Measurement of Radon Concentration and Radioactivity in Soil Samples of Aramoko, Ekiti State, Nigeria
[1]
Ajiboye Y., Department of Mathematical and Physical Sciences, Afe Babalola University, Ado-Ekiti (ABUAD), Nigeria.
[2]
Badmus O. G., Department of Mathematical and Physical Sciences, Afe Babalola University, Ado-Ekiti (ABUAD), Nigeria.
[3]
Ojo O. D., Department of Mathematical and Physical Sciences, Afe Babalola University, Ado-Ekiti (ABUAD), Nigeria.
[4]
Isinkaye M. O., Department of Physics, Ekiti State University, Ado-Ekiti, Nigeria.
The radon concentration and natural radioactivity in soil of Aramoko, Ekiti State, Nigeria have been determined. The soil gas radon measurement was performed in-situ with Rad7 radon monitor coupled with a soil gas probe. Natural radioactivity measurement in soil samples was carried out using NaI(Tl) gamma spectrometer. This study is aimed at determining the correlation between the radioactivity of the soil and its radon concentration. It was found that the radon concentration of soil gas in the study area ranged from 0.63BqL-1 to 35.04BqL-1 with an average value of 9.82±0.56BqL-1. The average activity concentrations of 238U, 232Th and 40K were found to be 22.62Bq/Kg, 34.74Bq/Kg and 316.72Bq/Kg, respectively. The average radium equivalent and average absorbed dose rates at a height of 1m above the ground are 95.99±62 BqKg-1 and 45.18±27.28 nGyh- respectively. The mean external and internal hazard indices were also found to be 0.26 and 0.32 respectively. All the determined radiological indices values are within the recommended limits.
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