An Application of Electron Diffraction to the Study of Gas Adsorption

Under appropriate experimental conditions, electron scattering by a single crystal of nickel can give rise to diffraction patterns of four quite distinct types. We attribute one of these patterns to the space lattice of the nickel crystal, one to the topmost layer of nickel atoms, one to a monatomic layer of adsorbed gas atoms, and one to a thick layer of gas atoms. From these phenomena some conclusions concerning gas adsorption have been drawn. We have at hand a new and important method of crystal analysis.