Determination of Absorbed and Annual Effective Doses around Birnin Gwari Artisanal Goldmine, Kaduna State, Nigeria

Y. I. Zakari ； R. Nasiru ； M. A. Abdullahi

《Research Journal of Environmental and Earth Sciences》 5卷5期 (2013/05) Pp. 252-255

並列摘要

This study presents result of outdoor absorbed dose rate and estimated annual effective dose rate from the naturally occurring radionuclides ^(238)U, ^(232)Th and ^(40)K around BirninGwari artisanal goldmine using Instrumental Neutron Activation Analysis (INAA). The results showed that the mean absorbed dose rate is 96.52 nGy/h with a standard deviation of 33.3 nGy/h and the standard error of 9.62 nGy/h the range falls between 26.67-123.85 nGy/h. The mean effective dose rate was estimated to be 0.675 mSv/year with a standard deviation of 0.234 mSv and standard error of 0.068 mSv and in range between 0.183-0.867 mSv. The mean annual effective dose rate from this work is lower than the 1mSv/year recommended by ICRP for public radiation exposure control.

並列關鍵字

Absorbed dose rate ； effective dose rate ； neutron activation analysis ； radionuclides