1494-1495 / 3107
e
-
propagating through an absorbing medium interact with atoms by a variety
of elastic or inelastic Coulomb force interactions classified as:
• Inelastic collisions with orbital e
-
(ionization loss).
• Inelastic collisions with nuclei (radiative loss).
• Elastic collisions with orbital e
-
.
Electron interaction with matter
• Elastic collisions with nuclei (nuclear coulomb scattering).
Individual depositions are small and a MV electron may deposit energy at
>10
4
locations
The incident e
-
changes direction of motion and loses a small amount of
kinetic energy through cumulative action of
multiple scattering
events