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Birmingham University Radiocarbon Dates VI

Published online by Cambridge University Press:  18 July 2016

F. W. Shotton  and
R. E. G. Williams
F. W. Shotton
Affiliation:
The University of Birmingham, Birmingham, England
R. E. G. Williams
Affiliation:
The University of Birmingham, Birmingham, England
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The following list comprises results obtained during 1971 from both the 1 L and 6 L proportional gas counters at pressures of 1 to 3 atm of methane. Age calculations are based on 95% activity of NBS oxalic acid standard and computed from the Libby half-life of 5570 ± 30 yr. Background samples are synthesized from Welsh anthracite. Errors quoted refer only to the standard deviation (1σ) calculated from a statistical analysis of sample, background, and standard count rates. Recently a Micromass 6 mass spectrometer was installed in the Radiocarbon Dating Laboratory which will enable C13 measurements on future samples. Pretreatment is continued as described previously (R., 1969, v. 11, p. 263) but in cases where sample size was insufficient for full pretreatment, details are described.

Type
Research Article
Information
Radiocarbon , Volume 15 , Issue 1 , 1973 , pp. 1 - 12
Copyright
Copyright © The American Journal of Science 

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