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

doi:10.1007/s10967-007-0535-0

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

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	397-401
Number of pages	5
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	272
Issue number	2
DOIs	https://doi.org/10.1007/s10967-007-0535-0
Publication status	Published - 2007 May 1
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry
Nuclear Energy and Engineering
Radiology Nuclear Medicine and imaging
Pollution
Spectroscopy
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

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An attempt for determining ²³⁵U/²³⁸U ratio for a trace amount of uranium : Search for an extinct radionuclide ²⁴⁷Cm in the early solar system. / Chai, J. Y.; Miyamoto, Y.; Kokubu, Y.; Magara, M.; Sakurai, S.; Usuda, S.; Oura, Y.; Ebihara, M.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 272, No. 2, 01.05.2007, p. 397-401.

Research output: Contribution to journal › Article › peer-review

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