• M.A. Lawan,muhammadalhajilawan0416@gmail.com,Department of Physics, Faculty of Sciences, Federal University, Gashua, Yobe State, Nigeria.
• H.A. Sani,,Department of physics, Faculty of science, Sa’adu Zungur University, Gadau, Bauchi state, Nigeria.
• Aliyu M. A,,Department of physics, Faculty of science, Sa’adu Zungur University, Gadau, Bauchi state, Nigeria.
• Bello, Y. I,,Department of physics, Faculty of science, Modibbo Adama University Yola Nigeria.
• M. Sadiq,,Department of physics, Faculty of science, Modibbo Adama University Yola Nigeria.
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