The Scattering of Positive Ions from a Platinum Surface

Abstract

The velocity and intensity of positive ions scattered at various angles from a metal surface have been measured by allowing the ions scattered from a heated platinum target to pass through slits into the electric and magnetic analysing fields of a positive ray box. The source, oxide catalyst emitting potassium, caesium, or lithium ions, could be rotated round the target, so that the latter could be bombarded from any angle. When the target was brought to a red heat the intensity of scattering was markedly increased, presumably because of the removal of a layer of adsorbed gas.