Natural radioactivity level of associated bone-coal mining area in Zhejiang Province

Abstract： The geographic distribution, γ-radiation level and specific activity of radionuclides of the bone-coal mines in Zhejiang Province were reported. The weighted average of γ-radiation dose rate of the bone-coal mines is 566 nGy/h for 107 main bone-coal mines. The weighted mean activity of 238U, 226Ra, 232Th and 40K in the samples are 949, 918, 34 and 554 Bq/kg for 171 samples of bone-coal, respectively. 作 者：   作者單位：   期 刊： 核技術（英文版）  SCI   Journal： NUCLEAR SCIENCE AND TECHNIQUES  年，卷(期)： 2005, 16(5)  分類號： X591 X837  Keywords： Bone-coal    Natural radioactivity    γ-radiation level    Radionuclides   

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