Full Width Half Maximum..

Tagged: FWHM

This topic has 3 replies, 3 voices, and was last updated 4 years ago by dgteam.

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March 24, 2020 at 2:14 am #3457
geojack
Participant
Is it possible to calculate FWHM? It is really essential to me..
March 24, 2020 at 1:09 pm #3458
francesco turci
Participant
It is just 2 sqrt(2 ln2) sigma, where sigma is the standard deviation…
March 25, 2020 at 1:29 am #3464
geojack
Participant
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)?
March 25, 2020 at 4:30 am #3465
dgteam
Moderator
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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