Scattering of slow ions by the surface of a solid as a method for measuring electron density

The surface electron densities of polycrystalline tungsten and Mo(110), pure and containing adsorbed oxygen, were determined by the ion beam method (by measuring the energy dependences of currents of scattered slow Ar + ions, 15-300 eV). The electronic term of the collisional Ar/Mo complex was reproduced. The contributions of the Auger and resonance transitions to neutralization of slow argon ions close to the surfaces under study were determined.