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British Museum Natural Radiocarbon Measurements III

Published online by Cambridge University Press:  18 July 2016

Harold Barker  and
John Mackey
Harold Barker
Affiliation:
Research Laboratory, British Museum, London W.C.I.
John Mackey
Affiliation:
Research Laboratory, British Museum, London W.C.I.
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The third series of radiocarbon measurements made at the British Museum Research Laboratory is reported in the following list. Equipment and method used are as described previously (British Museum I) and, as in previous lists, the error terms are not based solely on counting statistics, but are widened to include contributions of ±80 years for possible isotopic fractionation effects and ±100 years for the de Vries effect. Ages are calculated on a half-life of 5568 ± 30 years. NBS oxalic acid is now used as a reference standard in place of 100-yr-old oak. The latter gave an age-corrected value almost exactly 95% of the oxalic-acid activity and thus no corrections are required to our previous date lists to bring them into line with the new standard.

Type
Research Article
Information
Radiocarbon , Volume 3 , 1961 , pp. 39 - 45
Copyright
Copyright © The American Journal of Science 

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