Alpha Detector - Model 43-1
CE Seal

INDICATED USE: alpha survey
SUGGESTED INSTRUMENTS: general purpose survey meters, ratemeters, and scalers
DETECTOR TYPE: scintillator, ZnS (Ag)
PHOTOMULTIPLIER TUBE: 3.8 cm (1.5 in.) diameter, magnetically shielded
DETECTOR OPERATING VOLTAGE: typically 500 to 1200 volts
WINDOW: typically 0.8 mg/cm² metalized polyester (1.2 mg/cm² recommended for outdoor use)
WINDOW AREA: 75 cm² open
BACKGROUND: 3 cpm or less
CONNECTOR: series "C", others available
CONSTRUCTION: aluminum housing with beige powder coat
NON-UNIFORMITY: less than 10%
EFFICIENCY (4π): 33% for 239Pu
SIZE: 12.2 x 24.9 cm (4.8 x 9.8 in.) (Dia x L)
WEIGHT: 0.9 kg (2 lb)