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

Hi Janine and Bruce,   Thanks a lot! I didn't think that the EXCHANGE card might take and negative values...   Tonya --- On Thu, 6/11/09, Janine GRATTAGE wrote: From: Janine GRATTAGE Subject: Re: [Ifeffit] how to reduce the core-hole lifetime broadening in feff8.2 To: "XAFS Analysis using Ifeffit" Date: Thursday, June 11, 2009, 5:29 PM 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! Janine 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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-- Dr Janine GRATTAGE Postdoctoral Fellow, ID26 European Synchrotron Radiation Facility (ESRF) Sector 26, BP 220 6, rue Jules Horowitz, 38043 Grenoble, Cedex 9, FRANCE Tel:   +33(0)4 38 88 19 30 Email: janine.grattage@esrf.fr _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit