On 07/28/2016 05:52 PM, Neil M Schweitzer wrote:
Are there standard ways of relating the parameters (deltaR and sigma^2) of multiple scattering paths to the parameters of the single scattering paths based on the type of MS path? For example, would deltaR_MS = deltaR_SS*2 if the MS was a “forward through” geometry? What about other geometries and paths that involve different types of atoms?
Scott basically answered your question, but there are a couple relevant links in TFM, which you should definitely R: http://bruceravel.github.io/demeter/documents/Artemis/extended/delr.html http://bruceravel.github.io/demeter/documents/Artemis/extended/ss.html Check out the paper by Hudson et al mentioned in section 15.4.2. I say a few possibly useful things in https://speakerdeck.com/bruceravel/discussion-of-the-fes2-exafs-analysis-exa... A bit of searching in the literature will turn up several papers in which people have attempted to quantify the perpendicular contribution to Delta R and sigma^2 in the case of collinear MS paths. B -- Bruce Ravel ------------------------------------ bravel@bnl.gov National Institute of Standards and Technology Synchrotron Science Group at NSLS-II Building 743, Room 114 Upton NY, 11973 Homepage: http://bruceravel.github.io/home/ Software: https://github.com/bruceravel Demeter: http://bruceravel.github.io/demeter/