Affiliation: | 1.Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt ;2.Physics Department, Faculty of Science, Taibah University, Al-Madina al Munawarah, Saudi Arabia ;3.Department of Physics, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia ;4.Department of Physics, University College of Turabah, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia ; |