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Results are presented for two studies of the scattering by room-temperature helium of beams of helium atoms with controlled energies in the approximate range 150–1500 ev. The interaction potential derived from the two sets of measurements is represented by φ(r)=5.56×10−12/r5.03 erg (0.97 Ar1.48 A).Where there are common ranges of the interaction distance r this potential is in reasonable agreement with He–He potentials previously determined from scattering experiments. In its specified range of validity, it is somewhat lower than most of the corresponding values calculated quantum mechanically.
Amdur et al. (Mon,) studied this question.
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