Diffusion of fast electrons in the presence of a magnetic field

Abstract
The Boltzman equation, for energy deposited by fast electrons in the presence of an applied magnetic field, is solved in the diffuse beam approximation. The solution is obtained by a simple coordinate transformation which is valid both when λ/rL⩽0.25 (λ = mean free path, rL = Larmor radius) and when λ/rL ⩾4.5. The half‐space solution is used to determine the dose in a gas. The theoretical results are compared with experiments. It is found that agreement is better than *10% for cases of interest.