| 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%. |
| Genre: | Article |
| ProdID: | 70011167 |
| Citation Author: | Senftle, F. E.; Moxham, R. M.; Tanner, A. B.; Boynton, G. R.; Philbin, P. W.; Baicker, J. A. |
| Citation Contributing Office: | Mineral Resources Program |
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| Citation End Page: | 380 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Nuclear Instruments and Methods |
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| Citation Phsyical Description: | 10 p. |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Intrinsic germanium detector used in borehole sonde for uranium exploration; 1976; Article; Journal; Nuclear Instruments and Methods; Senftle, F. E.; Moxham, R. M.; Tanner, A. B.; Boynton, G. R.; Philbin, P. W.; Baicker, J. A. |
| Citation Start Page: | 371 |
| Citation Volume: | 138 |
| Citation Year: | 1976 |
| Type: | citation/reference |
| Text: | Intrinsic germanium detector used in borehole sonde for uranium exploration; 1976; Article; Journal; Nuclear Instruments and Methods; Senftle, F. E.; Moxham, R. M.; Tanner, A. B.; Boynton, G. R.; Philbin, P. W.; Baicker, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0029-554X(76)90047-1 |
| Date Other: | Thu, 1 Jan 1976 00:00 -0600 |
| Publisher: | Elsevier |
