1. Solid State and Accelerator Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Nasr City, Egypt
2. Faculty of Engineering, Zagazig University, Zagazig city, Egypt
3. Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority(EAEA), Nasr City, Egypt