...Mohamed M Rezk Abdelghaffar S Dhmees Mahmoud O Abd El Magied El Sayed A Manaa Hassan S El Gendy Correspondence address. Isotopes Department, Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo 11936, Egypt. Tel: 01143878684 E mail: mahmoud nma yahoo.com 1 12 2019 4 2 2020 25...