@article{oai:nagoya.repo.nii.ac.jp:00011575,
 author = {吉沢, 康和 and Yoshizawa, Yasukazu},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {The radiocarbon ages of seven old sutras were measured by using Tandetron at Nagoya University. The hand-copied complete collection of Buddhist Sutras and the xylographic ones are owned by the Shinto Shrine "Mitsuki-Hachimangu" in Mihara, Hiroshima Prefecture. Three samples were taken from three fragments of the hand-copied sutras, and one sample from a fragment of the xylographic sutras. In addition, the ages of five sutras, which had dates when we obtained them, were measured by the same method. These five sutras are taken from our collection in which the ages of sutras are known. Small samples were taken from the five collected sutras. The measured ^<14>C ages of three fragments of the hand-copied sutras are BP 795±26,703±23 and 874±15,and the ^<14>C age of the xylographic sutras is BP 559±49. These values were transformed to AD ages by using the radiocarbon age calibration curve. Calibrated ages are AD 1260^<+18>_<-31>, 1292^<+6>_<-5> and 1186^<+28>_<-18> for the hand-copied sutras, and AD 1405^<+21>_<-20> for the xylographic sutras. The ages of three fragments of the hand-copied sutra in the shrine are different from each other beyond uncertainties. The measured ^<14>C ages of two oldest sutras, which are dated on the Tenpyo period (AD 729-766), are BP 1229±43 and 1230±35. The ages are transformed into AD 786^<+96>_<-22> and 786^<+91>_<-13>. The agreement between observed ages of two Tenpyo sutras is very good, but these values do not agree with the dated ages. The ^<14>C ages of other three sutras with the dated ages of AD 1158,1285 and 1410 are BP 895±74,738±50 and 505±53,respectively. These ages are calibrated to be AD 1166^<+63>_<-134>, 1284^<+12>_<-17> and 1428^<+15>_<-22>, respectively. The ages of the three sutras are in good agreement with the dated ages. In conclusion, the hand-copied sutras seem to have been written in many years from the end of the Heian period to the kamakura period. The xylographic sutra was printed at the beginning of the Muromachi period. The measured ages of three dated sutras are in good agreement with the dated ages. This fact shows that our dating is good and the calibration curve is applicable to the dating of old Japanese paper in this region. But the agreement between our dating result and dated age is not good enough in the Tenpyo period., 第11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10 (1998)年度)報告 名古屋大学タンデトロン加速器質量分析計第1号機の研究実績と1号機,2号磯の利用計画},
 pages = {68--76},
 title = {古経典の<14>^C年代測定},
 volume = {10},
 year = {1999}
}