Seasonal variations of 228Ra/226Ra and 228Th/228Ra ratios in surface water from the eastern East China Sea

A total of 30 surface water samples were collected at 2 sites on the east side of the East China Sea (ECS) during 2008–20f0, and 226Ra, 228Ra, and 228Th activities were measured using low-background γ-spectrometry. The 228Ra/226Ra and 228Th/228Ra activity ratios of the samples exhibited notable seas...

Full description

Saved in:
Bibliographic Details
Published inEPJ Web of conferences Vol. 24; pp. 04005 - 4011
Main Authors Yoshida, K., Inoue, M., Kiyomoto, Y., Minakawa, M., Kofuji, H., Nagao, S., Hamajima, Y., Yamamoto, M.
Format Journal Article
LanguageEnglish
Published EDP Sciences 01.04.2012
Online AccessGet full text

Cover

More Information
Summary:A total of 30 surface water samples were collected at 2 sites on the east side of the East China Sea (ECS) during 2008–20f0, and 226Ra, 228Ra, and 228Th activities were measured using low-background γ-spectrometry. The 228Ra/226Ra and 228Th/228Ra activity ratios of the samples exhibited notable seasonal variations (228Ra/226Ra = 0.2–3.3; 228Th/228Ra = < 0.1–0.4) accompanying salinity changes (31.0–34.6). These changes are hypothesized to cause the change by altering the mixing ratio of 228Ra-rich and particle-rich continental shelf water within the ECS.
Bibliography:other:2012EPJWC..2404005Y
istex:DFBD88B206FF0A002E672A2422C59513C4969B5E
publisher-ID:epjconf_er2010_04005
ark:/67375/80W-609T4862-5
ISBN:9788874380695
8874380690
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20122404005