Atomic Autoionization Observed in nd → O* Molecular Resonances

  • P. Morin
Part of the NATO ASI Series book series (NSSB, volume 151)


The excitation of a core electron into an antibonding empty valence orbital of a molecule leads to a quite intense resonance compared to Rydberg transitions in the photoabsorption spectrum. We show the direct experimental evidence of its repulsive character by photoelectron spectroscopy in the case of a d-shell excitation of halogen compounds such as HBr, CH3 Br, HI and CH3 I. The first step of the resonance decay is a very fast dissociation process followed by autoionization of the core excited fragment as a second step. Competition with usual molecular autoionization is found when the mass of the radical linked to the excited atom is increased.


Photon Energy Rydberg State Giant Resonance Electronic Relaxation Electron Energy Loss Spectrum 
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  1. 1.
    F. Keller and H, Lefebvre-Brion, Zeischrift für Physik D, in pressGoogle Scholar
  2. 2.
    -Molecular type: see for ex. A.P. Hitchcock and C.E. Brion J. El. Spec. 13 (1978) 193CrossRefGoogle Scholar
  3. -Atomic type: F.J. Comes, U. Nielsen and W.H.E. Schwarz J. Chem. Phys. 58 (1973) 2230CrossRefGoogle Scholar
  4. G. O’Sullivan, J. Phys. B 15 (1982) L327CrossRefGoogle Scholar
  5. 3.
    see for ex. M. Ben Amar and F. Combet-Farnoux J. Phys. B 16 (1983) 2339CrossRefGoogle Scholar
  6. 4.
    P. Morin, M.Y. Adam, I. Nenner, S., Delwiche, M.J. Hubinfranskin and P. Lablanquie, Nucl. Inst. Meth. 208 (1983) 761CrossRefGoogle Scholar
  7. 5.
    P. Lablanquie Thèse 3ème cycle ORSAY (1984)Google Scholar
  8. 6.
    J. Delwiche, P. Natalis, J. Momigny And J.E. Colin J. El. Spec, 1 (72/73) 219Google Scholar
  9. W. von Niessen. L. Asbrink And G. Bierri J. El. Spec. 26, (1982) 173CrossRefGoogle Scholar
  10. 7.
    P. Morin And I. Nenner Phys. Rev. Lett. 56, (1986) 1913CrossRefGoogle Scholar
  11. 8.
    V. Cermak, J. El. Spec. 3 (1974) 329CrossRefGoogle Scholar
  12. 9.
    P. Morin, M. Simon, P. Lablanquie And I. Nenner (to be published)Google Scholar
  13. 10.
    M. Mazzoni And P. Pettini, Phys. Lett. 85A (1981) 331CrossRefGoogle Scholar
  14. 11.
    G.G.B de Souza, P. Morin And I. Nenner submitted to Phys. Rev. A (1986)Google Scholar
  15. 12.
    P. Morin (to be published)Google Scholar
  16. 13.
    D.A. Shaw, D.C. Cvejanovic, G.C. King and F.H. Read J.Phys.B 17 (1984) 1173CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1987

Authors and Affiliations

  • P. Morin
    • 1
    • 2
  1. 1.LURE Laboratoire commun CNRSCEA et MEN Université de Paris SudOrsay CedexFrance
  2. 2.Département de PhysicochimieCEA, CEN SaclayGIF SUR Yvette CedexFrance

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