Ludlum Model 43-1-1
Alpha Beta Phoswich Scintillation Detector
Part Number 47-2336

Indicated Use: Alpha beta survey
Scintillator: ZnS(Ag) adhered to 0.010" thick plastic scintillation material
Window: 1.2 mg/cm2
Non-Uniformity: Less than 10%
Cross Talk: Alpha to beta - less than 10%; beta to alpha - less than 1%
Suggested Instruments: Models 2224-1, 2360
Operating Voltage: Typically 500 - 1200 volts
Connector: Series "C" (others available)
Temperature Range: -4º F to 122º F (-20º C to 50º C)
Construction: Aluminum housing with beige powder coat paint
Window Area: 83 cm² active; 75 cm² open
b 1.5" (3.8 cm) diameter
Efficiency (4pi): 30% -   239 Pu; 30%-90Sr/90Y; 5%- 14 C
Background: Alpha - less than 3 cpm; Beta -typically 300 cpm or less
Size: 4.8" diameter x 9.8" L (12.2 x 24.9 cm)
Weight: 2 lbs (0.9 kg)