Calculation of the Absorbed Dose From Single Electron Beam Using Stopping Power Data

Abstract

The radiation energy of electrons will decrease when interacting with a medium due to stopping power. In this study, calculations were performed to determine the reduction of electron beam energy and absorbed dose, assuming the electron motion does not change direction, so radiation stopping power can be neglected. Electron beams with initial energies of 6, 8, and 10 MeV were observed interacting with air, water, and adipose tissue. Graph plotting and integral processing were conducted using OriginPro 8.5 software. Absorbed dose calculations were performed at 100 cm in air, 1 cm and 2 cm in water and adipose tissue, using electron Collision Stopping Power data. The research results indicate that the electron path range in the medium will increase with increasing electron energy and decreasing medium density, with the farthest range observed when electrons are in air. Absorbed dose is directly proportional to Collision Stopping Power; it is known that absorbed dose will increase with increasing electron energy and decrease with electron path length. This study confirms the
decrease in electron energy and absorbed dose with energies of 6, 8, and 10 MeV.