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Gakushuin Natural Radiocarbon Measurements VIII

Published online by Cambridge University Press:  18 July 2016

Kunihiko Kigoshi
Affiliation:
Faculty of Science, Gakushuin University, Mejiro, Toshimaku, Tokyo, Japan
Nobuko Suzuki
Affiliation:
Faculty of Science, Gakushuin University, Mejiro, Toshimaku, Tokyo, Japan
Hiroko Fukatsu
Affiliation:
Faculty of Science, Gakushuin University, Mejiro, Toshimaku, Tokyo, Japan
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This list continues Gakushuin VII (R., 1969, v. 11, p. 295–362); the same instruments and techniques were employed. Age calculations are based on the Libby half-life of C14, 5570 ± 30 years, and the modern activity given by 95% of the activity of NBS oxalic acid standard. Errors quoted are the standard deviation obtained from the number of counts only. When observed activity is less than 2σ above background, infinite date is given with a limit corresponding to the activity of 3σ. For shell samples, dates are computed without any correction for environmental and biological isotopic fractionation. The description and comments are essentially those of the submitters.

Type
Research Article
Copyright
Copyright © The American Journal of Science 

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