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Comparison of 14C Ages Between LSC and AMS Measurements of Choukai Jindai Cedar Tree Rings at 2600 cal BP

Published online by Cambridge University Press:  18 July 2016

Yui Takahashi
Affiliation:
Graduate School of Science and Engineering, Yamagata University, 1-4-12 Kojirakawa, Yamagata City, Yamagata 990-8560, Japan
Hirohisa Sakurai*
Affiliation:
Graduate School of Science and Engineering, Yamagata University, 1-4-12 Kojirakawa, Yamagata City, Yamagata 990-8560, Japan Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Kayo Suzuki
Affiliation:
Graduate School of Science and Engineering, Yamagata University, 1-4-12 Kojirakawa, Yamagata City, Yamagata 990-8560, Japan
Taiichi Sato
Affiliation:
Graduate School of Science and Engineering, Yamagata University, 1-4-12 Kojirakawa, Yamagata City, Yamagata 990-8560, Japan
Shuichi Gunji
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Fuyuki Tokanai
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Hiroyuki Matsuzaki
Affiliation:
Department of Nuclear Engineering and Management, School of Engineering, University of Tokyo, Tokyo 113-0032, Japan
Yoko Sunohara
Affiliation:
Department of Nuclear Engineering and Management, School of Engineering, University of Tokyo, Tokyo 113-0032, Japan
*
Corresponding author. Email: sakurai@sci.kj.yamagata-u.ac.jp.
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Abstract

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Radiocarbon ages of Choukai Jindai cedar tree rings growing in the excess era of 14C concentrations during 2757–2437 cal BP were measured using 2 types of 14C measurement methods, i.e. liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS). The difference between the 2 methods is 3.7 ± 5.2 14C yr on average for 61 single-year tree rings, indicating good agreement between the methods. The Choukai data sets show a small sharp bump with an average 14C age of 2497.1 ± 3.0 14C yr BP during 2650–2600 cal BP. Although the profile of the Choukai LSC data set compares well with that of IntCal04, having a 14C age difference of 4.6 ± 5.3 14C yr on average, the Choukai LSC 14C ages indicate variability against the smoothed profile of IntCal04.

Type
Calibration, Data Analysis, and Statistical Methods
Copyright
Copyright © 2010 by the Arizona Board of Regents on behalf of the University of Arizona 

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