Ludlum Model 44-21
Beta & Beta Gamma Scintillation Detector
Part Number 47-1560

INDICATED USE: Beta, low energy gamma detection
SCINTILLATOR: 1" (2.54 cm) diameter x 1 mm thick Nal adhered to a 0.001" (0.03 cm) thick plastic scintillator
PHOTOMULTIPLIER TUBE: 1.5"(3.8 cm) diameter
WINDOW: 3.4 mg/cm²
WINDOW AREA: 5.1 cm² active and open
EFFICIENCY (4pi): 19% - ¹²⁹I; 5% - ¹⁴C; 28% - ³²P
BACKGROUND (10 µR/hr): 450 cpm
ENERGY REPONSE: Energy dependent
NON-UNIFORMITY: Less than 10%
OPERATING VOLTAGE: Typically 500- 1200 volts
COMPATIBLE INSTRUMENTS: General purpose survey meters, ratemeters and scalers
SIZE: 2" diameter x 7.3" L (5.1 x 18.5 cm)
WEIGHT: 1 lb (0.5 kg)


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