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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

水素還元法によるAMS法炭素-14測定のためのグラファイトターゲットの作成法

https://doi.org/10.18999/sumrua.2.113
https://doi.org/10.18999/sumrua.2.113
ef7e3509-499f-40c7-95df-a1f5f84b7235
名前 / ファイル ライセンス アクション
KJ00000187509.pdf KJ00000187509.pdf (462.3 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 水素還元法によるAMS法炭素-14測定のためのグラファイトターゲットの作成法
その他のタイトル
その他のタイトル A preparation method of graphite target by reduction of CO_2 with H_2 for AMS <14>^C measurement
著者 北川, 浩之

× 北川, 浩之

WEKO 79464

北川, 浩之

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Kitagawa, Hiroyuki

× Kitagawa, Hiroyuki

WEKO 79465

Kitagawa, Hiroyuki

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増澤, 敏行

× 増澤, 敏行

WEKO 79466

増澤, 敏行

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Masuzawa, Toshiyuki

× Masuzawa, Toshiyuki

WEKO 79467

Masuzawa, Toshiyuki

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松本, 英二

× 松本, 英二

WEKO 79468

松本, 英二

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Matsumoto, Eiji

× Matsumoto, Eiji

WEKO 79469

Matsumoto, Eiji

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山口, 和典

× 山口, 和典

WEKO 79470

山口, 和典

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Yamaguchi, Kazunori

× Yamaguchi, Kazunori

WEKO 79471

Yamaguchi, Kazunori

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中村, 俊夫

× 中村, 俊夫

WEKO 79472

中村, 俊夫

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Nakamura, Toshio

× Nakamura, Toshio

WEKO 79473

Nakamura, Toshio

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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 Carbon-14 has been used extensively as a tracer in environmental science and a dating method for geological and archaeological samples. The recent developement in ^<14>C measurements by accelerator mass spectrome-tory (AMS) has been reduced amounts of carbon and its application has been expanded largely to many new fields. However, several difficulties have been remained in dealing with small amounts of carbon. We have improved the H_2 reduction method with iron powder (Vorgel, et al., 1984,1987) and developed a simple and reliable method of graphite target preparation applicable to samples of sub-milligram carbon. The targets have intense and long-lived ion beams and extremely low ^<14>C background and have allowed us to achieve : (1) For samples in the range of 0.2-3mg carbon, ^<14>C background of targets from coal is 0.11% modern on average (equivalent age 55kyr) and do not vary with the amount of carbon. (2) The isotopic fractionation during the preparation is within 3〓. (3) The beam intensity of produced targets is typically 75% of that of natural graphite. The required time to accumulate 10,000 counts of ^<14>C for a modern sample is 10-15 minutes. (4) Some samples for duration tests of beam currents yield stable currents that decrease gradually and extreamly stable isotope ratio (^<14>C/^<13>C). The AMS ^<14>C measurements for milligram to sub-milligram carbon are made possible with high accuracies.
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.2.113
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/110000475778/
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. 113-122, 発行日 1991-03
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