Full Width Half Maximum..

[geojackParticipant]

Is it possible to calculate FWHM? It is really essential to me..

[francesco turciParticipant]

It is just 2 sqrt(2 ln2) sigma, where sigma is the standard deviation…

[geojackParticipant]

Thanks! But I am a bit confused. So how should I get the FWHM from the second peak in this example (x value 8-9)?

[dgteamModerator]

 

In the Beta version, there is a Peaks option in the Fit command.

From this you can extract, the standard deviations for the Peaks into a column.

 

Then you could use an Expression to calculate from the deviation.

This calculation assumes a normal distortion, so for the spectrum you showed you would want a smooth baseline.

Does that help?

You can also email us this data to the help email and we can try smoothing the baseline.

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