Ludlum Measurements 44-2, Manual

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Model 44-2 Gamma Scintillator
Ludlum Measurements, Inc. Page 3 February 2018
Specifications
Compatible Instruments
: general-purpose survey meters,
ratemeters and scalers
Sensitivity
: typically 175 cpm per µR/hr (
137
Cs gamma)
Dead Time:
approximately 10 µs, typically limits linear range to
5 mR/hr (50 µSv/h) with non-corrected
measurements, or to 50 mR/hr (500 µSv/h) with
electronics equipped with dead time correction
Energy Response
: energy dependent
Background:
1800 cpm
Operating Voltage
: 500–1200 volts
Dynode String Resistance
: 100 megohm
Connector
: series
˝
C
˝
(others available)
Scintillator
: 2.5 x 2.5 cm (1 x 1 in.) Dia. x thickness)
Tube
: 2.9 cm (1.1 in.) diameter magnetically shielded
photomultiplier
Efficiency (4
π
):
125
I is 7%;
57
Co is 10%;
137
Cs is 3%;
60
Co is 3%
Construction
: aluminum housing with beige powder-coat
finish
Temperature Range
: -15 to 50 °C (5 to 122 °F); may be
certified for -40 to 65 °C (-40 to 150 °F)
Size
: 5.1 x 18.5 cm (2 x 7.3 in.) (Dia. x L)
Weight
: 0.5 kg (1 lb)