Zeitschrift für Physik A Atoms and Nuclei

, Volume 313, Issue 4, pp 281–288 | Cite as

3dσ excitation in slow Ne-Ar collisions

  • R. Shanker
  • R. Hippler
  • U. Wille
  • R. Bilau
  • H. O. Lutz


The impact parameter dependence of ArL-shell excitation in Ne-Ar collisions has been studied at collision energies of 200, 400 and 700 keV. Experimental vacancy production rates have been obtained by observing Ar-L Auger electrons in coincidence with scattered ions. A theoretical analysis of the experimental data has been performed by assuming vacancy production in the quasimolecular 3 orbital to be the dominant mechanism for ArL-shell excitation. Probabilities have been calculated separately for 3 excitation via 3-3-3 rotational coupling and via direct coupling to the continuum. The data at large impact parameters (where the calculated contribution from direct ionization is negligibly small) can be understood solely in terms of rotationally induced 3 excitation. The enhancement of the vacancy production rate over the rotational-coupling contribution observed for smaller impact parameters is explained qualitatively by the onset of direct 3 ionization. Total cross sections for Ar-L vacancy production have been determined experimentally for collision energies ranging from 70 to 700 keV, and have been analyzed also in terms of 3 excitation.


Auger Collision Energy Large Impact Total Cross Section Impact Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Briggs, J.S.: Rep. Prog. Phys.39, 217 (1976)Google Scholar
  2. 2.
    Lichten, W.: J. Phys. Chem.84, 2102 (1980)Google Scholar
  3. 3.
    Briggs, J.S.: Fundamental processes in energetic atomic collisions. Lutz, H.O., Briggs, J.S., Kleinpoppen, H. (eds.). New York: Plenum 1983Google Scholar
  4. 4.
    Meyerhof, W.E., Taulbjerg, K.: Annu. Rev. Nucl. Sci.27, 279 (1977)Google Scholar
  5. 5.
    Schuch, R.: Physics of electronic and atomic collisions. Datz, S. (ed.), p. 151. Amsterdam: North-Holland 1982Google Scholar
  6. 6.
    Shanker, R., Bilau, R., Hippler, R., Wille, U., Lutz, H.O.: J. Phys. B: At. Mol. Phys.14, 997 (1981)Google Scholar
  7. 7.
    Warczak, A., Liesen, D., Mokier, P.H., Schönfeldt, W.A.: Phys. Lett.84 A, 239 (1981)Google Scholar
  8. 8.
    Shanker, R., Hippler, R., Wille, U., Bilau, R., Lutz, H.O.: J. Phys. B: At. Mol. Phys.15, L495 (1982)Google Scholar
  9. 9.
    Presser, G., Stähler, J., Werner, R., Wille, U.: J. Phys. B: At. Mol. Phys.16, 197 (1983)Google Scholar
  10. 10.
    Morenzoni, E., Nessi, M., Bürgy, P., Stoller, Ch., Wölfi, W.: Z. Phys. A — Atoms and Nuclei311, 7 (1983)Google Scholar
  11. 11.
    Briggs, J.S.: J. Phys. B: At. Mol. Phys.8, L485 (1975)Google Scholar
  12. 12.
    Meyerhof, W.E.: Phys. Rev. A18, 414 (1978)Google Scholar
  13. 13.
    Anholt, R.: Z. Phys. A — Atoms and Nuclei295, 201 (1980)Google Scholar
  14. 14.
    Kessel, Q.C.: Case studies in atomic physics. Vol. 1, McDaniel, E.W., McDowell, M.R.C. (eds.), p. 399. Amsterdam: North-Holland 1969Google Scholar
  15. 15.
    Shanker, R., Hippler, R., Wille, U., Lutz, H.O.: J. Phys. B.: At. Mol. Phys.15, 2041 (1982)Google Scholar
  16. 16.
    Luz, N., Sackmann, S., Lutz, H.O.: J. Phys. B: At. Mol. Phys.12, 1973 (1979)Google Scholar
  17. 17.
    Eichler, J., Wille, U.: Phys. Rev.A11, 1973 (1975)Google Scholar
  18. 18.
    Garvey, R.H., Jackman, C.H., Green, A.E.S.: Phys. Rev.A12, 1144 (1975)Google Scholar
  19. 19.
    Schneider, D., Nolte, G., Wille, U., Stolterfoht, N.: Phys. Rev.A28, 161 (1983)Google Scholar
  20. 20.
    Wille, U.: J. Phys. B: At. Mol. Phys.16, L275 (1983)Google Scholar
  21. 21.
    Wille, U.: Z. Phys. A — Atoms and Nuclei308, 3 (1982)Google Scholar
  22. 22.
    Desclaux, J.P.: At. Data Nucl. Data Tables12, 311 (1973)Google Scholar
  23. 23.
    Carlson, T.A., Nestor, Jr., C.W., Wasserman, N., McDowell, J.D.: At. Data2, 63 (1970)Google Scholar
  24. 24.
    Schneider, D., Stolterfoht, N.: Phys. Rev.A24, 2438 (1981)Google Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • R. Shanker
    • 1
  • R. Hippler
    • 1
  • U. Wille
    • 2
    • 3
  • R. Bilau
    • 1
  • H. O. Lutz
    • 1
  1. 1.Fakultät für PhysikUniversität BielefeldFederal Republic of Germany
  2. 2.Bereich Kern- und StrahlenphysikHahn-Meitner-Institut für Kernforschung Berlin GmbHGermany
  3. 3.Fachbereich PhysikFreie Universität BerlinGermany

Personalised recommendations