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In a graph like this:

http://en.wikipedia.org/wiki/File:Cs137_Spectrum.PNG

Source

What does the Channel Number represent?

Also, just to make sure, am I right in saying the count rate is [itex]\frac{\delta m}{\delta t}[/itex] ?

where m is the cumulative number of scintillations

and t is time

Edit: I've just noticed the graph says "number of counts" and not "count rate". Some graphs do though, so can I change my second question to: Is a count a single scintillation?

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# What is Channel Number? (In gamma spectroscopy)

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