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Using a Gas Ion Source for Radiocarbon AMS and GC-AMS

Published online by Cambridge University Press:  18 July 2016

Christopher Bronk Ramsey,
Peter Ditchfield and
Martin Humm
Christopher Bronk Ramsey*
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, United Kingdom.
Peter Ditchfield
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, United Kingdom.
Martin Humm
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, United Kingdom.
*
Corresponding author. Email: christopher.ramsey@archaeology-research.oxford.ac.uk.
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Abstract

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This paper reports on the performance of a new method of sample injection using the High Voltage Engineering Europa (HVEE) SO-110 ion source jointly developed between HVEE and Oxford. In order to use this source, we have developed a new gas handling system which works on the direct injection of carbon dioxide mixed into a continuous flow of helium. Preliminary work has also been carried out on online gas chromatography-accelerator mass spectrometry (GC-AMS). In this application, a GC is directly coupled to the AMS system using a GC-IRMS combustion interface and Nafion™ drier. We show here results for the measurement of natural abundance in separated compounds with good peak separation and precisions of about 10%. This type of system should be ideal for source apportionment studies, biomedical, and other similar work where high precision is not required but where sample sizes are very low.

Information

Type
Articles
Information
Radiocarbon , Volume 46 , Issue 1: Proceedings of the 18th International Radiocarbon Conference (Part 1 of 2), Conference Editors: Nancy Beavan Athfield, Rodger J Sparks , 2004, pp. 25 - 32
Copyright
Copyright © 2004 by the Arizona Board of Regents on behalf of the University of Arizona 

References

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