Pu Isotopes, 241Am and 137Cs in Soils from the Atomic Bombed Areas in Nagasaki and Hiroshima

フォーマット:

論文

責任表示:

Yamamoto, Masayoshi ; Komura, Kazuhisa ; Sakanoue, Masanobu ; Hoshi, Masaharu ; Sawada, Shozo ; Okajima, Shunzo ; 山本, 政儀 ; 小村, 和久 ; 阪上, 正信 ; 星, 正治 ; 澤田, 昭三 ; 岡島, 俊三

言語:

英語

出版情報:

日本放射線影響学会, Journal of Radiation Research 編集委員会, 1985

著者名:

Yamamoto, Masayoshi

Komura, Kazuhisa

Sakanoue, Masanobu

Hoshi, Masaharu

Sawada, Shozo

Okajima, Shunzo

山本, 政儀

小村, 和久

阪上, 正信

星, 正治

澤田, 昭三

岡島, 俊三

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掲載情報:

Journal of Radiation Research

ISSN:

0449-3060      
1349-9157      

巻:

26

通号:

2

開始ページ:

211

終了ページ:

223

バージョン:

publisher

概要:

金沢大学環日本海域環境研究センター<br />Plutonium Isotopes, 241Am and 137Cs in soil samples collected from Nagasaki and Hiroshima were measured to evaluate the contribution of residual radioactivity derived from the atomic bombs dropped in 1945.In the … soils from Nishiyama area of Nagasaki City, activity ratios different from those of global fallout were found for the 238Pu/239, 240Pu (0.05-0.06), 239, 240Pu/137Cs (0.2-0.3), 241Am/239, 240Pu (0.04-0.05) and 240Pu/239Pu (0.08-0.13), activity ratios indicating that a fair amount of plutonium derived from the atomic bomb had accumulated in this area. On the other hand, in the soils from the “Black-rain” area of Hiroshima, no significant difference from the global fallout was found for the activity ratios among the Pu isotopes, 241Am and 137Cs except for the soils collected at 10 km and 12 km in the NNW direction from the epicenter, where a factor 2 to 3 lower 241Am/239, 240Pu activity ratio was observed. However, no evidence of the contribution of the atomic bomb was found by the measurement of 240Pu/239Pu isotopic ratio. 続きを見る

URL:

http://hdl.handle.net/2297/00063384