Radiocarbon Activity Variation in Dated Tree Rings Grown in Mackenzie Delta
- 1 January 1983
- journal article
- Published by Cambridge University Press (CUP) in Radiocarbon
- Vol. 25 (2) , 205-212
- https://doi.org/10.1017/s003382220000549x
Abstract
Forty-five tree rings (1881–1925) were taken from a white spruce grown near Campbell River in Mackenzie Delta, Canada, for the measurement of 14C activity variation. Because of the narrowness of the rings, 2 and sometimes 3 rings were combined to yield a total of 21 specimens. The 14C content in these specimens was measured with a liquid scintillation-PM tube counter system of the History Department of Peking University. The data points exhibit a 10‰ variation, anti-correlated with sunspot numbers. The physical implication is discussed.Keywords
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