Model 44-20 Gamma Scintillator

The Model 44-20 is an integral 3 in. X 3 in. NaI(Tl) gamma scintillator that can be used with several different instruments including survey meters, scalers, ratemeters, and alarm ratemeters

Indicated Use High sensitivity gamma measurements, gamma survey
Detector Type NaI(Tl) scintillator, 7.6 cm (3 in.) dia. x 7.6 cm (3 in.) thick
Typical Sensitivity (¹³⁷Cs gamma) 2300 cpm per µR/hr
Efficiency ¹²⁵I: 29%
Energy Response Energy dependent
Typical Background (10 µR/hr field) 23 kcpm
Photomultiplier Tube 7.6 cm (3 in.) diameter
Operating Voltage 500 to 1200 V (typical)
Connector Series "C"
Construction Integral-line
Housing Construction 0.05 cm (0.20 in.) thick aluminum
Size (D x L) 8.3 x 28.7 cm (3.3 x 11.3 in.)
Weight 1.7 kg (3.7 lb)