1. Physics Department, College of Science, Taibah University, P. O. Box 30002, Medina, Saudi Arabia
2. Department of Physics, Faculty of Science, Assiut University, Assiut 71516, Egypt
3. Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 6111, Egypt
4. Department of Physics, Faculty of Science, King Abdulaziz University, 80203 Jeddah, Saudi Arabia