Ludlum Medical Physics Model 44-9
Alpha Beta Gamma Radiation Detector
Introduction
The Model 44-9 is a pancake G-M radiation detector that can be used with
several different instruments including radiation survey meters, scalers, ratemeters, and alarm ratemeters.
Specifications
PART
NUMBER: 47-1539
INDICATED USE: Alpha, beta, gamma radiation survey; sample counting
DETECTOR: Pancake type halogen quenched GM
WINDOW: 1.7 + 0.3 mg/cm2 mica
WINDOW AREA: 15 cm2 active, 12 cm2 open
EFFICIENCY (4pi): 5%-14C; 22%-90Sr/90Y; 19%-99Tc; < 1%-99mTc,
32%-32P; 15%-239Pu
SENSITIVITY (137Cs gamma): 3300 cpm/mR/hr
ENERGY RESPONSE: Energy dependant
BACKGROUND: 60 cpm
DEAD TIME: 80 microseconds
OPERATING VOLTAGE: 900 volts
CONSTRUCTION: Painted aluminum housing
SIZE: 1.8" H x 2.7" W x 10.7" L (4.6 x 6.9 x 27.2 cm)
WEIGHT: 1 lb (0.5 kg)
Other Ludlum Medical Physics Products
Ludlum Medical Physics Information
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