Model 43-89 Alpha /Beta Scintillator

The Model 43-89 is a 100 cm² dual phosphor alpha/beta scintillator that is designed to be used for simultaneously counting alpha and beta contamination

Indicated Use Simultaneous alpha and beta survey
Detector Type ZnS(Ag) adhered to 0.25 mm (0.01 in) thick plastic scintillator
Window 1.2 mg/cm² metalized polyester
Window Area Active: approx. 125 cm² (19.4 in²)
Open: approx. 100 cm² (15.5 in²)
Protective Screen 0.76 mm (0.030 in.) thick stainless steel, 6.4 mm (0.25 in.) hex, 79% open
Outer Dimensions (L x W): 168 x 92 mm (6.6 x 3.6 in.)
Efficiency (4π)
²³⁹Pu: 17.5%
⁹⁹Tc: 10%
⁹⁰Sr/⁹⁰Y: 17.5%
Typical Background (10 µR/hr field)
Alpha: 3 cpm or less
Beta: 300 cpm or less
Crosstalk
Alpha to Beta: 10% or less
Beta to Alpha: 1% or less
Detector Uniformity 10% or less from average reading
Gamma Sensitivity approx. 20 cpm per µR/hr
Photomultiplier Tube 38 mm (1.5 in.) diameter
Operating Voltage typically 500 to 1000 V (1500 V max.)
Temperature Range -20 to 50 °C (-4 to 122 °F)
Environmental Rating IP rating of 63
Connector Series "C" (others available)
Construction Aluminum with beige powder coating
Size (H x W x L) 10 x 10 x 33 cm (4 x 4 x 12.25 in.)
Weight 0.68 kg (1.5 lbs)