf.mpg.de/maier/ > > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
