A modified ECPSSR theory for light-ion induced K-shell ionization

  • O. Benka
  • M. Geretschläger
  • H. Paul
Classical Collisional Ionization
Part of the Lecture Notes in Physics book series (LNP, volume 294)


The direct Coulomb K-shell ionization process can be generally well described by the ECPSSR theory, but there are significant deviations at low projectile velocities. In this paper we present two modifications of the theory: The effect of the projectile on the target K-electron is not only taken into account by a higher binding energy (binding effect), but also by an increased electron velocity which correponds to a united atom in the extreme low velocity limit (when the Coulomb deflection is neglected). At higher velocities, ECPSSR remains unchanged. The effect of the Coulomb deflection upon the relativistic correction leads to a modification of this correction. Our modified theory (MECPSSR) is compared to empirical cross sections, and better agreement is found.


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Literature References

  1. [1]
    H.Paul, J.Muhr, Phys. Reports 135, No. 2 (1986) 47Google Scholar
  2. [2]
    H.Paul, Z. Phys. D 4 (1987) 249Google Scholar
  3. [3]
    W.Brandt, G.Lapicki, Phys. Rev. A 23 (1981) 1717Google Scholar
  4. [4]
    G.Lapicki, Abstr. of Contr. Papers, 14th Int. Conf. Physics of Electronic and Atomic Coll. (North Holland Publ. Co., Amsterdam, 1985) p. 402Google Scholar
  5. [5]
    H.Paul, Nucl. Instr. Meth. B 4 (1984) 211Google Scholar
  6. [6]
    M.Geretschläger, O.Benka, Phys. Rev. A 34 (1986) 866Google Scholar
  7. [7]
    J.M.Hansteen, L.Kocbach, A.Graue, Phys. Scripts 31 (1985) 63Google Scholar
  8. [8]
    G.Basbas, W.Brandt, R.Laubert, Phys. Rev. A 7 (1973) 983Google Scholar
  9. [9]
    D.Land, Nucl. Instr. Meth. B 24 (1987) 252Google Scholar
  10. [10]
    E.Laegsgaard, U.J.Andersen, M.Lund, Proc. of the 10th Int. Conf. on Physics of Electronic and Atomic Coll. (North Holland Publ Co., Amsterdam, 1977)Google Scholar
  11. [11]
    see also fig. 6 in ref. [5]Google Scholar
  12. [12]
    R.J.Maurer, R.L.Watson, Atom. Dat. Nucl. Dat. Tab. 34 (1986) 185Google Scholar
  13. [13]
    W.Brandt, G.Lapicki, Phys. Rev. A 20 (1979) 465Google Scholar
  14. [14]
    R.Anholt, Phys. Rev. A 17 (1978) 983Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • O. Benka
    • 1
  • M. Geretschläger
    • 1
  • H. Paul
    • 1
  1. 1.Johannes Kepler Universität LinzLinzAustria

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