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An attempt is made to examine the contribution that the study of “charge transfer into continuum states” and “projectile ionisation” has made to our overall understanding of charge exchange and ionisation and the link between them. Velocity spectra for electrons ejected in the forward direction during collisions of H2+ and He+ (0.8 – 2.8 MeV) with gas targets are shown together with...
Autoionisation processes have been investigated in Ar+ + Ar and O+ + Ar collision system using the method of zero-degree spectroscopy. All the spectra were dominated by the ELC cusp, with autoionisation peaks appearing symmetrically on both sides of the wings. The energy of the autoionisation electrons were found to be as low as 8 meV with respect to the parent ion, and the analysis indicated that...
A brief historical account of the experimental and theoretical studies of charge exchange and projectile ionisation is shown to lead to the development of the concepts of ECC and ELC. Recent data on cusp peaks are discussed in relation to their overall width, differential cross section and asymmetry. It is concluded that we have obtained reasonable agreement for the cross sections for ECC and ELC...
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