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AMS-$$^{14}$$C measurement of 670-year-old giant Japanese cedar - 1871-2020 CE

坂本 稔*; 箱崎 真隆*; 藤田 奈津子   ; 國分 陽子   

Sakamoto, Minoru*; Hakozaki, Masataka*; Fujita, Natsuko; Kokubu, Yoko

2020年7月に倒壊した岐阜県瑞浪市大湫町の大湫神明神社の境内にあったスギの主幹部には、415本の年輪が確認された。国立歴史民俗博物館で試料を短冊状に切り出し、漂白して板状の年輪セルロースを得た。セルロースを1年輪ずつ分離し、東濃地科学センターでグラファイト化とAMSによる$$^{14}$$C測定を実施した。

On July 11, 2020, a giant Japanese cedar in the precincts of the Okute Shinmei Shrine in Okute-cho, Mizunami City, Gifu Prefecture, collapsed due to heavy rain. The main trunk of the tree had 415 tree rings. At the National Museum of Japanese History (NMJH), the butt end of the tree was cut into strips and bleached to obtain cellulose in the form of plates. The cellulose was separated yearly, graphitized, and measured for radiocarbon by AMS at the Tono Geoscience Center of the Japan Atomic Energy Agency (JAEA).

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