@article{oai:nagoya.repo.nii.ac.jp:00011480, author = {山田, 淳子 and Yamada, Junko and 平沢, 政広 and Hirasawa, Masahiro and 中村, 俊夫 and Nakamura, Toshio and 井垣, 謙三 and Igaki, Kenzo and 小田, 寛貴 and Oda, Hirotaka and 青木, 浩 and Aoki, Hiroshi}, journal = {名古屋大学加速器質量分析計業績報告書}, month = {Mar}, note = {The ^<14>C dating are made of medieval and ancient iron tools of which historical documents are not available. Carbon contained in iron and steel samples are extracted as CO_2 by means of a combustion method. In a series of preliminary experiments, ^<14>C dating of the iron and steel analytical standard samples (distributed by The Iron and Steel Institute of Japan) are made. The ^<14>C data of the standard samples ranges from 20000 to 31000yrBP, which assures that the contamination from atmosphere is negligible in the C extraction process of the present study. The results of the dating of the medieval and ancient iron samples are as follows (unit calAD) : a cramp used in the south gate of Saidaiji temple in Nara (constructed in Kamakura era) 1434 (1446) 1475 ; a cramp of unspecified origin (estimated to be of Muromachi era) 1450 (1482) 1523,1563 () 1630 ; iron plate used in a pagoda of Honzanji temple in Okayama 1529 () 1545,1634 (1650) 1655 ; a blade of an old sword made in Tohoku district of Japan 1279 (1289) 1301., タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 1996 (平成8)年度}, pages = {267--270}, title = {中世・古代鉄器の年代測定}, volume = {8}, year = {1997} }