Paper Key : IRJ************290
Author: Obajemu Gilbert Olatunji Ph.d..
Date Published: 09 Apr 2024
Abstract
Generally, soil contains some natural radionuclide that emit radiation to the environment which eventually will cause a lot of health effect and excess radiological burden to human being at high concentration above the screening level. In this studies, the activities concentrations of naturally occurring radionuclide 226Ra, 232Th and 40k were determined in soil samples from College of Education Technical, Kabba, Kogi State using a well calibrated and shielded Canberra 3 x 3 inch NaI(Tl) detector at the Department of Pure physics, Ladoke Akintola University of Technology, Ogbomosho. The results shows that samples from the study area have activity concentrations ranging between 7.990.65 to 28.27 1.41Bqkg with mean value of 12.650.69Bqkg for 226Ra, 13.410.69Bqkg to 22.660.89Bqkg with means value 16.260.75Bqkg for 232Th and 197.5712.51 to 376.23.84Bqkg for 40k. The Radium equivalent in samples ranges from 48.41 to 81.98Bqkg with mean value of 55.62Bqkg. Also the external hazard index was found between 0.09 to 0.22 with mean value of 0.14. The value of absorbed dose rates in the samples ranges from 22.95 to 46.64nGyh with mean value of 28.35nGyh. The annual effective dose rate in the studied areas varies from 28 - 57Svy with mean value of 35 Svy .The obtained values of natural radioactivity and gamma-absorbed dose rates due to the activity concentration of 226Ra, 232Th and 40k of soil in air when compared with the international standard shows that none of the studied samples is considered a radiological hazardKeywords: Natural Occurring Radioactive Materials (NORMs), Radioactivity Concentrations.
DOI LINK : 10.56726/IRJMETS51936 https://www.doi.org/10.56726/IRJMETS51936