Alpha/Beta Detector - Model 43-93
CE Seal
Specifications

INDICATED USE: alpha beta survey
SUGGESTED INSTRUMENTS: Ludlum Model 2224-1, Model 2360, Model 2929, Model 3030E
DETECTOR TYPE:  ZnS(Ag) adhered to 0.0254 cm (0.010 in.) thick plastic scintillation material
EFFICIENCY (4π): 20% of 239Pu; 15% of 99Tc; 20% of 90Sr/90Y
WINDOW: 1.2 mg/cm² metalized polyester
REMOVABLE PROTECTIVE SCREEN:  0.79 mm (0.03 in.) thick, 6.5 mm (0.26 in.) square openings, 88% open
SCREEN OUTER DIMENSIONS: 167.6 x 92.2 mm (6.6 x 3.6 in.) (L x W)
WINDOW AREA:
Active: 100 cm² (15.5 in²) active     
        Open: 88 cm² (13.6 in²) open
NON-UNIFORMITY:  less than 10%
BACKGROUND: alpha: 3 cpm or less; beta; 300 cpm or less
CROSS TALK:
      alpha to beta: < 10%
      beta to alpha: < 1%
PHOTOMULTIPLIER TUBE: 2.9 cm (1.12 in.) diameter
OPERATING VOLTAGE: typically 500–1200 volts
CONSTRUCTION: aluminum with beige powder coating
TEMPERATURE RANGE: -20 to 50 °C (-4 to 122 °F)
CONNECTOR: series “C”, unless specified otherwise
OVERALL SIZE: 6.4 x 9.5 x 31 cm (2.5 x 3.8 x 12.3 in.) (H x W x L)
WEIGHT: 0.5 kg (1.0 lb)