Competing processes for electron capture to continuum in relativistic ion-atom collisions
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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.
PACS.34.70.+e Charge transfer 41.60.-m Radiation by moving charges
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- M. Nofal et al., AMOP Spring Meeting, Verhandl. DPG (IV) 41, 7/33 (2006) Google Scholar
- M. Nofal et al., GSI Scientific Annual Report, 2005 Google Scholar
- M.E. Rudd, J. Macek, Case Studies in Atomic Physics (North Holland, Amsterdam, 1972), Vol. 3, p. 48 Google Scholar
- R. Shakeshaft, L. Spruch, J. Phys. B 11, L621 (1978) Google Scholar
- D.H. Jakubaßa-Amundsen, Rad. Phys. Chem. (in print, 2006) Google Scholar
- D.H. Jakubaßa-Amundsen, Lecture Notes in Physics, edited by K.O. Groeneveld, W. Meckbach, I.A. Sellin (Springer, Berlin, 1984), Vol. 213, p. 17 Google Scholar
- D. Bjorken, S.D. Drell, Relativistic Quantum Mechanics (BI, Mannheim, 1964) Google Scholar
- E.M. Rose, Relativistic Electron Theory (BI, Mannheim, 1971), Vol. 1, Sect. III Google Scholar
- S. Hagmann, private communication; M. Nofal et al., preprint (2006) Google Scholar