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UserOriginal

2 Posts
Posted - 07/25/2015 :  1:24:20 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 9.1.0 (64-bit)
Operating System: Windows 8.1

Hello!
I'm going to fit Gauss function to two peaks which are connected to each other. It's a part of a graph of X-ray powder spectroscopy (the probe was NaCl and the lamp had Cu anode, no monochromator was used). When I fit Gauss function to single peak (K_beta), it works correctly. However, I don't know how to fit this function to two different peaks which are interfering with each other (K_alpha). I tried to define a custom function which was a sum of two Gauss function (my professor told me to do it), but it wasn't working correctly, even if I had given the estimated parameters to Origin. I have been searching for it on many websites and in Origin help, but I haven't found the answer. Could you help me?

UserOriginal

2 Posts
Posted - 07/25/2015 :  5:04:35 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I've just found how to do it. I had to click Analysis -> Peaks and Baseline -> Multiple Peak Fit and choose Gauss function and appropriate data from my graph.
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snowli

USA
1381 Posts
Posted - 07/27/2015 :  3:52:07 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello,

Great that you found it.

BTW, we also have some useful blogs about peak fitting/deconvolution
http://blog.originlab.com/data-analysis/how-do-i-perform-peak-deconvolution
http://blog.originlab.com/data-analysis/how-to-define-a-peak-function-for-peak-fitting


Thanks, Snow
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