A new method of investigation of electron structure in metal surfaces with the aid of positron annihilation

摘要: A method is given for the investigation of momentum distribution γ-quantum annihilation from metal surfaces. The uses interaction between positronium atoms and surface atoms. Possible mechanisms this are discussed conditions under which may be applied defined. was used photon polycrystalline iron aluminium, single-crystalline molybdenum. It shown that parabolic Fe Al differs significantly conduction electron in bulk metal. For Mo crystals it concluded there two states electrons on (100) plane. assumed experimental definition density gradient metal–vacuum interface serve as a criterion allows to estimate some physical properties alloy possibilities new disccussed. [Russian Text Ignored].