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Current 14C Measurements with the University of Washington FN Tandem Accelerator

Published online by Cambridge University Press:  18 July 2016

G W Farwell ,
P M Grootes ,
D D Leach ,
F H Schmidt  and
Minze Stuiver
G W Farwell
Affiliation:
Nuclear Physics Laboratory and Quaternary Isotope Laboratory, University of Washington, Seattle, Washington 98195
P M Grootes
Affiliation:
Nuclear Physics Laboratory and Quaternary Isotope Laboratory, University of Washington, Seattle, Washington 98195
D D Leach
Affiliation:
Nuclear Physics Laboratory and Quaternary Isotope Laboratory, University of Washington, Seattle, Washington 98195
F H Schmidt
Affiliation:
Nuclear Physics Laboratory and Quaternary Isotope Laboratory, University of Washington, Seattle, Washington 98195
Minze Stuiver
Affiliation:
Nuclear Physics Laboratory and Quaternary Isotope Laboratory, University of Washington, Seattle, Washington 98195
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Abstract

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Our accelerator mass spectrometry (AMS) system shows a one-to-one relationship between sample 14C concentrations determined by AMS - and by β-counting. Measurements of unknown samples against a standard indicate that 14C concentration measurements to better than 2% can be made. For a 30-second data collection interval in a typical run of 100 intervals, the variability of the beam injected into the accelerator is ca 2%, that of the machine transmission is ca 4%, and counting statistics give 4.7% standard deviation for a sample of 80% of modern carbon.

Type
VIII. Technical Aspects of Accelerator Mass Spectrometry
Information
Radiocarbon , Volume 25 , Issue 2: 11th International Radiocarbon Conference , 1983 , pp. 711 - 718
Copyright
Copyright © The American Journal of Science 

References

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