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Orbital alignment dependence of electron transfer cross sections

I: H+-Na(3p) near the matching velocity
  • U. Müller
  • H. A. J. Meijer
  • N. C. R. Holme
  • M. Kmit
  • J. H. V. Lauritsen
  • J. O. P. Pedersen
  • C. Richter
  • J. W. Thomsen
  • N. Andersen
  • S. E. Nielsen
Original contributions

Abstract

This paper reports experimental and theoretical results for the influence of target excitation and orbital alignment on the charge exchange process for the system H+-Na(3s, 3p). The experimental velocity range covers for the first time the region around and beyond the “matching velocity” of 0.47 a.u. of the Na(3p) state, i.e. the velocity characteristic of the orbital motion of the valence electron. The cross section parameters are found to depend sensitively on collision velocity, with a qualitatively different behaviour below and above the matching velocity. The results for the orbital alignment dependence support the intuitive picture that, when going beyond the matching velocity, electron transfer becomes increasingly favoured when the orbital velocity of the active electron has a component parallel to the collision velocity. Agreement with earlier experimental and theoretical results at lower velocities is good and allows conclusions about the quality of theoretical approximations in the various velocity regimes.

PACS

34.00 34.70 32.80 

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References

  1. 1.
    Kushawaha, V.S., Burkhardt, C.E., Leventhal, J.J.: Phys. Rev. A45, 1686 (1980); Kushawaha, V.S.: Z. Phys. A313, 155 (1983)Google Scholar
  2. 2.
    Royer, T., Dowek, D., Houver, J.C., Pommier, J., Andersen, N.: Z. Phys. D10, 45 (1988)Google Scholar
  3. 3.
    Roller-Lutz, Z., Finck, K., Wang, Y., Lutz, H.O.: Phys. Lett A169 173 (1992)Google Scholar
  4. 4.
    Roller-Lutz, Z., Wang, Y., Finck, K., Lutz, H.O.: Phys. Rev. A47 R13 (1993)Google Scholar
  5. 5.
    Gieler, M., Aumayr, F., Hütteneder, M., Winter, H.: J. Phys. B24, 4419 (1991)Google Scholar
  6. 6.
    Gieler, M., Aumayr, F., Schweinzer, J., Koppensteiner, W., Husinsky, W., Winter, H.P., Lozhkin, K., Hansen, J.P.: J. Phys. B26, 2137 (1993)Google Scholar
  7. 7.
    Schlatmann, A.R., Hoekstra, R., Morgenstern, R., Olson, R.E., Pascale, J.: Phys. Rev. Lett.71, 513 (1993)Google Scholar
  8. 8.
    Fritsch, W.: Private communication to D. Dowek (1990)Google Scholar
  9. 9.
    Dubois, A., Nielsen, S.E., Hansen, J.P.: J. Phys. B26, 705 (1993)Google Scholar
  10. 10.
    Allan, R.J., Courbin, C., Salas, P., Wahnon, P.: J. Phys. B23, L461 (1990)Google Scholar
  11. 11.
    Aumayr, F., Gieler, M., Schweinzer, J., Winter, H., Hansen, J.P.: Phys. Rev. Lett.68, 3277 (1992)Google Scholar
  12. 12.
    Wörmann, Th., Roller-Lutz, Z., Lutz, H.O.: Phys. Rev. A47, R1594 (1993)Google Scholar
  13. 13.
    Hansen, S.B., Ehrenreich, T., Horsdal-Pedersen, E., MacAdam, K.B., Dubé, L.J.: Phys. Rev. Lett.71, 1522 (1993)Google Scholar
  14. 14.
    Wang, J., Olson, R.E.: Phys. Rev. Lett.72, 332 (1994)Google Scholar
  15. 15.
    Wang, J., Olson, R.E.: J. Phys. B27, 3707 (1994)Google Scholar
  16. 16.
    Ehrenreich, T., Day, J.C., Hansen, S.B., Horsdal-Pedersen, E., MacAdam, K.B., Mogensen, K.S.: J. Phys. B27, L383 (1994)Google Scholar
  17. 17.
