Browsing by Author "Liman, M.S."

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    COMPUTATION OF ELECTRONIC STRUCTURE OF AN ATOM IN THE HARTREE-FOCK APPROXMATION
    (Department of Physics, Nasarawa State University Keffi, 2016-08-28) Anyanninuola, O.S.; Ewa, I.I.; Umar, I.; Liman, M.S.
    In this work, FORTTRAN program has been applied to evaluate the energy level of generally small atomic systems. The program was specifically directed to compute the Hartree-Fock equations. The ground state structures of small atomic systems are obtained using Hartree-Fock approximation. The total energies calculated for each of the state (1s, 2s, 2p) approximately agreed with those of experimental results as compared. Due to non-linearities introduced by Hartree-Fock approximation, the equations are solved using non-linear method such as iteration. The physical implication of this important finding has helped to identified clearly the parameter space accessible to the Hartree-Fock method.
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    Simulation of heating in space plasma
    (Department of Physics, Nasarawa State University Keffi, 2015-12-11) Umar, S.A.; Ibrahim, G.G.; Ibrahim, I.E.; Najib, M.U.; Liman, M.S.
    Computer simulation was employed here to study the process of heating in space plasmas. In the simulation, the one-dimensional particle-in-cell simulation method was used and the Maxwell’s Equations solved using the Finite Difference Time Domain (FDTD) method. The modified one-dimensional Kyoto University electromagnetic particle code with relativistic effect consideration (MATLAB Version) was used. The simulation results obtained is a plot of energy, which shows heating at the beginning of the simulation with the system reaching its thermodynamic equilibrium later in the simulation. Other results obtained where the velocity vector space plot showing a drift maxwellian nature, indicating collisions between particles and two other Spatial Electric and Magnetic fields plots. The results in the simulation showed that the heating in the space plasmas are caused mainly by binary collisions between the particles. _____________________________________________________________________________________________