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. Author manuscript; available in PMC: 2005 Dec 20.
Published in final edited form as: IEEE Trans Nucl Sci. 2005 Feb;52(1):28–32. doi: 10.1109/TNS.2004.843151

Fig. 4.

Fig. 4

Count rate (c/s) of single photoelectrons observed is plotted versus the length of the veto gate in the presence of γ-ray events. A 1 cm3 GSO crystal was attached to the PMT and a 5 μCi 22Na source placed next to the crystal. The γ-ray event rate was 1700 counts/s.