Distribution of Plutonium isotopes in sediments of the South Pacific Ocean
The anthropogenic plutonium isotopes (240Pu, 239Pu) are important chronometers for the determination of recent sediment accumulation rates using sediment cores collected from freshwater lakes and oceans. The distributions and sources of the Pu isotopes of water column or sediments of North Pacific (...
Main Authors: | , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://repo.qst.go.jp/?action=repository_uri&item_id=69804 http://id.nii.ac.jp/1657/00069792/ |
id |
ftnirs:oai:repo.qst.go.jp:00069804 |
---|---|
record_format |
openpolar |
spelling |
ftnirs:oai:repo.qst.go.jp:00069804 2023-05-15T13:45:49+02:00 Distribution of Plutonium isotopes in sediments of the South Pacific Ocean Dong Wei Zheng Jian Yamada Masatoshi Guo Qiuju 2019-02-21 https://repo.qst.go.jp/?action=repository_uri&item_id=69804 http://id.nii.ac.jp/1657/00069792/ en eng https://repo.qst.go.jp/?action=repository_uri&item_id=69804 http://id.nii.ac.jp/1657/00069792/ 2009-07-17 Presentation 2019 ftnirs 2021-12-30T08:04:26Z The anthropogenic plutonium isotopes (240Pu, 239Pu) are important chronometers for the determination of recent sediment accumulation rates using sediment cores collected from freshwater lakes and oceans. The distributions and sources of the Pu isotopes of water column or sediments of North Pacific (deep sea or coral environment) have been intensively studied. However, knowledge on the distribution of Pu isotopes in sediments of the South Pacific Ocean, 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 from 2004 to 2005 in the South Pacific Ocean, including the Antarctic sea along 1700W by R/V Hakuho Maru in the KH-04-5 cruise. Multiple corers were used for sampling in order to avoid anthropogenic influence or disconcertion. The concentration of 240+239Pu and the atom ratio of 240Pu/239Pu 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 will be discussed in this paper. The Fifth International Symposium on Radiation Safety and Detection Technology (ISORD-5) Conference Object Antarc* Antarctic National Institute of Radiological Science: NIRS-Repository Antarctic The Antarctic Pacific |
institution |
Open Polar |
collection |
National Institute of Radiological Science: NIRS-Repository |
op_collection_id |
ftnirs |
language |
English |
description |
The anthropogenic plutonium isotopes (240Pu, 239Pu) are important chronometers for the determination of recent sediment accumulation rates using sediment cores collected from freshwater lakes and oceans. The distributions and sources of the Pu isotopes of water column or sediments of North Pacific (deep sea or coral environment) have been intensively studied. However, knowledge on the distribution of Pu isotopes in sediments of the South Pacific Ocean, 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 from 2004 to 2005 in the South Pacific Ocean, including the Antarctic sea along 1700W by R/V Hakuho Maru in the KH-04-5 cruise. Multiple corers were used for sampling in order to avoid anthropogenic influence or disconcertion. The concentration of 240+239Pu and the atom ratio of 240Pu/239Pu 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 will be discussed in this paper. The Fifth International Symposium on Radiation Safety and Detection Technology (ISORD-5) |
format |
Conference Object |
author |
Dong Wei Zheng Jian Yamada Masatoshi Guo Qiuju |
spellingShingle |
Dong Wei Zheng Jian Yamada Masatoshi Guo Qiuju Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
author_facet |
Dong Wei Zheng Jian Yamada Masatoshi Guo Qiuju |
author_sort |
Dong Wei |
title |
Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
title_short |
Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
title_full |
Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
title_fullStr |
Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
title_full_unstemmed |
Distribution of Plutonium isotopes in sediments of the South Pacific Ocean |
title_sort |
distribution of plutonium isotopes in sediments of the south pacific ocean |
publishDate |
2019 |
url |
https://repo.qst.go.jp/?action=repository_uri&item_id=69804 http://id.nii.ac.jp/1657/00069792/ |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://repo.qst.go.jp/?action=repository_uri&item_id=69804 http://id.nii.ac.jp/1657/00069792/ 2009-07-17 |
_version_ |
1766231403145461760 |