Accurate close-coupling calculations are performed for helium interacting with rare-gas-plated graphite. The atom-surface potentials used in this study are based upon pairwise additivity of atom-atom interactions, and the role of three-body forces is explored. Comparison between theoretical calculations which in turn include and exclude three-body forces indicates that experimental data are sensitive to three-body forces. Further comparison between theoretical calculations and experimental data for helium scattering from either krypton- or xenon-plated graphite yields semiquantitative agreement. Inasmuch as there are no adjustable parameters employed in the input potentials, it is concluded that these systems are well understood.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics