2012 Fiscal Year Final Research Report
Determination of absolute ages of annual scale GCR enhancements during the Maunder Minimum based on high precision measurements of radiocarbon content in tree rings
| Project/Area Number |
23654080
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Research Collaborator |
TOKANAI Fuyuki 山形大学, 理学部, 教授 (80323161)
HORIUCHI Kazuho 弘前大学, 理工学研究科, 助教 (00344614)
YOKOYAMA Yusuke 東京大学, 大気海洋研究所, 准教授 (10359648)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 宇宙線 / 太陽活動 / 宇宙線生成核種 / 炭素 14 / 宇宙気候学 |
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| Research Abstract |
We have conducted multiply-repeated measurements of radiocarbon content in annually separated tree rings using the Accelerator Mass Spectrometer at Yamagata University, in order to improve the precision of radiocarbon measurement and to determine the absolute ages of annual-scale GCR events during the Maunder Minimum. We have successfully achieved four times higher precision.
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Research Products
(22 results)
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[Journal Article] Present Status of theYU-AMS system2013
Author(s)
Tokanai, F., Kato, K., Anshita M., Sakurai, H., Izumi, A. Toyoguchi, T., Kobayashi, T., Miyahara, H., Ohyama, M.and Hoshino, Y.
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Journal Title
Yamagata University, Radiocarbon
Volume: 55
Pages: 3-4
Peer Reviewed
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[Journal Article] McCracken K.G., Oerter H., Wilhelms F., 9,400 years of cosmic radiation and solar activity from ice cores and tree rings2012
Author(s)
Steinhilber F., Abreu J., Beer J., Brunner I., Christl M., Fischer H., Heikkila U., Kubik P., Mann M., Miller, H., Miyahara H.
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Journal Title
Proc. Natl. Acad. Sci
Volume: 109
Pages: 5967-5971
DOI
Peer Reviewed
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