On Monday 26 January 2009 09:28:08 am Bindu R. wrote:
I have one doubt regarding the measurement uncertainty in R- space (εR). In the manual it is written that εR is evaluated from the rms value of FT in the range 15-20 Å. My doubt is.....
In case the FT in R-space does not extend up to the range mentioned above, then how does the fitting program choose the value of εR?
The case where there is no signal in the very-high-R range is the case in which this approximation is most valid. If there is no EXAFS above 15 A, then the only source of non-zero spectral weight is noise. B -- Bruce Ravel ------------------------------------ bravel@bnl.gov National Institute of Standards and Technology Synchrotron Methods Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 My homepage: http://xafs.org/BruceRavel EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/