Hi all members, I have some problems with my assignment here. I would like to confirm on something on SEXAFS (surface extended x-ray adsorption fine structure) such as to determine the bond length of near neighboring atom and geometry of it. But I do not have a clear idea on how to get the bond length and geometry from the spectra of EXAFS. Can anyone help me on this? why there is a specific azimunth number or plane is needed for adsorption analysis? the motive of changing the incident x-ray to the sample which give different spectra? How do we calculate the bond length from the spectra in details? and the geometry as well? Thanks.