The Mass Spectrometry society of Japan - The 68th Annual Conference on Mass Spectrometry, Japan
Japanese

Abstract

Table of contents

Timetable

Plenary Lectures

Oral Sessions (Day1, Day2, Day3)

Poster Presentations (Day1, Day2, Day3)

Workshops

Luncheon Seminars (Day1, Day2, Day3)

Oral Sessions

Day 1, May 11（Mon.）　16:30-16:50　Room B (1202)

1B-O2-1630　　PDF

Distribution of the 10Be concentration in seawater using by the AMS system.

(1Univ. Tokyo, 2Nihon Univ.)
oTakeyasu Yamagata1,2, Hiroyuki Matsuzaki1, Hisao Nagai2

Cosmogenic nuclide Be-10 (half-life 1.36 Ma) is produced by nuclear interaction between secondary cosmic ray and atmospheric nitrogen and oxygen. Because of Be-10 widely spread in the ocean and the residence time is shorter than ocean-mixing time, the Be-10 concentrations in seawater could be a useful tracer for the ocean circulation. It is necessary accumulation of oceanic Be-10 to assess Be-10 as a tracer for mass transport. In this presentation, the transection of Be-10 concentration shows in the Indian Ocean and the Southeast Pacific during R/V Hakuho-maru in the KH09-5 and KH03-1 cruise, respectively, and discuss a migration of Be-10.