[Ifeffit] limits for second shell

Scott Calvin SCalvin at slc.edu
Fri Aug 21 08:48:23 CDT 2009

Hi Eugenio,

To my eye, I strongly suspect there's real signal there. To confirm,  
try several different k-ranges and k-weights. If the feature persists,  
it is likely physical. (It may change size and shape to some extent.)

--Scott Calvin
Sarah Lawrence College

On Aug 20, 2009, at 11:54 PM, Eugenio Otal wrote:

> Hi,
> I have a sample of a pure Er2O3 (blue line in the attached graph)  
> and a sample of doped ZnO with erbium that has segregated the same  
> oxide (red line) by thermal treatmen.
> The signal for de segregated oxide gets noisy around k=9 because the  
> sample is so diluted, but the radial distribution shows second shell  
> signal, smaller than the pre oxide, but still a signal. My doubt is  
> about how to know if the second shell is real and if that second  
> shell can be useful to obtain information. Is there a criteria to  
> know that? Some limit in k-space?
> Thanks, euG
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