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The authors studied the single-electron capture as well as the direct processes occurring when a He2+ ion is scattered by a He target. Doubly differential cross sections were measured for single-electron capture with a collision energy ranging from 2 to 8 keV and a scattering angle varying from 10' to 3'30' (laboratory frame). Single-electron capture into excited states of He+ was found to be the dominant process, confirming the experimental study of Afrosimov et al. (1975). Elastic scattering and ionization differential cross sections were measured for E=6 keV.

Doubly differential cross sections of single-electron capture were measured for He" impinging on a molecular deuterium target. The investigated collision energies are 4, 6 and 8 keV and the scattering angles range from IO' to 2"30' (laboratory frame). The exothermic capture leading lo He'(ls)+D:* was found to be the most important process at low energies and angles, whereas the endothermic channels leading to dissociative capture become the main processes at high scattering angles, i.e. at small impact parameters

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