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Journal Articles

Origin and chemical speciation of anthropogenic Iodine-129

Shima, Shigeki*; Gasa, Shinichi*; Amano, Hikaru; Nagao, Seiya*; Yamamoto, Masayoshi*; Momoshima, Noriyuki*; Furukawa, Masahide*; Kimura, Hideki*; Kawamura, Hisao*

JAEA-Conf 2008-003, p.28 - 31, 2008/04

Concentrations of $$^{129}$$I in surface seawater around Japan were approximately 2$$times$$10$$^{7}$$atoms/L in literatures. However, the atomic ratio of iodine to cesium was ten times as high as that of the global fallout. The origin of $$^{129}$$I in the water columns seems to be difficult to be explained by only the global fallout. Discharge from European plants was one of the possible origins of iodine from the standpoint of air mass trajectory analysis. Concentration of $$^{129}$$I in rain water was 10 times higher than that in surface seawater. Anthropogenic inorganic iodine in surface seawater predominantly dissolves as an iodide ion (I$$^{-}$$).

Journal Articles

Determination of $$^{129}$$I in seawater by accelerator mass spectrometry with solvent extraction method

Gasa, Shinichi*; Sawafuji, Natsuko*; Kabuto, Shoji; Kinoshita, Naoki; Amano, Hikaru; Kawamura, Hisao*

Radioisotopes, 56(4), p.155 - 162, 2007/04

no abstracts in English

JAEA Reports

Studies on applications of detectors for marine radioactivity and methodologies for data analysis (Joint Research)

Ito, Toshimichi; Kinoshita, Masataka*; Saito, Saneatsu*; Machiyama, Hideaki*; Shima, Shigeki*; Gasa, Shinichi*; Togawa, Orihiko; Okano, Masaharu*

JAERI-Research 2005-028, 121 Pages, 2005/09

JAERI-Research-2005-028.pdf:12.45MB

no abstracts in English

Oral presentation

Preliminary calculation of influences on the North Pacific by the nuclear testing around the Bikini Atoll using SEA-GEARN

Matsuura, Yasutaka*; Nakayama, Tomoharu*; In, Teiji*; Gasa, Shinichi*; Shima, Shigeki*; Kobayashi, Takuya; Togawa, Orihiko; Ishikawa, Yoichi*; Awaji, Toshiyuki*

no journal, , 

no abstracts in English

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