Theoreticalanalysis for the determination of surface composition in molten Ga-Bi metal alloys by rare gas scattering

摘要

A theoretical model ofclassical mechaniecal atom-surface scattering which includes both single and double collisions from a many-body target is applied tothe determination of surface composition of molten metal alloys by rare gas scattering.Explicit calculations are compared with recently measured data for the scattering of monoenergetic beams of Ar atoms from the surface of liqued Ga-Bi alloys.These calculations indicate that rare gas scattering can provide a precise measure of surface segregatin in the outermost layer of dilute liqued alloys.