Browsing by Author "Nwaogbo, Chidiebere I."

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    Radionuclide depth profile baseline and radiation hazard indices of the reclaimed old Nekede Mechanic Village, Owerri, Imo State, Nigeria
    (U. P., 2021-02-06) Amakom, Chijioke M.; Nkwoada, A. U.; Nwaogbo, Chidiebere I.; Iheonu, Nneka O.
    Radionuclide concentration in soil samples collected at the old Nekede auto-mechanic village in Owerri were determined using gamma spectroscopy. A total of 15 soil samples were collected at depths of 10-cm, 20-cm and 30-cm at 5 different sites respectively. From the results, the mean activity concentrations of 40K, 226Ra, and 232Th 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 40K, 226Ra, and 232Th 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 40K, 226Ra, and 232Th 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-1annual 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 ecommended world average.