1. Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
2. Physics Department, Faculty of Science, New-Valley University, Egypt
3. Physics Department, Aswan University, Aswan 81528, Egypt
4. Physics Department, Al-Azhar University, Assiut 71524, Egypt
5. Department of Physics, Assiut University, Assiut 71516, Egypt