Phys. Rev. Lett. 81, 3627–3630 (1998)Momentum Images of Continuum Electrons from He+ and He2+ on He: Ubiquity of π Structure in the ContinuumReceived 1 May 1998; published in the issue dated 26 October 1998 Cold target recoil ion momentum spectroscopy has been used to image the momentum distributions of continuum electrons liberated in the impact of slow He+ and He2+ ions on He. The distributions were measured for fully determined vector impact parameter. The spectra show that the electron momenta lie mainly in the collision plane and display a structure which strongly suggests that it is π states which are dominantly promoted into the continuum in such collisions, but that interfering σ and perhaps δ amplitudes are also important. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3627
DOI:
10.1103/PhysRevLett.81.3627
PACS:
34.50.Fa, 39.30.+w
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