Uranium in coral skeletons determined by epithermal neutron activation analysis.
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| Title: | Uranium in coral skeletons determined by epithermal neutron activation analysis. |
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| Authors: | Ohde, S.1 sohde@sci.u-ryukyu.ac.jp, Hossain, M. M. M.1, Ozaki, H.2, Masuzawa, T.3 |
| Source: | Journal of Radioanalytical & Nuclear Chemistry. Oct2003, Vol. 258 Issue 2, p275-280. 6p. |
| Subjects: | Uranium, Actinide elements, Transuranium elements, Zoantharia, Fossil corals, Fossil anthozoa |
| Abstract: | A simple and non-destructive method has been proposed for the routine determination of uranium by epithermal neutron activation analysis in coral skeletons. Using a cadmium capsule, about 0.1-0.2 g samples were irradiated for 6 hours in the Triga Mark II Reactor. Measurements of γ-ray (239Np via 239U) were performed with each sample and standard after cooling for about three days. Compared with a non-destructive thermal NAA, the present method was found to improve the sensitivity because it reduced the intense Compton background induced by 24Na. We determined uranium in coral standards within 2% of analytical precision. The data obtained for the carbonate standards are mostly consistent with reported values. The present method could be usefully applied to determine uranium contents in fossil corals from the Funafuti Atoll in the Pacific. The distribution of uranium between seawater and coral skeletons is also discussed in order to understand the environmental media in which the coral grew. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Radioanalytical & Nuclear Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 16782179 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Uranium in coral skeletons determined by epithermal neutron activation analysis. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ohde%2C+S%2E%22">Ohde, S.</searchLink><relatesTo>1</relatesTo><i> sohde@sci.u-ryukyu.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Hossain%2C+M%2E+M%2E+M%2E%22">Hossain, M. M. M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ozaki%2C+H%2E%22">Ozaki, H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Masuzawa%2C+T%2E%22">Masuzawa, T.</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Radioanalytical+%26+Nuclear+Chemistry%22">Journal of Radioanalytical & Nuclear Chemistry</searchLink>. Oct2003, Vol. 258 Issue 2, p275-280. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Uranium%22">Uranium</searchLink><br /><searchLink fieldCode="DE" term="%22Actinide+elements%22">Actinide elements</searchLink><br /><searchLink fieldCode="DE" term="%22Transuranium+elements%22">Transuranium elements</searchLink><br /><searchLink fieldCode="DE" term="%22Zoantharia%22">Zoantharia</searchLink><br /><searchLink fieldCode="DE" term="%22Fossil+corals%22">Fossil corals</searchLink><br /><searchLink fieldCode="DE" term="%22Fossil+anthozoa%22">Fossil anthozoa</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A simple and non-destructive method has been proposed for the routine determination of uranium by epithermal neutron activation analysis in coral skeletons. Using a cadmium capsule, about 0.1-0.2 g samples were irradiated for 6 hours in the Triga Mark II Reactor. Measurements of γ-ray (239Np via 239U) were performed with each sample and standard after cooling for about three days. Compared with a non-destructive thermal NAA, the present method was found to improve the sensitivity because it reduced the intense Compton background induced by 24Na. We determined uranium in coral standards within 2% of analytical precision. The data obtained for the carbonate standards are mostly consistent with reported values. The present method could be usefully applied to determine uranium contents in fossil corals from the Funafuti Atoll in the Pacific. The distribution of uranium between seawater and coral skeletons is also discussed in order to understand the environmental media in which the coral grew. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Radioanalytical & Nuclear Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1023/A:1026229603318 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 275 Subjects: – SubjectFull: Uranium Type: general – SubjectFull: Actinide elements Type: general – SubjectFull: Transuranium elements Type: general – SubjectFull: Zoantharia Type: general – SubjectFull: Fossil corals Type: general – SubjectFull: Fossil anthozoa Type: general Titles: – TitleFull: Uranium in coral skeletons determined by epithermal neutron activation analysis. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ohde, S. – PersonEntity: Name: NameFull: Hossain, M. M. M. – PersonEntity: Name: NameFull: Ozaki, H. – PersonEntity: Name: NameFull: Masuzawa, T. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2003 Type: published Y: 2003 Identifiers: – Type: issn-print Value: 02365731 Numbering: – Type: volume Value: 258 – Type: issue Value: 2 Titles: – TitleFull: Journal of Radioanalytical & Nuclear Chemistry Type: main |
| ResultId | 1 |
