著者
辻村 憲雄
出版者
日本保健物理学会
雑誌
保健物理 (ISSN:03676110)
巻号頁・発行日
vol.54, no.1, pp.40-44, 2019-04-18 (Released:2019-09-03)
参考文献数
21

Rainwater containing radioactive materials originating from the USA’s nuclear weapon test conducted at Bikini Atoll was observed throughout Japan in 1954. It has been reported that the maximum gross beta activity observed at that time in Kyoto was 523 pCi/mL (19,000 Bq/L). This measurement, however, focused on the gross beta activity contained in a small amount of rain sampled at the beginning of rainfall, which is different from present observations that are based on the average gross beta activity contained in rain collected during a 24-h period. As a result of reviewing and converting the 1954 data to be equivalent to current measurement, the maximum value was reduced to 50 pCi/mL (1,800 Bq/L), with a resultant surface deposition density of 310 mCi/km2 (11,000 MBq/km2). These values are well below 1/10 of the past maximum observed a few days after China’s fifth nuclear weapon test in 1966.

言及状況

外部データベース (DOI)

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@RIKEN_CPR 同じ著者で On the Artificial Radioactivity in Rain Water Observed in Tokyo from April to December 1954 というタイト… https://t.co/CbZ8csYRDN
拙稿「1954年に日本各地で観測された雨水中全β放射能の再検討」(保健物理,54巻1号40~44頁)がJ-STAGEで公開。https://t.co/neLfiQoMjr その補足解説風小話「全β放射能測定法と核実験フォールアウト… https://t.co/4m3qV9jPj4
J-STAGE Articles - Review on the Gross Beta Activity in Rainwater Observed throughout Japan in 1954 https://t.co/TRZBeGx1AZ
拙著「1954年に日本各地で観測された雨水中全β放射能の再検討」(保健物理,54巻1号40~44頁)がJ-STAGEで公開。https://t.co/neLfiQoMjr

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