An attempt for determining 235U/238U ratio for a trace amount of uranium: Search for an extinct radionuclide 247Cm in the early solar system

J. Y. Chai, Y. Miyamoto, Y. Kokubu, M. Magara, S. Sakurai, S. Usuda, Y. Oura, M. Ebihara

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In order to search for isotopic anomalies of U caused by the disintegration of 247Cm in meteorite samples, an analytical scheme for determining 235U/238U ratio for a small amount of uranium (less than 1 ng U) was established. The isotopic ratio of U was determined by double-focusing inductively coupled plasma mass spectrometry (DF-ICP-MS). With a great improvement of chemical procedure for purifying the uranium fraction separated from meteorite samples, a variation in 235U/238U ratios was resolved at an order of ±4‰ for 100 ppt or 200 pg U in solution. For applying the procedure in searching an evidence of 247Cm as an extinct radionuclide in the early solar system, a selective chemical dissolution of constituent minerals of meteorites using EDTA and HCl was introduced and a chemical purification scheme of uranium for ICP-MS was established.

本文言語English
ページ(範囲)397-401
ページ数5
ジャーナルJournal of Radioanalytical and Nuclear Chemistry
272
2
DOI
出版ステータスPublished - 2007 5
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 原子力エネルギーおよび原子力工学
  • 放射線学、核医学およびイメージング
  • 汚染
  • 分光学
  • 公衆衛生学、環境および労働衛生
  • 健康、毒物学および変異誘発

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