the measured peak centroid approach the true centroid (1000) as the number of
counts (N) increases?
Notice also how the measured peak width (FWHM) varies with the number of
It can be seen that neither the centroid number or FWHM vary
systematically with N. But both become better defined as N increases.
We can now fit the peak.
The peak can be fitted to a peak shape, e.g. Gaussian distribution.