Abstract
The energy loss of 28.5–72.2 keV H + specularly reflected off a graphite surface has been measured as a function of the surface temperature. The experimental data enable one to derive the interatomic potential between projectile and graphite surface atom for the intermediate range of interatomic distances. The interatomic potential thus found is in fair agreement with a first order perturbation theory calculation where the Hartree-Fock electron densities have been approximated by a continuous piecewise exponentially decreasing function. The potential is much weaker than the potential derived from the Thomas-Fermi statistical model of the atom.
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