Physics Bucharest 2017

Electron interaction with matter

• Same mass of the atomic e- to which they transfer energy in collisional events • Multiple elastic collisions of a high- energy e - (multiple scattering) produce multiple small angle deflections • The e - follows a zigzag path (it can also be back-scattered) while it continuously loses kinetic energy through inelastic collisions with atoms • Individual depositions are small and an electron may deposit energy at >10 4 locations