南大洋海水中の¹³⁷Cs, プルトニウムおよびアメリシウム同位体含有量

• 三宅 泰雄

  地球化学研究協会

• 猿橋 勝子

  地球化学研究協会

• 杉村 行勇

  気象研究所

• 金沢 照子

  気象研究所

• 広瀬 勝己

  気象研究所

書誌事項

タイトル別名

• Contents of 137Cs, plutonium and americium isotopes in the Southern Ocean waters.
• Contents of 137Cs, plutonium and americium isotopes in Southern Ocean waters

抄録

   The effect on the Pacific and Indian Oceans of the radioactive fallout have been systematically studied by the present authors for many years. In this study, the content and distribution of ¹³⁷Cs, plutonium isotopes (²³⁸Pu, ²³⁹Pu, ²⁴⁰Pu and ²⁴¹Pu) and americium (²⁴¹Am) which is a decay product of ²⁴¹Pu on the Southern Ocean surface are reported.<br>   Water samples were collected south of Australia and New Zealand in 1977-1978. Above radioactive nuclides were precipitated from a large amount of sea water on board and brought back to the land laboratory. ¹³⁷Cs was coprecipitated with ammonium phosphomolybdate. Plutonium and americium were coprecipitated with magnesium hydroxide. The determination of ¹³⁷Cs was done by gamma-spectrometry. For plutonium and americium, alpha-spectrometry was used after the separation of these nuclides from a bulk of magnesium hydroxide precipitate by using ion exchange resin method.<br>   The result of determination showed that content of ¹³⁷Cs ranged from 0.02 to 0.15pCil^-1, ^239+240Pu from 0.2 to 2.5×10^-4pCil^-1, ²⁴¹Am from 0.2 to 0.5×10^-4pCil^-1. The ratio of ²³⁸Pu to ^239+240Pu was 20 to 160%. The comparison between these results and those previously obtained in the Pacific and Indian Oceans will be done.

収録刊行物

• 気象研究所研究報告

  気象研究所研究報告 39 (3), 95-113, 1988

  気象庁気象研究所

キーワード

• Atmospheric Science
• Geophysics

詳細情報

• CRID: 1390001206459353344
• NII論文ID: 130004484841
• NII論文ID: 80004220065
• DOI: 10.2467/mripapers.39.95
• ISSN: 18806643
• ISSN: 0031126X
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可