Hi Hashem, I doubt they're "artifacts." Much more likely is that they are either due to multiple-scattering paths, or to sidebands of the single- scatterers. During analysis, you don't want to think of the Fourier transform as being literally a radial distribution function; i.e., features in the Fourier transform don't have a one to one correspondence with coordination shells. --Scott On Jan 14, 2009, at 8:11 AM, mstiet2@lsu.edu wrote:
Dear all,
I am currently fitting first and second shells with Zn-O and Zn-Zn paths,respectively. I get second shell features that could be fit quite well, but I am not certain if they are actually second shell features or possibly artifacts. For some samples I get second shell features that I know should not be present. What criteria would you use to distinguish between artifacts and actual shells?
Your assistance is appreciated.
Hashem Stietiya
Louisiana State University