Environmental Restoration Group
Ludlum Model 43-93
Ludlum Product Description
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 WINDOW AREA: 100 cm2 active; 89 cm2 open PHOTOMULTIPLIER TUBE: 1.125"(2.9 cm) diameter EFFICIENCY (4pi): 20% - 239Pu; 15% - 99Tc; 20% - 90Sr/Y BACKGROUND: Alpha - Less than 3 cpm; Beta - Typically 300 cpm or less SIZE: 3.2" H x 3.5

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