Doppler Free Excitation of Large Molecules and Nonradiative Decay of Individual Levels

  • E. Riedle
  • H. J. Neusser
Part of the NATO ASI Series book series (ASIC, volume 200)


Doppler-free two-photon spectroscopy with cw and pulsed Fourier transform limited light sources allows the resolution of the rotational structure of the electronic spectrum of large molecules. Besides a very detailed analysis of the spectrum and a precise determination of spectroscopic constants, the observation of the decay behavior of individual levels is made possible in this way. Examples are presented for the prototype molecule benzene, C6H6. While regular behavior prevails in the 141 0-band at low vibrational excess energy, it is shown that strong coupling to background states occurs in the 141 011 0- band at intermediate excess energy. A detailed model for this coupling is presented.


Large Molecule Vibrational State Nonradiative Decay Rotational Line Decay Behavior 
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  1. 1.
    For a review see, K. F. Freed in: Topics in Applied Physics, ed. F. K. Fong, Vol. 15, p. 23 f f., Springer, Berlin, 1976Google Scholar
  2. 2.
    J. H. Callomon, J. E. Parkin, and R. Lope z-Delgado, Chem. Pys. Lett. 13, 1 25 (1972)ADSCrossRefGoogle Scholar
  3. 3.
    L. Wunsch, H. J. Neusser, and E. W. Schlag, Z. Naturforsch. Teil A 36, 1340 (1981)Google Scholar
  4. 4.
    Compare for example: K. G. Spears and S. A. Rice, J. Chem. Phys. 55, 5561 (1971); L. Wunsch, H. J. Neusser, and E. W. Schlag, Chem. Phys. Lett. 32, 210 (1975);M. Sumitani, D. V. O’Connor, Y. Takagi, N. Nakashima, A. Kamagawa, Y. Udagawa, and K. Yoshihara, Chem. Phys. 93, 359 (1985)CrossRefGoogle Scholar
  5. 5.
    B. E. Forch, K. T. Chen, H. Saigusa, and E. C. Lim, J. Phys. Chem. 87, 2280 (1983); P. M. Felker and A. H. Zewail, J. Chem. Phys. 82, 2994 (1985); A. Amirav and J. Jortner, J. Chem. Phys. 84, 1500 (1986)CrossRefGoogle Scholar
  6. 6.
    For a review see, W. Demtröder, “Laser Spectroscopy”, Springer, Berlin, 1981Google Scholar
  7. 7.
    E. Riedle, H. J. Neusser, and E. W. Schlag, J. Chem. Phys. 75, 4231 (1981); K. H. Fung and D. A. Ramsay, J. Phys. Chem. 88, 395 (1984); A. Kiermeier, K. Dietrich, E. Riedle, and H. J. Neusser, J. Chem. Ph ys., in pr essADSCrossRefGoogle Scholar
  8. 8.
    E. Riedle and H. J. Neusser, J. Chem. Phys. 80, 4686 (1984)ADSCrossRefGoogle Scholar
  9. 9.
    U. Schubert, E. Riedle, and H. J. Neusser, J. Chem. Phys. 84, 5326 (1986)ADSCrossRefGoogle Scholar
  10. 10.
    L. S. Vasilenko, V. P. Chebotayev, and A. V. Shishaev, JE TP Letters 12, 113 (1970)ADSGoogle Scholar
  11. 11.
    E. Riedle, R. Moder, and H. J. Neusser, Opt. Commun. 43, 388 (1982)ADSCrossRefGoogle Scholar
  12. 12.
    U. Schubert, E. Riedle, H. J. Neusser, and E. W. Schlag, J. Chem. Phys. 84, 61 82 (1986)ADSCrossRefGoogle Scholar
  13. 13.
    E. Riedle and H. J. Neusser, in preparationGoogle Scholar
  14. 14.
    E. Riedle, H. Stepp, and H. J. Neusser, Chem. Phys. Lett. 110, 452 (1984)ADSGoogle Scholar
  15. 15.
    For a review see, C. S. Parmenter, Adv. Chem. Phys. 22, 365 (1972)CrossRefGoogle Scholar
  16. 16.
    E. Riedle, H. J. Neusser, and E. W. Schlag, J. Phys. Chem. 86, 484 7 (1982)CrossRefGoogle Scholar
  17. 17.
    A. Nitzan, J. Jortner, and P. M. Rentzepis, Proc. R. Soc. London Ser. A 327, 367 (1972); F. Lahmani, A. Tramer, and C. Trie, J. Chem. Phys. 60, 4431 (1974)ADSCrossRefGoogle Scholar
  18. 18.
    H. Hornburger and J. Brand, Chem. Phys. Lett. 88, 153 (1982)ADSCrossRefGoogle Scholar
  19. 19.
    I. M. Mills, Pure Appl. Chem. 1, 325 (1965)CrossRefGoogle Scholar
  20. 20.
    Compare for example recent measurements by our group, for which a theoretical interpretation is presented by S. F. Fischer and W. Dietz in this volumeGoogle Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1987

Authors and Affiliations

  • E. Riedle
    • 1
  • H. J. Neusser
    • 1
  1. 1.Institut für Physikalische und Theoretische Chemie Technisehe Universität MünchenGarchingWest Germany

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