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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 11

加速器質量分析法による古文書および古経典の<14>^C年代測定

https://doi.org/10.18999/sumrua.11.123
08c626f1-0f56-438b-8382-f38100b006eb
名前 / ファイル ライセンス アクション
KJ00000187342.pdf KJ00000187342.pdf (1.6 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2010-05-27
タイトル
タイトル 加速器質量分析法による古文書および古経典の<14>^C年代測定
その他のタイトル
その他のタイトル AMS radiocarbon dating of ancient Japanese documents and sutras
著者 小田, 寛貴

× 小田, 寛貴

WEKO 80993

小田, 寛貴

Search repository
Oda, Hirotaka

× Oda, Hirotaka

WEKO 80994

Oda, Hirotaka

Search repository
増田, 孝

× 増田, 孝

WEKO 80995

増田, 孝

Search repository
Masuda, Takashi

× Masuda, Takashi

WEKO 80996

Masuda, Takashi

Search repository
吉沢, 康和

× 吉沢, 康和

WEKO 80997

吉沢, 康和

Search repository
Yoshizawa, Yasukazu

× Yoshizawa, Yasukazu

WEKO 80998

Yoshizawa, Yasukazu

Search repository
藤田, 恵子

× 藤田, 恵子

WEKO 80999

藤田, 恵子

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Fujita, Keiko

× Fujita, Keiko

WEKO 81000

Fujita, Keiko

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中村, 俊夫

× 中村, 俊夫

WEKO 81001

中村, 俊夫

Search repository
Nakamura, Toshio

× Nakamura, Toshio

WEKO 81002

Nakamura, Toshio

Search repository
古川, 路明

× 古川, 路明

WEKO 81003

古川, 路明

Search repository
Furukawa, Michiaki

× Furukawa, Michiaki

WEKO 81004

Furukawa, Michiaki

Search repository
権利
権利情報 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会
権利
権利情報 本文データは学協会の許諾に基づきCiNiiから複製したものである
抄録
内容記述 History is a reconstruction of past human activity, evidence of which is remained in the form of documents or relics. The radiocarbon dating of ancient document and sutra provides important information for the reconstruction of historic period. But radiocarbon age as another expression of ^<14>C concentration in the sample is different from the historical age when the document was written. The difference between radiocarbon age and historical age becomes more serious problem for recent sample which requires more accurate age determination. There is discrepancy between radiocarbon age and calendar age owing to variability of ^<14>C concentration in the atmosphere. Although radiocarbon age is converted into calender age with the calibration curve, the calibrated radiocarbon age is still different from the historical age. It is known as "old wood effect" for wooden cultural property that the calibrated radiocarbon age is older than the historical age when it was produced as a tool. The purpose of this study is to clarify the relation between calibrated radiocarbon age and historical age of ancient Japanese document by AMS radiocarbon dating of Japanese ancient documents and sutras written dates of which are clarified from the paleographic standpoint. We measured radiocarbon ages of 15 sutras and 7 documents written dates of which are known. Alpha-cellulose was extracted from each paper sample by chemical treatment. The cellulose was burnt to CO_2 at 850℃ with CuO. We prepared graphite targets for AMS measurements, reducing CO_2 with H_2 and Fe catalyst at 650℃ in sealed glass tube. We measured radiocarbon ages of the graphite samples with the Tandetron accelerator mass spectrometer at Nagoya University. The isotopic fractionation is corrected by δ ^<13>C values measured with the Finnigan MAT-252 mass spectrometer. The calibrated radiocarbon ages of samples taken from the obverse-side sheets on which Chinese characters were written with Indian ink are in good agreement with the corresponding historical ages. Japanese paper had been made mainly from bast fiber of deciduous trees : Kozo, Ganpi and Mitsumata. Because the fiber of old branches is unsuitable for paper manufacture and yields paper of poor quality, fresh branches grown within a few years were harvested selectivity. In addition, for Kozo paper, the interval from trimming off branches to writing document on manufactured paper is usually within one year, because paper changes in quality by preservation and becomes unsuitable to write with Indian ink. The good agreement between calibrated radiocarbon age and historical age is supposed by such characteristics of Japanese paper. The calibrated radiocarbon age of a paper sample stuck on the back side of a sutra for reinforcement is much younger than the historical age of the sutra. Although the calibrated radiocarbon age could indicate the age when the sutra was repaired, it leaves room for further investigation. It is likely that older paper was used for repairing, since fresh paper would make creased on the original paper. Radiocarbon age of another reinforcing paper was older than that of obverse-side sheet. Therefore, calibrated radiocarbon age of reinforcing paper has no distinct relevance to the historical age. It was shown in this study that the radiocarbon age of the obverse-side paper of document which was used for writing characters and transmitting some information has little gap by "old wood effect" ; accordingly, such paper of ancient Japanese document or sutra is a suitable sample for radiocarbon dating of recent historic period. Japanese paper used for reinforcement has no clear relationship between the calibrated radiocarbon age and the historical age when the sutra was written. The radiocarbon dating of such kind of paper would, however, provide us information about recycling or repair of ancient document.
内容記述タイプ Abstract
内容記述
内容記述 タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 1999 (平成11)年度
内容記述タイプ Other
出版者
出版者 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.18999/sumrua.11.123
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
関連識別子
識別子タイプ URI
関連識別子 http://ci.nii.ac.jp/naid/110000475634/
書誌情報 名古屋大学加速器質量分析計業績報告書

巻 11, p. 123-145, 発行日 2000-03
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