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A New Graphitization System for Radiocarbon Dating with AMS in the Dendrochronological Laboratory at AGH-UST Kraków

Published online by Cambridge University Press:  02 August 2018

Marek Krąpiec ,
Andrzej Rakowski ,
Matthias Huels Open the ORCID record for Matthias Huels [Opens in a new window] ,
Damian Wiktorowski  and
Christian Hamann
Marek Krąpiec
Affiliation:
AGH University of Science and Technology (AGH-UST), Mickiewicza Av. 30, 30-059 Krakow, Poland
Andrzej Rakowski*
Affiliation:
Institute of Physics - CSE, Silesian University of Technology, Konarskiego 22B str., 44-100 Gliwice, Poland
Matthias Huels
Affiliation:
Leibniz-Laboratory, University of Kiel, Max-Eyth-Str. 11-13, 24118 Kiel, Germany
Damian Wiktorowski
Affiliation:
AGH University of Science and Technology (AGH-UST), Mickiewicza Av. 30, 30-059 Krakow, Poland
Christian Hamann
Affiliation:
Leibniz-Laboratory, University of Kiel, Max-Eyth-Str. 11-13, 24118 Kiel, Germany
*
*Corresponding author. Email: arakowski@polsl.pl.
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Abstract

A new vacuum system for the preparation of graphite samples for radiocarbon (14C) measurement using an accelerator mass spectrometer (AMS) was constructed at the Dendrochronological Laboratory in AGH-UST Kraków. The central part of the system is a manual vacuum line for the production of graphite from carbon dioxide for subsequent AMS measurements. The graphitization system can handle up to five samples simultaneously, and the process lasts for approximately 1 hour. The graphitization line was built to support the preparation of wood samples for a project dedicated to dating a subfossil tree from the Younger Dryas period. For this purpose, the chemical preparation procedure for wood samples was optimized to obtain more reliable results. This includes the extraction of α-cellulose to increase the precision of the age determination. The performance of the system was tested with NIST OxII, IAEA standards (IAEA C3, C5, C6, and C8), and background samples. The results of the 13 samples of subfossil wood were tested and are presented. The methodology gives good reproducibility of results obtained for the samples prepared using this system.

Keywords

AMSradiocarbon measurementsgraphitization systemsample preparation
Type
Instrumentation
Information
Radiocarbon , Volume 60 , Issue 4: 2nd Radiocarbon in the Environment Conference Debrecen, Hungary, July 3–7, 2017 Part 1 of 2 , August 2018 , pp. 1091 - 1100
Copyright
© 2018 by the Arizona Board of Regents on behalf of the University of Arizona 

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