[Ifeffit] Peakfit tool - determination of width

Matt Newville newville at cars.uchicago.edu
Fri Feb 22 17:12:40 CST 2013


Hi Lisa,

On Fri, Feb 22, 2013 at 4:04 PM, Gudrun Lisa Bovenkamp
<bovenkamp at physik.uni-bonn.de> wrote:
> Hey Bruce,
>
> I was wondering how the width in the peak fitting tool of Athena is
> connected to the real data. What I mean is:
> A gaussian peak with a width of 1 (eV ?) seems to have a FWHM of 2 eV.
>
> Is it possible that you mean with "the Gaussians (...) are unit normlized
> (...)"
> the width is actually "sigma" and the amplitude is actually "mu" in the
> pure formula?
>
> Thanks,
> Lisa
>
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See  http://xraypy.github.com/xraylarch/fitting/lineshapes.html  for
the definition of the Gaussian lineshape used.

--Matt



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