1. Department of Chemistry, Faculty of Science, Al-Azhar University, P. O. 71452, Assiut, Egypt
2. Department of Physics, College of Science, Taif University, P. O. Box 11099, Taif, 21944, Saudi Arabia
3. Physics Department, Faculty of Science, King Khalid University, Abha 61413, Saudi Arabia
4. Department of Physics, Faculty of Science, Assiut University, Assiut, 71516, Egypt