E. M. Darwish and M. Y. Hussein Department of Applied Physics, Faculty of Applied Sciences, Taibah University P. O. Box 1343, Al-Madinah Al-Munawarah, Kingdom of Saudi Arabia Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt Egyptian Center for Theoretical Physics, Modern University for Technology and Information Al-Mukattam, Cairo, Egypt Email Address: eeddarwish@yah...