HI Will, I am not entirely sure how this value is determined in Athena, but the number of independent data in a XANES fit is the data range divided by the resolution. If you have a spectrum with a strong pre-edge peak, you can determine the resolution from its width. Otherwise, the resolution is a convolution of the core-hole broadening and the beamline energy resolution.
Athena gives a value that is very close to the value determined directly from the width of a preedge peak. Sincerely, Wayne On Sun, Apr 9, 2017 at 8:59 PM, Will Bennett <w.benn...@griffith.edu.au> wrote: > Hi everyone, > > Just a quick question regarding the "Information Content" output in > Athena's LCF window. I've recently been playing around with using the > Hamilton test (as outlined in Scott Calvin's book "XAFS for Everyone") to > interrogate my combinatorics results. As many of you will know, this > requires an estimate of the number of independent measurements in the data, > in order to determine the degrees of freedom and subsequently the "a" value > for computing the Lower Incomplete Beta Function. Would Athena's value for > "Information Content" be appropriate to use as an estimate of the number of > independent measurements in this case? How is this value of "Information > Content" determined in Athena? > > Thanks in advance. > > Will > > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > -- Wayne Lukens Staff Scientist Lawrence Berkeley National Lab
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