Distribution of Electrons Scattered by Solids

The distribution in energy and angle of 20-kev electrons scattered by thin foils of representative substances has been measured. The resolution is better than 0.1% in energy and ${10}^{-3\mathrm{}}$ radian in angle. Data are presented for C, Al, Ni, Au of varying thicknesses, Formvar, and ${\mathrm{Al}}_2$ ${\mathrm{O}}_3$. The effects of beam collimation and initial beam "contamination" on the angular distribution of a Cu single crystal are demonstrated.