[Ifeffit] Large Amplitude Values

Gavin Garside gavin_garside at yahoo.com
Fri Jul 30 21:47:55 CDT 2010

Fellow X-Ray Absorption Enthusiasts,

I have recently compiled a model that gives excellent visual fits in R, q, and k 
space for bond spacing in a BCC structure.  This model gives bond spacings that 
make sense, and are very close to what would be expected from this set.  The R 
factors are very low, and the enot values correspond quite well to the edge.  
However, our amplitude values are much larger than typically expected.  They 
come in at the range of 1.8 up to 5.0, but only on a few data sets.  On all the 
rest the amplitude values are 0.4 to 1.0.  Could this increase in amplitude be 
attributed to the fact that we ran florescence measurements instead of 
transmission, and have a weaker signal coming to the detector?  What else could 
be causing this in only one data set? All samples used in this model have the 
same structure.  Thanks in advance to any replies, your help and time is  

gavin_garside at yahoo.com

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