Evaluating the Response of Polyvinyl Toluene Scintillators Used in Portal Detectors
Kelly D. Rakes
Broschiertes Buch

Evaluating the Response of Polyvinyl Toluene Scintillators Used in Portal Detectors

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Scintillator panels of the same type as those used in portal detector units, made of polyvinyl toluene and measuring 12 x 15 x 2 in were purchased from three vendors. Each vendor supplied two scintillators, one wrapped by the vendor with aluminum foil coated mylar, and two unwrapped. The scintillators where exposed to a ~8 microCurie source collimated 137Cs source which decays with a 662 keV gamma-ray 85% of the time. A Hamamatsu R329-02 photomultiplier tube was optically mated to the 12 x 2 in surface of the scintillator. The pulse-height spectrum was recorded with the source placed at differ...