[Ifeffit] Lost second shell

Eugenio Otal eugenioh at gmail.com
Sun Feb 1 20:52:38 CST 2009

Hi all,
I am working with Er doped ZnO and the EXAFS measurements (Er L3) shows that
I have not a second shell when I perform the FT. I checked that the phase is
not destroying the signal, and that is not the guilty guy.
I have two possibilities, that the erbium is segregated on the surface of
the particles with a strong disordered phase that destroy second shell
information (XANES simulation are different from oxide and hydroxides) or
that the atoms are isolated in the surface of the particles.
Should I use the card for molecules for isolated atoms? And for the
disordered phase, what can I do?
Is there another possibility to lose the second shell?
Thanks in advance, euG
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