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Geological Survey of Canada Radiocarbon Dates IX

Published online by Cambridge University Press:  18 July 2016

J. A. Lowdon  and
W. Blake Jr.
J. A. Lowdon
Affiliation:
Geological Survey of Canada, Ottawa, Canada
W. Blake Jr.
Affiliation:
Geological Survey of Canada, Ottawa, Canada
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Both the 2-L counter, described in GSC I (Radiocarbon, 1962, v. 4, p. 13–26), and the 5-L counter (GSC IV, Radiocarbon, 1965, v. 7, p. 24–46) were operated routinely during the past year. Approximately half the determinations reported were obtained from each counter. The 2-L counter was operated at 2 atm except for August and September, 1968, when it was operated for the first time at 1 atm. This allowed for the counting of most small samples without the necessity of mixing with dead gas. The 5-L counter was operated at 1 atm, except for the same period when it was operated at 4 atm. Carbon dioxide is used as the counting gas, and both counters are of the proportional type.

Type
Research Article
Information
Radiocarbon , Volume 12 , Issue 1 , 1970 , pp. 46 - 86
Copyright
Copyright © The American Journal of Science 

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