Fig. 1.
Pulse (gray) due to interaction of a 511 keV γ-ray in a GSO crystal attached to a PMT is shown. The black trace is the pulse due to a single photoelectron generated by a photon from a red LED.
Pulse (gray) due to interaction of a 511 keV γ-ray in a GSO crystal attached to a PMT is shown. The black trace is the pulse due to a single photoelectron generated by a photon from a red LED.