Dictionary:Fig S-2

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FIG. S-2. Scintilometer. An incident gamma ray on a scintillation crystal of NaI causes the crystal to emit a photon, which then causes the photo electrode to emit electrons. The number of electrons is multiplied as each strikes a series of electrodes, finally being collected by an anode where the consequent current is proportional to the energy of the incident gamma ray. (From Sheriff, 1989, 154.)