El Arabi A M, Ahmed N K, Salahel Din K
Physics Department, Faculty of Science, South Valley University, Qena, Egypt.
Radiat Prot Dosimetry. 2008;128(3):382-5. doi: 10.1093/rpd/ncm367. Epub 2007 Jul 12.
External exposures of population to ionising radiation due to naturally occurring radionuclides in sixty-three granite samples from three different locations in south eastern desert of Egypt were considered in this article. Average outdoor gamma dose rates in air were 190, 290 and 330 nGy h(-1) for Elba, Qash Amir and Hamra Dome granites, respectively. The corresponding doses in indoor air are 270, 400 and 470 nGy h(-1), respectively. These average values give rise to annual effective dose (outdoor, indoor and in total) 0.24, 1.4 and 1.6 mSv for Elba granite. For Qash Amir and Hamra Dome granites the corresponding values were 0.35, 2 and 2.3 mSv and 0.41, 2.3 and 2.7 mSv, respectively.
本文研究了埃及东南部沙漠三个不同地点的63个花岗岩样品中天然存在的放射性核素致使人群受到的外部电离辐射。对于埃尔巴、卡什·阿米尔和哈姆拉穹顶花岗岩，空气中室外平均伽马剂量率分别为190、290和330纳戈瑞每小时。室内空气中相应剂量分别为270、400和470纳戈瑞每小时。这些平均值使得埃尔巴花岗岩的年有效剂量（室外、室内及总计）分别为0.24、1.4和1.6毫希沃特。对于卡什·阿米尔和哈姆拉穹顶花岗岩，相应数值分别为0.35、2和2.3毫希沃特以及0.41、2.3和2.7毫希沃特。
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