On the energy loss of slow electrons due to dielectric relaxation

We derive an approximate formula for a novel form of energy loss experienced by 1-10 eV electrons passing through polar liquids. This loss mechanism, which depends on the translational motions of polar molecules in the Coulomb field of an electron is shown to yield a dissipation rate comparable in magnitude with the prediction of the Fröhlich-Platzman theory, which allows only for the rotational motion of polar molecules (Debye relaxation mechanism).