137CS gamma-ray detection at Summit, Greenland
Global fall-out from atmospheric testing of thermonuclear weapons produced horizon markers corresponding to the initiation of testing in 1953 and the maximum fall-out in 1963. The radioactive isotope 137Cs associated with these events has a half-life of 30.2 years. Therefore, with the appropriate ra...
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University of New Hampshire Scholars' Repository
1994
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ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1020 2023-05-15T16:27:26+02:00 137CS gamma-ray detection at Summit, Greenland Dunphy, P. P. Dibb, Jack E. 1994-01-01T08:00:00Z application/pdf https://scholars.unh.edu/earthsci_facpub/21 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1020&context=earthsci_facpub unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/21 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1020&context=earthsci_facpub Earth Sciences Scholarship Atmospheric Sciences text 1994 ftuninhampshire 2023-01-30T21:34:09Z Global fall-out from atmospheric testing of thermonuclear weapons produced horizon markers corresponding to the initiation of testing in 1953 and the maximum fall-out in 1963. The radioactive isotope 137Cs associated with these events has a half-life of 30.2 years. Therefore, with the appropriate radiation detectors, this fall-out can be used as a long-term temporal indicator in glaciers and snowpack. A prototype γ-ray detector system was successfully tested and was used to make in-situ measurements of the 137Cs marker in a borehole at Summit, Greenland. The system consisted of a 7.6 cm by 7.6 cm NaI (Tl) scintillation crystal/photomultiplier detector, commercial pre-amplifier, amplifier and power supplies, and a microcomputer-based pulse-height analyzer. The measurements were made in boreholes of 25.4 cm and 12.7 cm diameter to depths of 22 m. Based on the results reported here, the γ-ray detection technique promises to be a powerful way to locate quickly horizon markers in the field. -Authors Text Greenland University of New Hampshire: Scholars Repository Greenland |
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Open Polar |
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University of New Hampshire: Scholars Repository |
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ftuninhampshire |
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Atmospheric Sciences |
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Atmospheric Sciences Dunphy, P. P. Dibb, Jack E. 137CS gamma-ray detection at Summit, Greenland |
topic_facet |
Atmospheric Sciences |
description |
Global fall-out from atmospheric testing of thermonuclear weapons produced horizon markers corresponding to the initiation of testing in 1953 and the maximum fall-out in 1963. The radioactive isotope 137Cs associated with these events has a half-life of 30.2 years. Therefore, with the appropriate radiation detectors, this fall-out can be used as a long-term temporal indicator in glaciers and snowpack. A prototype γ-ray detector system was successfully tested and was used to make in-situ measurements of the 137Cs marker in a borehole at Summit, Greenland. The system consisted of a 7.6 cm by 7.6 cm NaI (Tl) scintillation crystal/photomultiplier detector, commercial pre-amplifier, amplifier and power supplies, and a microcomputer-based pulse-height analyzer. The measurements were made in boreholes of 25.4 cm and 12.7 cm diameter to depths of 22 m. Based on the results reported here, the γ-ray detection technique promises to be a powerful way to locate quickly horizon markers in the field. -Authors |
format |
Text |
author |
Dunphy, P. P. Dibb, Jack E. |
author_facet |
Dunphy, P. P. Dibb, Jack E. |
author_sort |
Dunphy, P. P. |
title |
137CS gamma-ray detection at Summit, Greenland |
title_short |
137CS gamma-ray detection at Summit, Greenland |
title_full |
137CS gamma-ray detection at Summit, Greenland |
title_fullStr |
137CS gamma-ray detection at Summit, Greenland |
title_full_unstemmed |
137CS gamma-ray detection at Summit, Greenland |
title_sort |
137cs gamma-ray detection at summit, greenland |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
1994 |
url |
https://scholars.unh.edu/earthsci_facpub/21 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1020&context=earthsci_facpub |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/21 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1020&context=earthsci_facpub |
_version_ |
1766016604878929920 |