[Ifeffit] E0 issues
hana63.new at gmail.com
Mon Jun 27 16:04:11 CDT 2011
I guess my question is obvious to most of you, but after some practice and
reading, the following is still unclear to me (hopefully some other beginners
will benefit): Normally I have calibrated my spectra using a calibration foil –
so energy shift was done according to that companion standard. Doing a simple
linear combination fit, I have set all spectra to the same E0 value, somewhere
on the edge, above the first derivative maxima (was it a good practice?).
Recently, I found myself actually confused about E0; since my samples inherently
have a phase difference (which is the base to my ability to differentiate them),
how a certain reference point on the spectrum can be determined? What can be
done when I do not have the calibration foil (especially for these heavy
elements that do not have specific sharp feature)? And further, now that I am
starting to work on the structural model; how actually IFEFFIT determined the
energy shift when there is no specific reference point?
I would be happy to get a better insight.
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