Atom scattering from atomic surfactants: Collisions of argon with a diluteBi : Ga solution

Gas-liquid scattering experiments are used to determine the ways in which s urfactant bismuth atoms alter energy flow in collisions of argon atoms with a liquid solution of 0.02% bismuth: 99.98% gallium. We find that argon-all oy energy exchange and argon scattering intensities are governed by the sur face coverage of Bi atoms. A single Bi monolayer masks the underlying Ga at oms, causing the Ga-rich solution to behave like pure liquid Bi. (C) 2001 A merican Institute of Physics.