Ludlum Model 43-1
Alpha 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%
SUGGESTED INSTRUMENTS: Models 2224-1, 2360
CROSS TALK:
Alpha to beta - less than 10%
Beta to alpha - less than 1%
OPERATING VOLTAGE: Typically 500 - 1200 volts
WINDOW AREA: 83 cm² active; 75 cm² open
PHOTOMULTIPLIER TUBE: 1.5"(3.8 cm) diameter
EFFICIENCY (4pi): 30% - ²³⁹Pu; 30% - ⁹⁰Sr/y; 5% - ¹⁴C
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)

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