[GSAS-II] Refining sigma and gamma in GSASIIscriptable

[joseph.ramsay at stfc.ac.uk]

Hi all,

I'm trying to replicate a use case where scientists used GSAS 1 to refine the sigma and gamma profile coefficients, this time using GSASIIscriptable. I've come up across a couple of stumbling blocks to this, and any pointers would be really helpful.


1.       Gamma no longer appears to exist at all in GSAS-II

sig-n parameters appear in the Instrument Parameters tab, but gam-n parameters are nowhere to be seen. Are they going by a different name, or do they need to be calculated in some other way?


2.       Neither appear in the documentation for refinement parameters in GSASIIscriptable

Can these be used as parameters for refinement from GSASIIscriptable, and if so, what is the correct place to put them in the tree? I notice different keys for peak profile terms (U, V, W, X, Y) - are these related in some way?

Any help with either of these points would be much appreciated,
Joe
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.aps.anl.gov/pipermail/gsas-ii/attachments/20180116/201aa6c8/attachment.html>