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The Exploranium GR-256 is a portable 256 channel spectrometer used to record and analyze the Gamma Ray Spectrum.
The 256 channels are spread equally over the entire Gamma Ray Spectrum of interest, thus all discrete phenomena may be studied.
The GR-256 has been designed as a versatile tool for a wide range of applications including - ground radiometric surveys for
uranium, portable vehicle surveys for hydrocarbon, small airborne survey systems, laboratory data analysis, core logging s
ervices etc. The instrument is normally supplied with a 21 cubic inch detector (0.35L) but directly interfaces into 112
cubic inch and 256 cubic inch detectors. Via a special Exploranium interface a
large variety of other multiple detectors, as well as such speciality units as borehole logging probes, may be used.
The GR-256 makes gain control essentially AUTOMATIC, a very critical feature for high accuracy Gamma Ray data
analysis. It was the first spectrometer to internally store data conversion/correction
constants to allow display of data in conventional counts/time period or directly in ppm eU, eTh and % K.
Previous instruments were limited to typically 4 windows, often permanently located in the spectrum, to record the natural isotopes of Uranium, Potassium and Thorium.
The GR-256 allows selection of 8 windows which may be located anywhere in the spectrum with any channel width.
The instrument may also be connected directly to a CRT display for real time spectrum analysis. Stored spectra may be also be plotted on an analog chart recorder.
Specifications for the system are shown below:
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