Laser Spectroscopy and Predissociation of Molecules

  • J. C. Lehmann


Predissociation is a process in which a molecule in an excited state e can be transferred into a dissociative state of the same energy. Figure 1 shows a typical situation for a diatomic molecule, e is a rovibronic state labeled by its vibrational and rotational quantum numbers v and J. It belongs to an electronic excited state E. From E, the molecule can either go back to a lower electronic state G by spontaneous emission of radiation or be transferred to the dissociative state D by an internal or an externally induced coupling.
Figure 1

— Predissociation and fluorescence

To a large extent predissociation is therefore comparable to an atomic autoionization process and many conclusions that will be given in this paper can be applied to autoionization.


Nuclear Spin Diatomic Molecule Laser Spectroscopy Lifetime Measurement Rotational Quantum Number 
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  1. (1).
    see for example G. Herzberg, “Spectra of diatomic molecules” p. 405 — D. Van Nostrand Company.Google Scholar
  2. (2).
    P. Erman — Proc. of the 4th Int. Beam Foil Conf., Gatlinburg, USA, Sept. 1975.Google Scholar
  3. (3).
    M. Broyer, J. Vigue and J.C. Lehmann — J. Chem. Phys. 63, 5428 (1975).ADSCrossRefGoogle Scholar
  4. (4).
    L. Brewer and J. Tellinghuisen — J. Chem. Phys. 56., 3929 (1972).ADSCrossRefGoogle Scholar
  5. (5).
    A. Chutjian — J. Chem. Phys. 51, 5414 (1969). J. Tellinghuisen — J. Chem. Phys. 57, 2397 (1972). J. Vigue, M. Broyer and J.C. Lehmann — J. Chem. Phys. 62, 4 941 (1975).ADSCrossRefGoogle Scholar
  6. (6).
    M. Broyer, J. Vigue and J.C. Lehmann — J. Chem. Phys. 64, 4793 (1976).ADSCrossRefGoogle Scholar
  7. (7).
    W. Steubing — Verhandl d. Deutsch. Phys. Ges. 1181 (1913). R.W. Wood and G. Ribaud — Phil. Mag. 27,1009 (1914).Google Scholar
  8. (8).
    M.A. Bouchiat and L. Pottier — J. de Phys. 37, 279 (1976).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • J. C. Lehmann
    • 1
  1. 1.Laboratoire de Spectroscopie Hertzienne de l’Ecole Normale SupérieureParis cedex 05France

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