[Ifeffit] Re: Re: Re: XAFS Analysis using Ifeffit

jana padeznik jana.padeznik at uni-mb.si
Fri Aug 4 06:58:39 CDT 2006


>How do you get those absorption backgrounds, free of EXAFS?  I can see it 
>for Kr, but how did you do it for the other,
>chemically-reactive elements?
>    mam
>
In short: we've chosen at least two compounds of each element with 
especially simple
EXAFS signal (mostly glasses), modeled this signal and eliminated it 
from the original
data. This residual is used as an approximate atomic absorption 
background for the
other sample, whose spectrum, after subtraction of this background, is 
the basis for
an improved EXAFS model. Afterwards, the role of the two spectra is 
switched.
After a few steps the published estimates were obtained.

The procedure is described in the article:

Padeznik Gomilsek, J., Kodre, A., Arcon, I., Loireau-Lozac'h, A., 
Benazeth, Multielectron photoexcitations in x-ray-absorption spectra of 
4p elements. Phys. rev., A, 1999, vol. 59, no. 4, 3078-3081

Some information can be found on Iztok Arcon's website: 
http://www.p-ng.si/~arcon/xas/ <http://www.p-ng.si/%7Earcon/xas/>


Best regards,

Jana

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