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Fortaleza Radiocarbon Measurements I

Published online by Cambridge University Press:  18 July 2016

M Marlucia F Santiago,
Joaquim Raul Torquato and
Heinz St Räde
M Marlucia F Santiago
Affiliation:
Department of Physics, UFCe Fortaleza, Brazil
Joaquim Raul Torquato
Affiliation:
Department of Physics, UFCe Fortaleza, Brazil
Heinz St Räde
Affiliation:
Nuclear Research Center (KFA) Jülich, West Germany
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This date list covers a selection of 14C results of hydrologic samples investigated from January 1978 until August 1979. According to convention, the ages were calculated with a 14C half-life of 5568 yr and 0.95% of the activity of NBS oxalic acid standard and are quoted in years before 1950. The recent activity of water is assumed to be 90% modern (Geyh and Kreysing, 1973) and corrections for 12C/13C isotopic fractionation have not been made.

Information

Type
Date Lists
Information
Radiocarbon , Volume 22 , Issue 4 , 1980, pp. 1031 - 1033
Copyright
Copyright © The American Journal of Science 

References

Geyh, M A, 1967, Experience gathered in the construction of low-level counters, in IAEA symposium, Proc: Monaco, 2-10 March 1967, p 575–591.Google Scholar
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Barker, Harold, 1953, Radiocarbon dating: large-scale preparation of acetylene from organic material: Nature, v 172, p 631–632.CrossRefGoogle Scholar
Crathorn, A R, 1953, Use of an acetylene-filled counter for natural radiocarbon: Nature, v 172, p 632–633.CrossRefGoogle Scholar