Hi Darren,
It's probably not doable in a conventional experiment. You're going to have great big tantalum edges right on top of your germanium XANES. And then you've got a forest of tantalum fluorescence lines near your germanium K-alpha lines.
So if your thin film is at all thick compared to an absorption length of tantalum, then the probe depth is going to change sharply across the spectrum, and that will show up in your signal. If it's not that thick, then your germanium signal will be very weak. And in either case, you're going to have a hard time separating out the germanium fluorescence from the tantalum fluorescence, while the latter is varying dramatically in intensity.
--Scott Calvin
Sarah Lawrence College
On Jun 27, 2013, at 9:48 AM, Darren Dale
Hello All,
If I have a Ta(1-x)Ge(x)O(y) thin film, with Germanium concentration of a few percent, is it possible in principle to get useable fluorescence-mode EXAFS spectra around the Ge K edge (11.1 keV)? Or is it likely that the spectra would be complicated by additional Ge fluorescence excited by processes triggered by Tantalum L edge absorption (9.88, 11.13, 11.68 keV)?
Thanks, Darren _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit