Department of Mathematics and Sciences, Dhofar University, Salalah, Dhofar, Oman; Department of Physics, Al-Azhar University of Gaza, Gaza, Palestine; Department of Physics, Al-Aqsa University, Gaza Strip, Palestine
Abohassan, Khedr M., Department of Mathematics and Sciences, Dhofar University, Salalah, Dhofar, Oman; Ashour, Hassan S., Department of Physics, Al-Azhar University of Gaza, Gaza, Palestine; Abadla, Mazen M., Department of Physics, Al-Aqsa University, Gaza Strip, Palestine
K.M. Abohassan; Department of Math. & Sc., Dhofar University, Salalah, Oman; email: khedr@du.edu.om