海水中の極微量人工放射性核種237Npの定量法検討

榊枝 優真; 中島 朗久; 永井 歩夢; 細川 浩由; 横山 明彦; 羽場 宏光; 南部 明弘; 重河 優大; 鄭 建; 瀬古 典明; 保科 宏行; Hain Karin; Andreas Wiederin; 末木 啓介; 山崎 信哉; 坂口 綾

doi:10.14862/geochemproc.70.0_47

Abstracts of Annual Meeting of the Geochemical Society of Japan

DOI https://doi.org/10.14862/geochemproc.70.0_47

Conference information

Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Name : Abstracts of Annual Meeting of the Geochemical Society of Japan

Number : 70

Date : September 14, 2023 - September 24, 2023

Establishment of an analytical method for ultra-trace anthropogenic ²³⁷Np in seawater

Sakakieda Yuma, Nakajima Akihisa, Nagai Ayumu, Hosokawa Hiroyuki, Yokoyama Akihiko, Haba Hiromitsu, Nambu Akihiro, Shigekawa Yudai, Zheng Jian, Seko Noriaki, Hoshina Hiroyuki, Hain Karin, Andreas Wiederin, Sueki Keisuke, Yamasaki Shinya, *Sakaguchi Aya

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Keywords: Np-237, Anthropogenic radionuclides, Oceanic circulation tracer

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 47-

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Abstract

²³⁷Np is recognized as a candidate tracer for the circulation of seawater. However, ²³⁷Np measurements have not been conducted extensively. This is because the concentration of ²³⁷Np in seawater is extremely low, the chemical separation for measurement is complicated, and there is no suitable "spike" for ²³⁷Np measurements. In this study, we propose a comprehensive analysis method for ²³⁷Np in seawater by producing the new spike for ²³⁷Np measurement and by introducing a simple Np concentration method from seawater for application to establish the robust ²³⁷Np seawater circulation tracer.

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