Ludlum Model 43-5
Alpha Scintillation Detector
Part Number 47-1521

INDICATED USE: Alpha survey
SCINTILLATOR: ZnS(Ag)
WINDOW: Typically 0.8 mg/cm² aluminized mylar (1.2 mg/cm² recommended for outdoor use)
BACKGROUND: 3 cpm or less
NON-UNIFORMITY: Less than 10%
SUGGESTED INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
OPERATING VOLTAGE: Typically 500 - 1200 volts
WINDOW AREA: 76 cm² active, 50 cm² and open
PHOTOMULTIPLIER TUBE: 1.5"(3.8 cm) diameter
EFFICIENCY (4pi): 13%-²³⁹Pu
SIZE: 2" H x 2.5" W x 9.8" L  (10.2 x 6.4 x 35.6 cm)
WEIGHT: 2 lbs (0.9 kg)


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