Advertisement

The European Physical Journal Special Topics

, Volume 222, Issue 9, pp 2293–2300 | Cite as

Charge distribution of He states, excited by electron capture in He+ (26 keV)-He collisions

  • P. Kamiński
  • R. Drozdowski
  • G. von Oppen
Regular Article
  • 67 Downloads

Abstract

Using anticrossing spectroscopy we investigated one-electron capture in He+ (26 keV) – He collisions. The intensity of the triplet line λ (1s4l 3D → 1s2p 3P) ≈ 447.2 nm emitted by the fast atoms was measured as a function of an external electric field in the collision volume varied from −30 kV/cm to +30 kV/cm. The radiative decay of excited He atoms in an almost field-free region outside the collision volume was observed. The highly asymmetric intensity function could be reproduced theoretically using the density-matrix formalism. It indicates that the excited He atoms are in a state with a highly forward-backward asymmetric charge distribution, immediately after the charge-exchange collision.

Keywords

European Physical Journal Special Topic Intensity Function Electric Dipole Moment Helium Atom Excitation Cross Section 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. von Oppen, Europhys. Lett. 27, 279 (1994)ADSCrossRefGoogle Scholar
  2. 2.
    G. von Oppen, M. Tschersich, R. Drozdowski, M. Busch, Aust. J. Phys. 52, 431 (1999)ADSCrossRefGoogle Scholar
  3. 3.
    M. Busch, R. Drozdowski, Th. Ludwig, G. von Oppen, J. Phys. B: At. Mol. Opt. Phys. 36, 4849 (2003)ADSCrossRefGoogle Scholar
  4. 4.
    J.M. Rost, J.J. Briggs, J. Phys. B: At. Mol. Opt. Phys. 24, 4293 (1991)ADSCrossRefGoogle Scholar
  5. 5.
    G. von Oppen, M. Busch, R. Drozdowski, AIP Conf. Proc. 604, Rolla, MO, USA, edited by D.H. Madison and M. Schulz (2002), p. 256Google Scholar
  6. 6.
    R.E. Olson, T.J. Gay, Phys. Rev. Lett. 59, 36 (1987)ADSCrossRefGoogle Scholar
  7. 7.
    R. Dörner, H. Khemliche, M.N. Prior, C.L. Cocke, J.A. Gary, R.E. Olson, V. Mergel, J. Ullrich, H. Schmidt-Böcking, J. Phys. B: At. Mol.. Opt. Phys. 77, 4520 (1996)Google Scholar
  8. 8.
    F. Afanach, R. Dörner, L. Schmidt, Th. Weber, K.E. Stiebing, O. Jagutzki, H. Schmidt-Böcking, J. Phys. B: At. Mol. Opt. Phys. 35, L229 (2002)ADSCrossRefGoogle Scholar
  9. 9.
    V.P. Shevelko, D. Kato, M.-Y. Song, H. Tawara, I.Yu. Tolstikhina, J.-S. Yoon, Nucl. Instrum. Methods B 267, 3395 (2009)ADSCrossRefGoogle Scholar
  10. 10.
    E.B. Aleksandrov, Soviet Phys. Uspekhi 15, 436 (1973)ADSCrossRefGoogle Scholar
  11. 11.
    G. von Oppen, M. Busch, T. Ludwig, R. Drozdowski, The IVth Workshop on Atomic, Molecular Physics, Optics, Jurata 2002, SPIE Proc. 5258, 1 (2003)ADSCrossRefGoogle Scholar
  12. 12.
    G. von Oppen, R. Drozdowski, M. Busch, Th. Ludwig, The Vth Workshop on Atomic, Molecular Physics, Optics, Jurata 2004, SPIE Proc. 5849, 1 (2005)ADSCrossRefGoogle Scholar
  13. 13.
    M. Busch, Th. Ludwig, R. Drozdowski, G. von Oppen, J. Phys. B: At. Mol. Opt. Phys. 39, 1929 (2006)ADSCrossRefGoogle Scholar
  14. 14.
    M. Busch, R. Drozdowski, Th. Ludwig, G. von Oppen, J. Phys. B: At. Mol. Opt. 37, 2903 (2004)ADSCrossRefGoogle Scholar
  15. 15.
    E. Baszanowska, R. Drozdowski, P. Kamiński, G. von Oppen, J. Phys B: At. Mol. Phys. 45, 115203 (2012)ADSCrossRefGoogle Scholar
  16. 16.
    K. Blum, Density Matrix Theory and Application (Plenum Press, New York, 1981)Google Scholar
  17. 17.
    R. Drozdowski, Eur. Phys. J. D. 23, 73 (2003)ADSCrossRefGoogle Scholar
  18. 18.
    C.E. Head, R.H. Hughes, Phys. Rev. 139, 1392 (1965)ADSCrossRefGoogle Scholar
  19. 19.
    L. Wolterbeek Muller, F.J. de Heer, Physica 48, 345 (1970)ADSCrossRefGoogle Scholar
  20. 20.
    F.J. de Heer, Physica 31, 1745 (1965)ADSCrossRefGoogle Scholar
  21. 21.
    D.R. Cok, S.R. Lundeen, Phys. Rev. A 19, 1830 (1979)ADSCrossRefGoogle Scholar
  22. 22.
    D.R. Cok, S.R. Lundeen, Phys. Rev. A 36, 3283 (1981)ADSCrossRefGoogle Scholar
  23. 23.
    L. Windholz, E. Winklhofer, R. Drozdowski, J. Kwela, T.J. Wasowicz, Phys. Scr. 78, 065303 (2008)ADSCrossRefGoogle Scholar
  24. 24.
    L. Windholz, T.J. Wasowicz, R. Drozdowski, J. Kwela, J. Opt. Soc. Am. B 29, 934 (2012)ADSCrossRefGoogle Scholar
  25. 25.
    H. Bethe, E. Salpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer, Berlin, 1957)Google Scholar
  26. 26.
    R. Drozdowski, M. Thuy, M. Tschersich, B. Skogvall, G. von Oppen, J. Phys. B: At. Mol. Opt. Phys. 32, 397 (1999)ADSCrossRefGoogle Scholar
  27. 27.
    M. Tschersich, R. Drozdowski, M. Busch, B. Skogvall, G. von Oppen, J. Phys. B: At. Mol. Opt. Phys. 32, 5539 (1999)ADSCrossRefGoogle Scholar
  28. 28.
    Thorsten Ludwig thesis D86, Technische Universität Berlin, 2005Google Scholar
  29. 29.
    J. Witt, Diplomarbeit, Technische Universität Berlin, 2002 (unpublished)Google Scholar
  30. 30.
    A. Kochan, Diplomarbeit, Technische Universität Berlin, 2006 (unpublished)Google Scholar
  31. 31.
    D. Weissbach, Diplomarbeit, Technische Universität Berlin, 2006 (unpublished)Google Scholar

Copyright information

© EDP Sciences and Springer 2013

Authors and Affiliations

  • P. Kamiński
    • 1
  • R. Drozdowski
    • 1
  • G. von Oppen
    • 2
  1. 1.Institute of Experimental PhysicsUniversity of GdańskGdańskPoland
  2. 2.Institüt für Optik und atomare PhysikTechnische Universität BerlinBerlinGermany

Personalised recommendations