@article{oai:nagoya.repo.nii.ac.jp:00011503,
 author = {奥村, 晃史 and Okumura, Koji and 小疇, 尚 and Koaze, Takashi and 石井, 正樹 and Ishii, Masaki and 松島, 信幸 and Matsushima, Nobuyuki and 寺岡, 義治 and Teraoka, Yoshiharu},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {Radiocarbon dating is one of the most useful dating methods for historic age within a few thousand years. However, the dates are in most cases not precise enough to correlate a dated event with historic records, for common standard deviation (1σ) of 40 to 80 years results in dedndrocorrected age range of more than 100 calendar years. To reduce this uncertainty wiggle matching was applied to trunk samples from central Japan. The dates might indicate timing of earthquakes. One sample named IDF from under debris flow deposits near Iida, Nagano had about 100 tree rings. The 30th, 35th, 40th, 50th, 60th, and 75th single rings counting from the outermost ring are dated by AMS method. 40 to 60 year standard deviation (1σ) of conventional dates brought 30 to 110 calendar year age ranges prior to wiggle matching. Numerical wiggle matching based on Bayesian rules in Oxcal v2.18 reduced this unceratinty to 12 years. The outermost ring of the IDF sample is hence estimated as between 1459 and 1471 AD with 68.2% confidence or between 1451 and 1478 AD with 95.4% confidence. This well-constrained result is mostly owing to the steep inclination of the calibration curve in the period between 1380 and 1450 AD. Another sample named OTR trunk lied in the lowest part of landslide-induced lake deposits along the Hime-river in Itoigawa city, Niigata. The age of the death and burial of the tree is probably comparable with the age of the landslide itself. From the 50 rings of the trunc sample, the outermost, 5th, 10th, 20th, 30th, and 40th rings were dated by AMS method. Wiggle matching for this sample did not significantly refined the dendrocorrected dates as the conventional dates do not match well with the calibration curve and the dates are located right on a distinct wiggle of the curve around 1370 AD. The estimated age of the outermost ring is 1315 to 1335 and 1395 to 1415 AD with 68.2% confidence or 1300 to 1350 and 1380 to 1430 with 95.4% confidence. For both dates there is no known historic record on an earthquake or landslides. Further collection and high-precision dating of samples of similar age and area to these samples will help to reconstruct the events., 第10回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成9 (1997)年度)報告 ｢最新型タンデトロン加速器質量分析計(加速器年代測定システム)による高精度･高分解能14C年代測定の利用分野･方法の開拓(II)｣},
 pages = {64--75},
 title = {Wiggle Matchingを用いた中世樹幹試料の高精度年代決定},
 volume = {9},
 year = {1998}
}