期刊
RADIOCARBON
卷 56, 期 3, 页码 1189-1194出版社
UNIV ARIZONA DEPT GEOSCIENCES
DOI: 10.2458/56.17769
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [22340144]
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [26287042, 22340144] Funding Source: KAKEN
A rapid yearly increase in the radiocarbon content has been detected for the period from AD 993 to 994. However, this event is supported by the C-14 measurements of only one cedar tree sample, and verification is necessary to confirm this event more reliably. For this purpose, this study measured the C-14 content in Japanese Hinoki tree rings corresponding to the period from AD 988 to 997 using the accelerator mass spectrometry system at Yamagata University (YU-AMS). The result shows a significant C-14 increase from AD 993 to 994, and is consistent with the previously measured data for the Japanese cedar tree. This marks the second case detecting an increased C-14 level corresponding to the AD 994 event.
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