Journal of Nuclear and Particle Physics
pISSN: 21676895 eISSN: 21676909
2021; 11(1): 16
doi:10.5923/j.jnpp.20211101.01
Received: Dec. 15, 2020; Accepted: Jan. 6, 2021; Published: Feb. 6, 2021
Chijioke M. Amakom^{1}, Amarachi U. Nkwoada^{2}, Chidiebere I. Nwaogbo^{1}, Nneka O. Iheonu^{3}
^{1}Department of Physics, Federal University of Technology, Owerri
^{2}Department of Chemistry, Federal University of Technology, Owerri
^{3}Department of Mathematics, Federal University of Technology, Owerri
Correspondence to: Chijioke M. Amakom, Department of Physics, Federal University of Technology, Owerri.
Email: 
Copyright © 2021 The Author(s). Published by Scientific & Academic Publishing.
This work is licensed under the Creative Commons Attribution International License (CC BY).
http://creativecommons.org/licenses/by/4.0/
Radionuclide concentration in soil samples collected at the old Nekede automechanic village in Owerri were determined using gamma spectroscopy. A total of 15 soil samples were collected at depths of 10cm, 20cm and 30cm at 5 different sites respectively. From the results, the mean activity concentrations of ^{40}K, ^{226}Ra, and ^{232}Th were 132.66±5.61 Bq/Kg, 26.38±3.88 Bq/Kg, and 73.24±4.91 Bq/Kg respectively for samples collected at 10cm depth. At 20cm depth the mean values obtained were 111.95±6.51 Bq/Kg, 32.63±3.48 Bq/Kg, and 89.76±5.20 Bq/Kg for ^{40}K, ^{226}Ra, and ^{232}Th respectively, while 102.88±4.62 Bq/Kg, 30.03±2.77 Bq/Kg, and 76.08±6.65 Bq/Kg were obtained at the 30 cm depth for ^{40}K, ^{226}Ra, and ^{232}Th respectively. The calculated absorbed dose rate and annual effective dose have an average value of 66.6687 nGyh^{1} and 0.0912 mSv.y^{1}. The 10cm depth presented the lowest dose rate and annual effective dose rate with values of 61.9564 nGyh^{1 }and 0.0847 mSv.y^{1} respectively. While the highest values were obtained at 30cm depth with values of 64.0913 nGyh^{1} and 0.0876 mSv.y^{1 }respectively. The value of the annual effective dose lies within the world average value of 1.0 mSvy^{1} annual effective dose equivalent rate. The hazard indices corresponding to the collected samples was also estimated to have a mean value of 0.142, which is below the recommended world average.
Keywords: Radionuclide concentration, External and Hazard indices, Mechanic village, Annual effective dose
Cite this paper: Chijioke M. Amakom, Amarachi U. Nkwoada, Chidiebere I. Nwaogbo, Nneka O. Iheonu, Radionuclide Depth Profile Baseline and Radiation Hazard Indices of the Reclaimed Old Nekede Mechanic Village, Owerri, Imo State, Nigeria, Journal of Nuclear and Particle Physics, Vol. 11 No. 1, 2021, pp. 16. doi: 10.5923/j.jnpp.20211101.01.
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Figure 1. Average activity profile of the radionuclides with soil depth profile 


Figure 2. Distributive pattern of hazard indices with soil depth profile 
Figure 3. The calculated Raeq for different lithology of the soil sample 