Environmental Restoration Group

Ludlum Model 44-17
Ludlum Specifications
INDICATED USE: 125I and low energy gamma survey
ENERGY RESPONSE: Energy dependent
SUGGESTED INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
OPERATING VOLTAGE: Typically 500 - 1200 volts
SCINTILLATOR: 2" (5.1 cm) diameter 2 mm thick Nal(TI) crystal
ENTRY WINDOW: 43 mg/cm2
WINDOW AREA: 17.8 cm2 active and open
BACKGROUND (10 R/hr): 600 cpm
EFFICIENCY (4pi): 20% - 129I
SENSITIVITY: 2500 cpm/R/hr (125I)
RECOMMENDED ENERGY RANGE: 10 - 200 keV
PHOTOMULTIPLIER TUBE: 1.5" (3.8 cm) diameter
SIZE: 2.6" diameter x 9" L (6.7 x 22.9 cm)
WEIGHT: 1.5 lbs. (0.7 kg)
8809 Washington St. NE Suite 150
Albuquerque, NM 87113
Tel: (505) 298-4224
Fax: (505) 797-1404