1. Department of Physics, G. D. C. Darra Adam Khel, F. R. Kohat, KPK, Pakistan
2. Department of Physics, Islamia College University, Peshawar, Pakistan
3. Laboratoire de Physique Quantique et de Modélisation Mathématique, Université de Mascara, Mascara 29000, Algeria
4. Department of Physics and Astronomy, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia