Ludlum Model 44-88
Alpha, Beta, Gamma GM Detector
Indicated Use: Alpha, beta, gamma 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; 32%-32P; 15%-239Pu
Sensitivity (137Cs gamma): 3300 cpm/mR/hr
Energy Response: Energy dependent
Background: 60 cpm
Dead Time: 80 microseconds
Operating Voltage: 900 volts
Construction: Painted Aluminum housing
Connector: Series “C” (others available)
Temperature Range: -4° F to 122° F (-20° C to 50° C)
Size: 2.3” diameter x 2.8” L (5.7 x 7 cm)
Weight: .5 lbs (0.2 kg)
Ludlum Measurements, Inc. manufactures many different types of detectors to measure
alpha, beta, gamma, and neutron radiation.
Geiger-Mueller (GM) Detectors employ an electric field that causes the tube to discharge
when radiation ionizes a neutral gas molecule. Depending on the construction they can be
used to detect alpha, beta, and/or gamma radiation. These detectors are popular due to
their low cost and ease of operation. However, they do have a long dead time and are not
capable of energy discrimination.
Other types of detectors are Proportional Detectors and Scintillation Detectors.
Common Specifications for all Detectors:
Connector: Series “C” (others available)
Construction: Aluminum housing with beige powder coat paint
Temperature Range: -4° F to 122° F (-20° C to 50° C). May be certified for operation from -
40° F to 150° F (-40° C to 65° C).
Note: All efficiencies and sensitivities are typical and different detectors may vary.
Click Here to Download a Printable Information Sheet. (.pdf format)
|
