車を利用した北海道における環境γ線測定 A Car-Borne Survey of Environmental Gamma Rays in Hokkaido, Japan

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An extensive car-borne survey was made for the evaluation of dose rates due to environmental gamma rays in Hokkaido during the period from May 1994 to January 1996. The dose-rate levels in Hokkaido were estimated from survey results measured with a portable pure germanium spectrometer installed in a car. The car speed was kept between 30 and 60km h<sup>-1</sup> (car-borne measurements). In addition to the car-borne measurements, another mode of measurement (spot measurements) was also made at 100 specific places selected in advance. The measurement times were set at 900s real time both for car-borne measurements and spot measurements. The survey routes covered almost all districts along the main roads in Hokkaido. From the car-borne measurements, absorbed dose rates in air due to gamma rays were found to be distributed from 14.9 to 116.5nGy h<sup>-1</sup>. The arithmetic mean dose rate and the standard deviation were calculated to be 42.1±16.2nGy h<sup>-1</sup>. The variation of total absorbed dose rate was found to be originated mainly by the variation of contribution from the Th-232 series nuclides.

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  • 保健物理 : hoken buturi  

    保健物理 : hoken buturi 32(3), 295-304, 1997-09-30 

    Japan Health Physics Society

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各種コード

  • NII論文ID(NAID)
    10002136607
  • NII書誌ID(NCID)
    AN00228458
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03676110
  • NDL 記事登録ID
    4313991
  • NDL 雑誌分類
    ZN36(科学技術--原子力工学・工業) // ZS45(科学技術--医学--放射線医学)
  • NDL 請求記号
    Z16-696
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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