Hi Jenny,
As Bruce pointed out, Ifeffit can fit such peaks, as can many other
programs. The issues I'd be most concerned with would be the same
using Ifeffit or something else, and are
a) how to model the background of the spectra you showed: it doesn't
look especially simple. You could include a constant and a very broad
arctangent function for the background, or perhaps a polynomial. I
think that Athena's "Fit Peak" screen does not have an option for all
this, but it can be done with an Ifeffit script.
b) how to set (and constrain?) the various centroids and widths of
the peak basis functions. This is notoriously tricky, especially with
the overlapping sub-peaks in the spectra you showed. My experience is
that fixing the centroid energies of peak functions and letting the
amplitudes vary is the most robust approach.
Hope that helps,
--Matt
On Thu, Sep 18, 2008 at 2:45 PM, Jenny Cai
Hi guys,
Could anyone tell me which software in Ifeffit package can do peak fitting like the one shown in the attached file?
Thank you in advance!
Jenny Cai
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