CEF fitting program

Bugs
1

I am running CEF fit and I think that there is a bug on the fitting program.

I would like to tie all the sigma of the Gaussian that fit the CEF peaks but they cannot be fixed – when I run the fit they come out with much larger values than what I give as fixed and this does not allow me to fit the data.

This is the line of the command I am using:

cf.peaks.tieAll(‘Sigma={}’.format(0.028/2.35), 0, 20)
fit = CrystalFieldFit(Model=cf, InputWorkspace=‘LET36363_1.05meV_q_line’,MaxIterations=10)
fit.fit()

Thank you

Tatiana

2

Hi Tatiana,

I’ve had a look at this problem and its not immediately obvious what is wrong. I’ve raised an issue for this to be fixed: Ties not working in Crystal Field fitting · Issue #27748 · mantidproject/mantid · GitHub

3

Hi Daniel, thank you.

There might a problem in the fixing of the elastic line intensity – but even without that it does not work.

Please let me know when there is any progress.

Thank you

Tatiana

4

Hi Tatiana,
The fix for this issue has been merged. So this problem should be solved in the next Nightly build, and in the Beta testing version of Mantid next week.