Electron Bremsstrahlung in Intense Magnetic Fields

In this paper we present detailed calculations of the most important radiation process in ponderable matter in the presence of an intense magnetic field: the electron bremsstrahlung. This differs from an ordinary bremsstrahlung process in that in a magnetic field the electrons are one-dimensional particles free to move in the direction of the field, but bound in the plane perpendicular to the magnetic field in quantized circular orbits with energy (in the nonrelativistic limit) in multiples of $11.9\times {10}^{-9\mathrm{}}H$ eV, where $H$ is the magnetic field in gauss. We have obtained the emission rate and the absorption coefficient for fields much less than ${10}^{13}$ G. This calculation is valid in the large quantum number limit.