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AN UPDATE ON THE PERFORMANCE OF THE IN SITU 14C EXTRACTION LINE AT THE UNIVERSITY OF BERN

Published online by Cambridge University Press:  26 May 2020

M U Sliz Open the ORCID record for M U Sliz [Opens in a new window] ,
C Espic ,
B A Hofmann ,
I Leya  and
S Szidat
M U Sliz*
Affiliation:
Space Research and Planetary Sciences, University of Bern, Sidlerstrasse 5, Bern3012, Switzerland Natural History Museum Bern, Bernastrasse 15, Bern3005, Switzerland
C Espic
Affiliation:
Department of Chemistry and Biochemistry & Oeschger Center for Climate Change Research, University of Bern, Freiestrasse 3, Bern3012, Switzerland
B A Hofmann
Affiliation:
Natural History Museum Bern, Bernastrasse 15, Bern3005, Switzerland
I Leya
Affiliation:
Space Research and Planetary Sciences, University of Bern, Sidlerstrasse 5, Bern3012, Switzerland
S Szidat
Affiliation:
Department of Chemistry and Biochemistry & Oeschger Center for Climate Change Research, University of Bern, Freiestrasse 3, Bern3012, Switzerland
*
*Corresponding author. Email: malgorzata.sliz@space.unibe.ch.
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Abstract

We present the current performance of the in situ radiocarbon (14C) extraction line at the University of Bern with an improved extraction and combustion system. After three major steps of improvement, the extraction of sample CO2 gas now takes place inside a platinum crucible, supported by an outer quartz-glass crucible. This setup allows us to operate the line as a closed system for several samples without breaking the vacuum. Measurements of procedural blanks and samples from our reference strewn field, Jiddat al Harasis 073, performed in our system all show a good reproducibility and, for the strewn field samples, consistency with published data. We describe each improvement step in detail, discussing the advantages and disadvantages of all tested setups. By sharing our knowledge, we aim to inform and prevent others from making the same or similar detours in establishing 14C extraction systems for extraterrestrial samples.

Keywords

meteoritesradiocarbon datingterrestrial age
Type
Research Article
Information
Radiocarbon , Volume 62 , Issue 5 , October 2020 , pp. 1371 - 1388
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Copyright
© 2020 by the Arizona Board of Regents on behalf of the University of Arizona

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References

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