1. National Institute for Materials Science (NIMS) 1‐2‐1 Sengen 305‐0047 Tsukuba‐shi Ibaraki‐ken Japan
2. Nuclear Materials Authority El Maadi, Cairo Egypt
3. Petrochemical Department Egyptian Petroleum Research Institute (EPRI) Nasr City, Cairo Egypt
4. Chemistry Department Faculty of Science Menoufia University Menoufia Egypt