Hi Kleber, > I'd like to use the third cumulant option in Artemis, but considering the > Debye model. Artemis has a Debye function for the second cumulant > (Debye-Waller factor) but not to the third. How could this be done in > Artemis?
The debye and eins functions in Artemis/Ifeffit calculates sigma2 only. One could use the debye (or eins) function for sigma2 and either allow the third cumulant to vary freely or constrain it to be based on the value of sigma2. There are a few approaches to this in the literature, but I'm not aware of a general solution. Would that approach be sufficient, or do you have a particular model relating the third cumulant to sigma2 in mind? --Matt _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
