Charged Particle Interactions with Matter

Abstract

The photon interactions transfer energy to electrons, and it is these electrons that deliver dose as they slow down in matter. To understand the basic physics involved, we will start with an important derivation for heavy charged particles that will then be generalized to eventually work for electrons slowing down in condensed matter. It is in fact remarkable that this extension to electrons works as well as it does. Interactions of Heavy Charged Particles Stopping Power and Mass Stopping Power Collisional Mass Stopping Power for Heavy Charged Particles Soft Collision Mass Stopping Power for Heavy Charged Particles Hard Collision Mass Stopping Power for Heavy Charged Particles Shell Correction Dependence of the Stopping Power on the Medium Mass Collisional Stopping Power Dependence on Particle Velocity Mass Collisional Stopping Power Dependence on Particle Charge Electron and Positron Interactions