Model 44-3 Low Energy Gamma Scintillator

The Model 44-3 is a 1 inch X 1mm NaI(Tl) Gamma Scintillator for low energy gamma that can be used with several different instruments including survey meters, scalers, ratemeters, and alarm ratemeters. The probe is ideal for nuclear medicine applications.

Indicated Use ¹²⁵I and low-energy gamma survey
Detector Type NaI(Tl) scintillator, 2.5 cm (1 in) dia. x 0.1 cm (0.04 in) thick
Window 18.4 mg/cm²
Window Area Active: 5 cm² (0.8 in2), Open: 5 cm² (0.8 in²)
Efficiency (4π)
¹²⁵I: 33.5% (derived from 129I efficiency)
¹²⁹I: 18%
Typical Sensitivity (¹²⁵I) 675 cpm per µR/hr
Typical Background (10 µR/hr field) 300 cpm
Recommended Energy Range 10 to 60 keV
Energy Response Energy dependent
Photomultiplier Tube 3.8 cm (1.5 in) diameter
Operating Voltage 500 to 1200 V (typical)
Connector Series "C"
Construction Aluminum housing with beige powder coat
Size (D x L) 5.1 x 17.8 cm (2 x 7 in)
Weight 0.5 kg (1 lb)