Abstract.
The relative importance of the two mechanisms for the capture of a target electron by a fast, heavy projectile, radiative ionization (RI) and Coulomb capture to continuum (ECC), is studied in the vicinity of the forward peak. For both processes a consistent relativistic description, based on the impulse approximation, is provided. It is found that the differential cross-sections scale with the projectile charge and exhibit a common velocity dependence. As a result, RI starts to dominate over ECC near the same impact energy (~11 MeV/amu) for arbitrary bare projectiles colliding with hydrogen. For electrons from the inner shells of heavier targets this energy increases, however, which is confirmed by a coincidence experiment on 90 MeV/amu U88+ + N2.
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Jakubaßa-Amundsen, D. Competing processes for electron capture to continuum in relativistic ion-atom collisions. Eur. Phys. J. D 41, 267–274 (2007). https://doi.org/10.1140/epjd/e2006-00201-5
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DOI: https://doi.org/10.1140/epjd/e2006-00201-5