Scattering experiments with fast hydrogen atoms. Velocity dependence of the integral elastic cross section with the rare gases in the energy range 0.01–1.00 eV

Authors:
  • RBR. W. Bickes
    R. W. Bickes
  • BLB. Lantzsch
    B. Lantzsch
  • JTJ. P. Toennies
    J. P. Toennies
  • KWK. Walaschewski
    K. Walaschewski
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Abstract
Integral elastic cross sections of hydrogen atoms scattered by rare gases have been measured in the velocity range 1.4–14 × 105 cm s–1(0.01 < Ecm < 1.00 eV). The experimental data have been fitted to the Lennard-Jones and exp (α,6) potential models and are found to provide information on the attractive and repulsive parts of the potential. The potential well parameters ε, Rm and the Born-Mayer repulsive potential parameters A, α have been determined for all of the rare gases. These ε, Rm parameters, in combination with the corresponding rare gas dimer parameters, are shown to be consistent with combining rules.