OBSERVATION OF DIRECT INELASTIC-SCATTERING IN THE PRESENCE OF TRAPPING-DESORPTION SCATTERING - XE ON PT(111)

Velocity and angular distributions for Xe scattered from clean Pt(111) have been observed which permit the scattering process to be experimentally divided into a direct inelastic channel and a trapping-desorption channel. The trapping-desorption channel leads to Maxwellian velocity distributions at the surface temperature and a cos angular dependence, while the direct inelastic channel exhibits a linear relationship between exit kinetic energy and both incident kinetic energy and surface temperature. © 1979 The American Physical Society.