American Journal of Physics and Applications

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Volume 5, Issue 5, September 2017

  • Construction of Sheet Resistance Measurement Setup for Tin Dioxide Film Using Four Probe Method

    Rikesh Bhattarai, Shankar Prasad Shrestha

    Issue: Volume 5, Issue 5, September 2017
    Pages: 60-65
    Received: 16 January 2017
    Accepted: 25 January 2017
    Published: 3 August 2017
    DOI: 10.11648/j.ajpa.20170505.11
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    Abstract: The main purpose of the paper is to construct the four probes to calculate the sheet resistance the thin film. For the thin film this paper presents the experimental preparation of Tin dioxide thin films. A dual voltage power supply and constant current source is developed to study deeply for the constant current output. Electrical properties are m... Show More
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  • Instrumental Quality Control of Therapeutic Linear Accelerator Performance

    Mohammed Ahmed Ali Omer

    Issue: Volume 5, Issue 5, September 2017
    Pages: 66-72
    Received: 19 July 2017
    Accepted: 28 July 2017
    Published: 16 August 2017
    DOI: 10.11648/j.ajpa.20170505.12
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    Abstract: The objective of the article was to assess therapeutic linear accelerator performance. Material & method used were quality control tools, direct measurement & theoretical calculation methods. The analysis of results showed that: shift of machine isocenter was 1 mm then increases up to 2 mm through the gantry angles 0 to 300° and 300 to 360 respecti... Show More
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  • Charge Exchange of Proton Sodium Atom Collision

    Sabbah A. Elkilany

    Issue: Volume 5, Issue 5, September 2017
    Pages: 73-79
    Received: 22 June 2017
    Accepted: 7 August 2017
    Published: 11 October 2017
    DOI: 10.11648/j.ajpa.20170505.13
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    Abstract: The coupled static approximation is modified for the first time to make it applicable to multi-channels problem of the collision of the proton by alkali atom. The possibility of producing more hydrogen during the proton-alkali atom collision is investigated. The formation of hydrogen H(1s) and excited hydrogen (in 2s- and 2p-states) of the scatteri... Show More
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