A model for estimating the surface effective mass during collision-induced processes on Pt{111}

The number of surface lattice atoms involved in a particle-surface collision is represented by an effective mass. A model for estimating the effective mass of Pt{111} during the collision with an incident particle is proposed. The effective mass is governed by the collision time which is a function of the incident particleʹs velocity. The effective mass is proposed to increase geometrically with collision time, based on the hexagonal close-packed structure of the Pt lattice. The effective mass model was tested using Ar and Xe scattering data from Pt{111}.