Mona Mohsen
                            
                                
                            
                            
                            
                                Professor, Physics Department, Faculty of Science, Ain Shams University, Egypt
                            
                            Research Areas
                            
                                1- Defect structure in nanomaterials using Positron Annihilation  Spectroscopy:         - Structural study of Nickel doped Zinc Oxide for application in solar              Cells.-Study of the effect of gamma irradiation on some polymers used in