Ludlum Measurements 44-2, Manual

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Model 44-2 Gamma Scintillator
Ludlum Measurements, Inc. Page 1 February 2018
Introduction
The Model 44-2 sodium iodide (NaI) gamma scintillator is
primarily used for detecting low levels of gamma radiation in
the range of 20 keV–1.5 MeV. It consists of a 2.54 x 2.54 cm (1
x 1 in.) (Dia. X thickness) NaI crystal coupled to a
photomultiplier tube and is housed in a 0.157 cm (0.062 in.)
thick aluminum housing. The front entrance window has a total
thickness of 2.3 mm (0.09 in.) of aluminum. The detector is
energy dependent, over-responding by a factor of 10 or greater
in the 100keV range and under-responding by a factor of 0.5
above 1 MeV when normalized to
137
Cs.
The Model 44-2 will operate with any Ludlum instruments or
equivalent instruments that provide 500–1200 volts. The
recommended instrument input sensitivity is approximately 10
mV or higher.
Some common applications for this detector include
background radiation monitoring, low-level radiation detection,
and spectrum analysis when used in conjunction with a single-
or multi-channel analyzer.
Model 44-2
Note:
The detector does not contain any consumable materials.