Radiochemical neutron activation analysis of Mo and W in geochemical and cosmochemical samples with an emphasis on the correction of fission products

Y. Oura; T. Motohashi; M. Ebihara

doi:10.1007/s10967-007-0208-z

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 271: Issue 2

Radiochemical neutron activation analysis of Mo and W in geochemical and cosmochemical samples with an emphasis on the correction of fission products

Authors:

Y. Oura

Y. Oura Tokyo Metropolitan University Department of Chemistry, Graduate School of Science 1-1 Minami-Ohsawa Hachioji, Tokyo 192-0397 Japan

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T. Motohashi

T. Motohashi Tokyo Metropolitan University Department of Chemistry, Graduate School of Science 1-1 Minami-Ohsawa Hachioji, Tokyo 192-0397 Japan

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, and

M. Ebihara

M. Ebihara Tokyo Metropolitan University Department of Chemistry, Graduate School of Science 1-1 Minami-Ohsawa Hachioji, Tokyo 192-0397 Japan

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Pages:: 305–309

Online Publication Date:: 06 Dec 2006

Publication Date:: 01 Feb 2007

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-007-0208-z

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Abstract

Radiochemical neutron activation analysis (RNAA) was applied to geochemical and cosmochemical samples to determine trace amounts of Mo and W. To determine the Mo concentration by NAA accurately, the contribution of the fission products of U should be corrected. For that reason, we developed a simple and effective method, where a contribution of fissiogenic ⁹⁹Mo was estimated by monitoring the ratio of uranium fission-product ⁹⁹Mo to ¹³³I. Mo concentrations corrected for fission with the W concentrations were consistent with the literature values, showing that ¹³³I was found to be an effective monitor for fission correction. Detection limits are estimated to be 10 ppb for Mo and W and 30 ppb for U under the present experimental conditions.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)