Polarization of Electrons by Double Scattering

THE general theory of the polarization of electrons by double scattering has been given by Mott1, but detailed calculation of the percentage asymmetry to be expected in the azimuthal distribution after the second scattering at 90° has only been carried out for scattering fields of pure Coulomb type. In view of the fact that experiments have so far revealed no appreciable asymmetry under conditions when an appreciable percentage effect would be expected (for scattering of 79 kv. electrons by gold)2, it is important that detailed analysis of expected effects for other types of scattering field should be carried out.