[Wien] Broadening in XAFS / ELNES

[David Holec]

Dear Che,

as far as I understand it, the broadened ELNES intensity is obtained by 
convolution of the unbroadened intensity with the Lorentzian profile. 
Analytically this is expressed as:

I_br(E)=\int I(E') \Gamma(E) / ( \pi ((E-E')^2+\Gamma(E) ) dE'

\Gamma(E) is for example the function given for in Moreau's paper, I(E') 
is the unbroadened ELNES.

Hope this is helpful.
David

Che Seabourne wrote:
> I am using the latest version of Wien - with the pre-compiled 
> executables from the website. This question specifically relates to the 
> TELNES and related broadening modules. Having searched through the 
> previous mailing lists, I have been able to find Kevin Jorissen's 
> previous descriptions of the various broadenings that can be applied to 
> the results. Of particular interest to myself is the energy dependent 
> final-state lifetime broadening capability.
> 
> With a background in chemistry I have been able to successfully 
> understand Moreau et al's description of finding a Lorentzian broadening 
> factor. I would however be interested to know in basic terms (being a 
> non-expert) how this is applied to the raw .elnes data.
> 
> Any advice would be greatly appreciated
> 
> Che Seabourne
> 
> -- 
> --------------------------------------------------
> Che Seabourne
> Institute for Materials Research
> SPEME
> University of Leeds
> chmcrs at leeds.ac.uk <mailto:chmcrs at leeds.ac.uk>
> http://www.engineering.leeds.ac.uk/imr/people/ResearchStudentProfiles.shtml
> 
> 
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