I'm trying to fitting Cu Auger peak into various state (Cu0, Cu+, CuI etc..)
In Cu0, one of the peak's FWHM is 0.84 but when I try to enter smaller value than 0.89, "input error" is occured. How can I put smaller value?
And plus how can I 'fix' the FWHM of other values? Whenever I try to optimize peaks, the values are changing.
The value you are entering probably is not within the "fwhm Constr." range. Try to expand this range. The other possibility is that you are entering comma instead of dot.
P.S. 0.84 eV seems to be too low value for the FWHM of an Auger peak component.
Thank you for your kind information. I didn't know about "fwhm constr." range, and now I know what it is. Now I can adjust this value for 0.84 eV. Why I use 0.84eV is that I'm trying to use Cu LMM curve-fitting parameters. I attach the table.
Thank you very much for your time.
Seokgyu Kang please note that to do this you should record your data at the same pass energy as that paper (will be ~ 20 eV if I recall the paper correctly). There may also be differences if your system is not well calibrated or have charging effects
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