Affiliation: | 1. Materials Science Lab. (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt 2. Experimental Physics Department, Nuclear Research Center Atomic Energy Authority, Cairo, Egypt 3. Materials Science and Nanotechnology Department, Faculty of Post Graduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, Egypt 4. Department of Physics, Faculty of Girls for Arts, Science and Education, Ain Shams University, Cairo, Egypt
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