Chemistry
Blessing Ifeyinwa Tabugbo; Rilwan Usman; Mikaila Abdullahi; Jackso Karniliyus
Abstract
In Nasarawa State, groundwater is the most often used source of fresh water for daily consumption, but its quality still remains a serious concern due to rising concentrations of radon resulting from activities of mining. This study evaluated the potential pose resulting from radon exposure via groundwater ...
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In Nasarawa State, groundwater is the most often used source of fresh water for daily consumption, but its quality still remains a serious concern due to rising concentrations of radon resulting from activities of mining. This study evaluated the potential pose resulting from radon exposure via groundwater ingestion and inhalation in Keffi, Nigeria using the liquid scintillation detector. Ten borehole samples of groundwater were collected. The mean content of radon from water samples of Keffi was 19.368 Bq/l. the average ingested and inhaled dose effectiveness annually was 0.099 mSv/y and 4.9 x10-5 mSv/y, respectively. In Keffi, the average ingested extra lifetime cancer risk was 3.5 x10-4 and for inhalation was 1.71 x10-7. Research area's average radon concentration was higher than the standard of 11.1 Bq/l set by the SON and USEPA. Based on the findings of the present work, the radon concentration is unacceptable, hence, inhabitants should be restricted from using the water until measures are put into place. However further analysis could be carried out in the area to prevent people from cancer risk. To cover the entire zone, additional research should be conducted covering additional sources in the study area. As concentrations of radon in water sources varies with time as a result of dilution by rainfall, more examination may be conducted in dry and raining periods.
Physics
M.I. Anthony; O.O. Ige; U Rilwan; O.A. Folasanya; A.A. Muhammed; N.U. Angela; Atef El-Taher
Abstract
In this work, the neutron-induced fissile isotopes of Uranium-235 using the Coupled-Channelled Optical Model code (OPTMAN) code up to 20 MeV. The high demand for nuclear reactor fuels has necessitated this research. As one of the major naturally occurring radionuclides with lots of fuel prospect, Uranium-235 ...
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In this work, the neutron-induced fissile isotopes of Uranium-235 using the Coupled-Channelled Optical Model code (OPTMAN) code up to 20 MeV. The high demand for nuclear reactor fuels has necessitated this research. As one of the major naturally occurring radionuclides with lots of fuel prospect, Uranium-235 occur in 0.71%. Two steps process away from Uranium-235 of neutron capture can produce fissile materials to be used as reactor fuel. Though, Uranium-235 is not with them self a fissile material, but they are breeder reactor fuels. Computations were done for both the Potential Expanded by Derivatives (PED) which account for the Rigid-Rotor Model (RRM) that treat nuclei as rigid vibrating sphere as well as account for nuclear volume conservation and Rotational Model Potentials (RMP) which account for the Soft-Rotator Model (SRM) that treat nuclei as soft rotating spherical deformed shapes. Each of the calculated data was compared with the retrieved data from the Evaluated Nuclear Dada File (ENDF) which was found to be in good agreement. The threshold energies in all cases were found to be ≤ 4 MeV for both PED (Potential Expanded by Derivatives) and RMP (Rotational Model Potentials). It is observed that results from RMP much better agreed with the retrieved data than the one obtained from PED.
Physics
M. I. Anthony; O. O. Ige; U. Rilwan; A. M. Hassan; N.U. Angela; Atef El-Taher
Abstract
In this study, the neutron-induced fissile isotopes of Thorium-232 using the Coupled-Channel Optical Model code (OPTMAN) code up to 20 MeV. The high demand for nuclear reactor fuels has necessitated this research. As one of the major naturally occurring radionuclides with lots of fuel prospect, Thorium-232 ...
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In this study, the neutron-induced fissile isotopes of Thorium-232 using the Coupled-Channel Optical Model code (OPTMAN) code up to 20 MeV. The high demand for nuclear reactor fuels has necessitated this research. As one of the major naturally occurring radionuclides with lots of fuel prospect, Thorium-232 occur in 99.98%. Some steps process away from Thorium-232 on neutron capture can produce fissile materials to be used as reactor fuel. Computations were done for both the Potential Expanded by Derivatives (PED) which account for the Rigid-Rotor Model (RRM) that treat nuclei as rigid vibrating sphere as well as account for nuclear volume conservation and Rotational Model Potentials (RMP) which account for the Soft-Rotator Model (SRM) that treat nuclei as soft rotating spherical deformed shapes. Each of the calculated data was compared with the retrieved data from Evaluated Nuclear Dada File (ENDF) which was found to be in good agreement. The threshold energies in all cases were found to be ≤ 4 MeV for both PED (Potential Expanded by Derivatives) and RMP (Rotational Model Potentials). It is observed that results from RMP much better agreed with the retrieved data than one obtained from PED.
