  Recent experiments have reported measurements of rainbow scattering features
in the angular distributions of hyperthermal Ar colliding with LiF(001) [Kondo
et al., J. Chem. Phys. 122, 244713 (2005)]. A semiclassical theory of
atom-surface collisions recently developed by the authors that includes
multiphonon energy transfers is used to explain the temperature dependence of
the measured scattered angular distribution spectra.
