Distribution of plutonium isotopes in sediments of Melanesian Basin, Central Pacific

Wei Dong; Jian Zheng; Masatoshi Yamada; Qiuju Guo

doi:10.1007/s10967-010-0884-y

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 287: Issue 3

Distribution of plutonium isotopes in sediments of Melanesian Basin, Central Pacific

Authors:

Wei Dong

Wei Dong

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Jian Zheng

Jian Zheng Environmental Radiation Effects Research Group, National Institute of Radiological Sciences, Anagawa 491, Inage, Chiba, 263-8555 Japan

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Masatoshi Yamada

Masatoshi Yamada Environmental Radiation Effects Research Group, National Institute of Radiological Sciences, Anagawa 491, Inage, Chiba, 263-8555 Japan

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Qiuju Guo

Qiuju Guo Department of Technical Physics, School of Physics, Peking University, Beijing, 100871 China

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Pages:: 943–948

Online Publication Date:: 25 Oct 2010

Publication Date:: 01 Mar 2011

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-010-0884-y

Keywords:: Plutonium; Global fallout; Close-in fallout; Sediments; 239+240Pu activity concentrations; 240Pu/239Pu atom ratios; Pu inventory; Melanesian Basin; Central Pacific

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Abstract

The anthropogenic plutonium isotopes are important geochemical tracers for environmental studies. The distributions and sources of the Pu isotopes in water column or sediments of the North Pacific have been intensively studied. However, knowledge on the distribution of Pu isotopes in sediments of the Central Pacific, when available, is limited. To study the composition of Pu isotopes in the ocean, thus to identify the sources of radioactive pollution, sediment core samples were collected in the Central Pacific by R/V Hakuho Maru in the KH-04-5 cruise. The activity concentrations of ^239+240Pu and the ²⁴⁰Pu/²³⁹Pu atom ratio were determined using a sector-field inductively coupled mass spectrometry (SF-ICP-MS) combined with a high efficiency sample introduction system (APEX-Q). Possible sources and sedimentation behavior of Pu isotopes are discussed.

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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)