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Intrinsic germanium detector used in borehole sonde for uranium exploration

Nuclear Instruments and Methods

By:
, , , , ,
DOI: 10.1016/0029-554X(76)90047-1

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Abstract

A borehole sonde (~1.7 m long; 7.3 cm diameter) using a 200 mm2 planar intrinsic germanium detector, mounted in a cryostat cooled by removable canisters of frozen propane, has been constructed and tested. The sonde is especially useful in measuring X- and low-energy gamma-ray spectra (40–400 keV). Laboratory tests in an artificial borehole facility indicate its potential for in-situ uranium analyses in boreholes irrespective of the state of equilibrium in the uranium series. Both natural gamma-ray and neutron-activation gamma-ray spectra have been measured with the sonde. Although the neutron-activation technique yields greater sensitivity, improvements being made in the resolution and efficiency of intrinsic germanium detectors suggest that it will soon be possible to use a similar sonde in the passive mode for measurement of uranium in a borehole down to about 0.1% with acceptable accuracy. Using a similar detector and neutron activation, the sonde can be used to measure uranium down to 0.01%.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Intrinsic germanium detector used in borehole sonde for uranium exploration
Series title:
Nuclear Instruments and Methods
DOI:
10.1016/0029-554X(76)90047-1
Volume
138
Issue:
2
Year Published:
1976
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Mineral Resources Program
Description:
10 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
371
Last page:
380