1. Nuclear Materials Authority , P.O. Box 530, El Maddi , Cairo , Egypt
2. Department of Chemistry, Faculty of Science , King Khalid University , Abha 9004 , Saudi Arabia
3. Nuclear Chemistry Department, Hot Laboratory Center , AEA , P.O. 13759 , Cairo , Egypt
4. Egyptian Petroleum Research Institute (EPRI) , 1 Ahmed El-Zomer St., Nasr City , Cairo , Egypt