1. Higher Teachers' Training College, University of Maroua 1 , P.O. Box 55, Maroua, Cameroon
2. Faculty of Sciences, University of Maroua 2 , P.O. Box 814, Maroua, Cameroon
3. National Advanced School of Engineering, University of Maroua 3 , P.O. Box 46, Maroua, Cameroon
4. The Max Planck Institute for the Physics of Complex Systems 4 , Nothnitzer Strasse 38, Dresden 01187, Germany
5. Department of Physics, College of Science, Princess Nourah bint Abdulrahman University 5 , P.O. Box 84428, Riyadh 11671, Saudi Arabia
6. Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University 6 , Al-Kharj 11942, Saudi Arabia
7. Department of Physics, Faculty of Science, Ain Shams University 7 , Cairo, Egypt
8. Department of Physics, Faculty of Science, Port Said University 8 , Port Said 42521, Egypt
9. Research Center for Physics (RCP), Department of Physics, Faculty of Science and Arts, Al-Mikhwah, Al-Baha University 9 , Al-Baha 1988, Saudi Arabia