Radioactive Contamination by the Accident of the Fukushima Daiichi Nuclear Power Plant, and the Transition of the Radioactive Concentration—Measurement of the Tea Leaf etc. of Bunkyo-ku Hongo and Tokorozawa—

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  • HOSONO Yoneichi
    Department of Systems Innovation, School of Engineering, The University of Tokyo
  • TAKAHASHI Hiroyuki
    Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo

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Other Title
  • 福島第一原子力発電所の事故による放射能汚染とその放射能濃度の経時変化―文京区本郷と所沢市の茶葉等の測定―
  • フクシマ ダイイチ ゲンシリョク ハツデンショ ノ ジコ ニ ヨル ホウシャノウ オセン ト ソノ ホウシャノウ ノウド ノ ケイジ ヘンカ : ブンキョウク ホンゴウ ト トコロザワシ ノ チャバ トウ ノ ソクテイ

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Abstract

In the case of the metropolitan area, radioactive substances came flying from March 15 to 16 and from March 20 to 23. We measured the radioactive substance contained in leaves using a HPGermanium semiconductor detector.<br>As a result of the measurement, we confirmed the following. (a)The main radioactive substance are 132Te, 131I, 134Cs, and 137Cs. (b)The 134Cs and the 137Cs were almost same quantity. (c)Radioactive concentration such as tea leaf etc. has decreased by the physical half life and the weather condition etc.

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 62 (1), 19-23, 2013

    Japan Radioisotope Association

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