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Home  >  Volume 32 (Nov. 2015)

Assessment of Absorbed Radiation Dose Rate in Air in Two Local Government Areas of Delta State, Southern Nigeria by Francis A. Dawodu (pages 351-356)
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Abstract

Assessment of absorbed radiation dose rate in two Local Government Areas of Delta State was conducted between October 2014 and May 2015 in Oshimili North and South. The radiation doses in air for each town in both Local Government Areas was carried out by placing the Gieger Mueller counter and stop watch in five locations and taking the mean. The annual effective dose rate in µSv year-1was calculated for each town. The study found that the highest mean absorbed dose rate of 113 nGyh-1 was obtained in Anwai in Oshimili south Local Government Area, while the least absorbed dose rate was obtained in okwe also in Oshimili South Local Government Area. The highest mean absorbed dose rate recorded in Anwai might be due the presence of granite rocks and nearness to River Niger, where there could be some deposits of toxic materials. The results also show that the absorbed radiation in ten of the eleven locations is smaller than the world average.

 

 

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