[Wien] Broadening in XAFS / ELNES

[Che Seabourne]

Thanks for that explanation.

Che

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
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