Differential cross sections for He* scattered by Kr are obtained at three relative energies, 63.6–82.3 meV. Location of rainbow maxima and ’’rapid’’ quantum oscillations, observed at all energies, are used to determine parameters for a double Lennard-Jones potential. The parameters, ε=8.0±0.6 meV and rm=4.8±0.25 Å, are close to those for Li+Kr and are substantially different from those of He+Kr. The effects of direct electronic-energy exchange scattering are observed as excess scattered intensities between 10° and 30° lab. These effects are compared to those arising from chemi-ionization.
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Bentley et al. (1976) studied this question.
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