Skip to main content
. 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. 5.

Fig. 5

Top panel shows the single photoelectron peak (SPE) obtained on one channel of a digitizer due to the red LED light source (dark curve). The gray curve is the result for this channel when the light source is turned off. The bottom panel shows a simultaneously acquired energy spectrum in the second channel of the digitizer due to γ rays from a 5 μCi 22Na source.