[Ifeffit] how to reduce the core-hole lifetime broadening in feff8.2

Janine GRATTAGE janine.grattage at esrf.fr
Thu Jun 11 09:29:51 CDT 2009

Hi Tonya,

I use the EXCHANGE card to reduce the applied broadening in my spectra. 
If you set the third parameter in the card to a number less than zero 
(up to about -5 in my experience) then the broadening is reduced and you 
can calculate high resolution type XANES spectra. This applies only to 
some inherent limit in the calculations where further reducing the 
parameter has no effect.
You can look up the EXCHANGE card on the feff wiki as it also can be 
used to change the exchange model and the position of the Fermi level.

Hope that helps you!

tony vitova wrote:
> Dear all,
> Could somebody give me a hint how to reduce the core-hole lifetime 
> broadening in feff8.2? Do I need to change the source code? I have 
> partial fluorescence yield XANES spectrum whose White Line is narrow 
> than the one in the calculation.
> Thanks for any help
> Tonya
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Postdoctoral Fellow, ID26
European Synchrotron Radiation Facility (ESRF)
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38043 Grenoble, Cedex 9, FRANCE
Tel:   +33(0)4 38 88 19 30
Email: janine.grattage at esrf.fr 

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