GAMMASPHERE information, reference details
When this calibration procedure was developed we thought that the best
thing to do was to have perfect reference spectra to compare the
germaniums agains at later time. We thought that when we dumped the
germanium spectra shortly after a perfect source calibration (an after
a possible doppler correction) we would have perfect spectra. However,
we have seen that a few detectors seems to change gain once the beam is
on target. We speculate that this is due to the higher rate when the
beam is on. Typically we see 2-3 detectors act like this, the rest
seems to be ok.
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