@article{oai:nagoya.repo.nii.ac.jp:00011845,
 author = {石橋, 浩 and ISHIBASHI, Hiroshi and 三原, 正三 and MIHARA, Shozo and 中村, 俊夫 and NAKAMURA, Toshio and 小池, 裕子 and KOIKE, Hiroko},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {The carved ivory objects which might be made from mammoth tusk were measured AMS ^<14>C dating. About 1 mg of powdered sample and about 0.75 mg of demineralized sample were used for δ^<13>C and δ^<15>N measurement using ANCA-MS. The δ^<13>C values for collagen of samples (-21.2 to -20.2‰) indicate a fully dependence on C3 plants. About 7 mg of powdered sample was combusted to CO_2 and converted to graphite. The carbon isotope ratios (^<14>C/^<12>C and ^<13>C/^<12>C) were measured with an accelerator mass spectrometry (AMS) system at Nagoya University. From the measured radio carbon isotope ratios, ^<14>C ages of the mammoth ivory were calculated as 36,980±240 yr BP and 38,360±250 yr BP, with 1σ errors, and ^<14>C age of ivory appeared to be mammoth tusk were calculated as 27,010±110 yr BP and 13,155±50 yr BP, with 1σ errors, respectively. These ^<14>C ages were all belonged of the Pleistocene, consequently these objects was determined to be made from mammoth tasks., 第19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告<第2部> Proceedings of the 19th symposiumon on Chronological Studies at the Nagoya University Center for Chronological Research in 2006 日時:平成19 (2007)年1月15日(月)～17日(水) 会場:名古屋大学シンポジオン Date:January15th-17th, 2007 Venue:Nagoya Uhiversity Symposion Hall},
 pages = {211--218},
 title = {AMS^<14>C年代測定による象牙検体の鑑別 (タンデトロン加速器質量分析計業績報告2006(平成18)年度)},
 volume = {18},
 year = {2007}
}