鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
論文
加速器質量分析による日本刀の14C年代と暦年代
永田 和宏松原 章浩國分(齋藤) 陽子中村 俊夫
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2016 年 102 巻 12 号 p. 736-741

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Steel of Japanese swords has been produced with Tatara process from iron sand and charcoal. Carbon dissolved in steel was absorbed from wooden charcoal fuel during the production of the steel. From the decay of 14C activity in the steel, the 14C age of Japanese sword can be determined. The 14C ages of 4 Japanese swords were measured with accelerator mass spectrometry and calibrated to calendar years. Each 14C age provided plural calendar year periods with definite probabilities, and one of the periods agreed with the production year of each sword that was determined from the sword master’s name cut in the grip of his sword after taking the age range of charcoal used for steel production and usage for several generations of the same names of sword masters into account.

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