    Bradenbrink, S., Reihl, H., Wörmann, Th., Roller-Lutz, Z., Lutz, H.O.: J. Phys. B27, L391 (1994)Google Scholar
  18. 18.
    Lundsgaard, M.V.F., Toshima, N., Chen, Z., Lin, C.D.: J. Phys. B27, L611 (1994)Google Scholar
  19. 19.
    Kohring, G.A., Wetmore, A.E., Olson, R.E.: Phys. Rev. A28, 2526 (1983)Google Scholar
  20. 20.
    Campbell, E.E.B., Hertel, I.V., Nielsen, S.E.: J. Phys. B24, 3277 (1991)Google Scholar
  21. 21.
    Schippers, S., Schlatmann, A.R., Morgenstern, R.: Phys. Lett. A181, 80 (1993)Google Scholar
  22. 22.
    Dowek, D., Houver, J.C., Pommier, J., Richter, C., Royer, T., Andersen, N. Pálsdottir, B.: Phys. Rev. Lett.64, 1713 (1990)Google Scholar
  23. 23.
    Richter, C., Dowek, D., Houver, J.C., Andersen, N.: J. Phys. B23, 3925 (1990)Google Scholar
  24. 24.
    Houver, J.C., Dowek, D., Richter, C., Andersen, N.: Phys. Rev. Lett.68, 162 (1992)Google Scholar
  25. 25.
    Schippers, S., Schlatmann, A.R., Wiersema, W.P., Hoekstra, R., Morgenstern, R., Olson, R.E., Pascale.: J. Phys. Rev. Lett.72, 1628 (1994)Google Scholar
  26. 26.
    Courbin, C., Allan, R.J., Salas, P. Wahnon, P.: J. Phys. B23, 3909 (1990)Google Scholar
  27. 27.
    Richter, C., Andersen, N., Brenot, J.C., Dowek, D., Houver, J.C., Salgado, J., Thomsen, J.W.: J. Phys. B26, 723 (1993)Google Scholar
  28. 28.
    Fischer, A., Hertel, I.V.: Z. Phys. A304, 103 (1982)Google Scholar
  29. 29.
    Kelly, J.F., Gallagher, A.: Rev. Sci. Instrum.58, 563 (1987)Google Scholar
  30. 30.
    Thomsen, J.W., Holme, N.C.R., Müller, U., Pedersen, J.O.P.: Meas. Sci. Tech. (in press)Google Scholar
  31. 31.
    Meijer, H.A.J.: PhD Thesis, University of Utrecht 1988Google Scholar
  32. 32.
    Salgado, J., Dowek, D., Houver, J.C., Richter, C., Saubamea, B., Thomsen, J.W.: J. Phys. B26, L353 (1993)Google Scholar
  33. 33.
    Dubois, A., Hansen, J.P., Lundsgaard, M., Nielsen, S.E.: J. Phys. B24, L269 (1991)Google Scholar
  34. 34.
    Andersen, N., Broad, J.T., Campbell, E.E.B., Gallagher, J.W., Hertel, I.V.: Phys. Rep. (in preparation)Google Scholar
  35. 35.
    Hansen, J.P., Nielsen, S.E., Schweinzer, J.: J. Phys. B26, L471 (1993)Google Scholar
  36. 36.
    Aumayr, F., Lakits, G., Winter, H.: J. Phys. B20, 2025 (1987)Google Scholar
  37. 37.
    Shingal, R., Bransden, B.H.: J. Phys. B20, 4815 (1987)Google Scholar
  38. 38.
    Hoekstra, R., de Heer, F.J., Morgenstern, R.: J. Phys. B24, 4025 (1991)Google Scholar
  39. 39.
    Richter, C., Andersen, N., Dowek, D., Houver, J.C., Salgado, J., Thomsen, J.W.: Z. Phys. D30, 211 (1994)Google Scholar
  40. 40.
    Machholm, M., Lewartowski, E., Courbin, C.: J. Phys. B27, 4681 (1994); Machholm, M., Courbin, C.: J. Phys. B27, 4703 (1994)Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • U. Müller
    • 1
  • H. A. J. Meijer
    • 1
  • N. C. R. Holme
    • 1
  • M. Kmit
    • 1
  • J. H. V. Lauritsen
    • 1
  • J. O. P. Pedersen
    • 1
  • C. Richter
    • 1
  • J. W. Thomsen
    • 1
    • 3
  • N. Andersen
    • 1
  • S. E. Nielsen
    • 2
  1. 1.Niels Bohr Institute, Ørsted LaboratoryUniversity of CopenhagenCopenhagenDenmark
  2. 2.Department of Chemistry, H.C. Ørsted InstituteUniversity of CopenhagenCopenhagenDenmark
  3. 3.Laboratoire des Collisions Atomiques et Moléculaires, Bât. 351Université de Paris-SudOrsay CedexFrance

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