Cross sections for charge transfer in He + -He + collisions have been measured in the centre-of-mass energy range 7-112 keV, using crossed beams and coincident detection of the reaction products. The results obtained are in excellent agreement with previous measurements by Peart et al in the CM energy range 19-57 keV. A two-state coupling calculation with asymptotically correct pseudomolecular states shows that the capture into the ground state of He is approximately only 50% of the total capture cross section at energies below the cross section maximum.
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Melchert et al. (1987) studied this question.
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