World Journal of Applied Physics

Archive

Volume 2, Issue 4, November 2017

  • The Electrical Polarization of the Earth in Its Orbital Motion

    Yuri Pivovarenko

    Issue: Volume 2, Issue 4, November 2017
    Pages: 97-100
    Received: 9 August 2017
    Accepted: 30 August 2017
    Published: 25 September 2017
    DOI: 10.11648/j.wjap.20170204.11
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    Abstract: In the course of its orbital motion, the Earth continuously crosses the magnetic field lines of the Sun. For this reason, the Earth is constantly exposed to the electromagnetic force, which is directed to the Sun. This force may cause the movement of the earth's positive charges in the direction of the Sun and the movement of the earth's negative c... Show More
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  • Analytic Spin and Pseudospin Solutions to the Dirac Equation for the Manning-Rosen Plus Hellmann Potential and Yukawa-Like Tensor Interaction

    Louis Hitler, Benedict Iserom Ita, Pigweh Amos Isa, Innocent Joseph, Nzeata-Ibe Nelson, Thomas Odey Magu, Opara Ivan

    Issue: Volume 2, Issue 4, November 2017
    Pages: 101-108
    Received: 29 August 2017
    Accepted: 14 September 2017
    Published: 23 October 2017
    DOI: 10.11648/j.wjap.20170204.12
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    Abstract: The Dirac equation was solved for the Manning-Rosen plus Hellmann potential including a Yukawa-like tensor potential with arbitrary spin-orbit coupling quantum number κ. In the framework of the spin and pseudospin (pspin) symmetry, the energy eigenvalue equation and the corresponding eigenfunctions were obtained in closed form by using the Nikiforo... Show More
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  • Wkb Solutions for Inversely Quadratic Yukawa plus Inversely Quadratic Hellmann Potential

    Louis Hitler, Benedict Iserom Ita, Pigweh Amos Isa, Nzeata-Ibe Nelson, Innocent Joseph, Opara Ivan, Thomas Odey Magu

    Issue: Volume 2, Issue 4, November 2017
    Pages: 109-112
    Received: 29 August 2017
    Accepted: 14 September 2017
    Published: 23 October 2017
    DOI: 10.11648/j.wjap.20170204.13
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    Abstract: The exact energy spectrum for inversely quadratic Yukawa plus potential plus inversely quadratic Hellmann potential was obtained, via the WKB approach. Also three special cases of the potential have been considered and their energy eigenvalues obtained.
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  • Theoretical Studies of Positron Annihilation in Aluminum Bismuth Alloy

    Noureddine Amrane, Maamar Benkraouda

    Issue: Volume 2, Issue 4, November 2017
    Pages: 113-118
    Received: 30 July 2017
    Accepted: 5 September 2017
    Published: 11 November 2017
    DOI: 10.11648/j.wjap.20170204.14
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    Abstract: Electron and positron charge densities are calculated as a function of position in the unit cell for Aluminum Bismuth binary compound. Wave functions are derived from pseudopotential band structure calculations and the independent particle approximation (IPM), respectively, for the electrons and the positrons. It is observed that the positron densi... Show More
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  • The Role of Polarization and Spontaneous Emission in Lasing on the Basis of Maxwell’s Equations

    Khalid Mohammed Haroun, Mubarak Dirar Abd-Alla, Ibrahim Adam Ibrahim Hammad, Arafa Ahmed Mohamed, Abakkar Ali Abdallah, Somia Eltahir Ali, Adam Mohamed Adam Bakheet

    Issue: Volume 2, Issue 4, November 2017
    Pages: 119-123
    Received: 8 October 2017
    Accepted: 27 October 2017
    Published: 27 November 2017
    DOI: 10.11648/j.wjap.20170204.15
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    Abstract: This research paper mainly aims to investigate the effect of polarization and susceptibility in amplifying light and producing laser using Maxwell equations, which consist of polarization term, and using quantited density matrix. It was shown that the polarization and the susceptibility both contributors to amplification. Strictly speaking, both st... Show More
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