1. Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, P.O.Box.29,
Nasr City, Cairo 11787, Egypt
2. Faculty of Science and Humanities - Jubail, Imam Abdulrahman Bin Faisal University, Jubail 35811, Saudi Arabia
3. Faculty of Science, University of Jeddah, Jeddah 23218, Saudi Arabia
4. King Abdulaziz University, Faculty of Science &Arts, Department of Physics, Rabigh 25732, Saudi Arabia