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The spectrometer has been used to measure ^\u003c14\u003eC concentrations of natural samples, as well as ^\u003c14\u003eC ages of geological and archeological samples. The Tandetron spectrometer measures ^\u003c14\u003eC/^\u003c13\u003eC ratios of carbon prepared from carbonaceous samples. The ratio of a young samples (^\u003c14\u003eC ages younger than several thousand years old) is routinely measured with a precision of ±1%, using a C-Ag mixture target containing only 2-5 mg of carbon, in a measurement lasting about 4 hours. Errors for older samples become larger, because of the smaller number of ^\u003c14\u003eC counts. The ^\u003c14\u003eC background level of the spectrometer, estimated by using old natural graphite, it about 3x10^\u003c-16\u003e in ^\u003c14\u003eC/^\u003c12\u003eC ratio. 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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. 2

名古屋大学東山キャンパス内の松葉の<14>^C濃度測定

https://doi.org/10.18999/sumrua.2.104
https://doi.org/10.18999/sumrua.2.104
160acc51-3488-467f-a059-217aafbbefd6
名前 / ファイル ライセンス アクション
KJ00000187507.pdf KJ00000187507.pdf (414.1 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2010-04-26
タイトル
タイトル 名古屋大学東山キャンパス内の松葉の<14>^C濃度測定
その他のタイトル
その他のタイトル <14>^C concentrations by accelerator mass spectrometry of pine needles collected at Higashiyama campus of Nagoya University
著者 中村, 俊夫

× 中村, 俊夫

WEKO 79458

中村, 俊夫

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Nakamura, Toshio

× Nakamura, Toshio

WEKO 79459

Nakamura, Toshio

Search repository
中井, 信之

× 中井, 信之

WEKO 79460

中井, 信之

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Nakai, Nobuyuki

× Nakai, Nobuyuki

WEKO 79461

Nakai, Nobuyuki

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古川, 路明

× 古川, 路明

WEKO 79462

古川, 路明

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Furukawa, Michiaki

× Furukawa, Michiaki

WEKO 79463

Furukawa, Michiaki

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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 A Tandetron accelerator mass spectrometer, constructed by the General Ionex Corporation, Mass., USA, has been installed at Nagoya University in 1982,to measure ^<14>C. The spectrometer has been used to measure ^<14>C concentrations of natural samples, as well as ^<14>C ages of geological and archeological samples. The Tandetron spectrometer measures ^<14>C/^<13>C ratios of carbon prepared from carbonaceous samples. The ratio of a young samples (^<14>C ages younger than several thousand years old) is routinely measured with a precision of ±1%, using a C-Ag mixture target containing only 2-5 mg of carbon, in a measurement lasting about 4 hours. Errors for older samples become larger, because of the smaller number of ^<14>C counts. The ^<14>C background level of the spectrometer, estimated by using old natural graphite, it about 3x10^<-16> in ^<14>C/^<12>C ratio. The Tandetron spectrometer has been applied to measure ^<14>C concentrations, Δ^<14>C, of annual rings (1945-1983) from a Kiso hinoki tree (Japanese Cypress), to investigate the annual Δ^<14>C variation of the atmospheric CO_2 ; the cause of variation could be addition of ^<14>C produced by nuclear weapon tests in late 1950's to early 1960's. The ^<14>C concentrations in pine needles, collected at the Higashiyama Campus of Nagoya University, have also been measured since 1983. The results in our ^<14>C measurement of pine needles are described in the present study, focusing on the annual changes in Δ<14>C values of the atmoshperic CO_2,and on the effect upon ^<14>C concentrations for pine needles of a local ^<14>CO_2 emission from incineration of radioactive organic solvent wastes containing ^<14>C, which have been produced by biochemical experiments with ^<14>C tracer, at the Radioisotope Center in the Higashiyama Campus of Nagoya University.
内容記述タイプ Abstract
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.2.104
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://ci.nii.ac.jp/naid/110000475776/
書誌情報 名古屋大学加速器質量分析計業績報告書

巻 2, p. 104-112, 発行日 1991-03
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