Nonadiabatic Effects on the Dynamics of the NeICl Van der Waals Complex

  • Thomas A. Stephenson
  • Yujian Hong
  • Marsha I. Lester
Part of the NATO ASI Series book series (NSSB, volume 227)


Electronic state changing processes have been directly observed in the dissociation of NeIC1 complexes excited to a high-lying ion-pair state of ICl (~ 39,000 cm−1). The complex is prepared in the ion-pair state by an optical-optical double resonance technique through a long-lived intermediate level in the A electronic state. Following excitation of the complex, dispersed fluorescence has been detected on the E → X and D’ → A’ transitions, indicating the presence of nonadiabatic interactions in the complex that are absent in uncomplexed ICI. Vibrational predissociation with a strong propensity for ΔvIC1 = −1 relaxation has also been observed. The electronic state changing pathways are found to be sensitive to both the initial ICl vibrational level of the NeIC1 complex as well as the degree of excitation of the Van der Waals vibrational modes.


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  1. 1.
    D.H. Levy, Adv. Chem. Phys. 47: 323 (1981).Google Scholar
  2. 2.
    K.C. Janda, Adv. Chem. Phys. 60: 201 (1985).Google Scholar
  3. 3.
    D.D. Evard, C. R. Bieler, J.I. Cline, N. Sivakumar, and K.C. Janda,J. Chem. Phys. 89:2829 (1988) and references cited therein.Google Scholar
  4. 4.
    J.I. Cline, B.P. Reid, D.D. Evard, N. Sivakumar, N. Halberstadt, and K.C. Janda, L. Chem. Phys. 89: 3535 (1988).ADSCrossRefGoogle Scholar
  5. 5.
    N. Sivakumar, J.I. Cline, C.R. Bieler, and K.C. Janda,Chem. Phys. Lett. 147:561 (1988) and references cited therein.Google Scholar
  6. 6.
    J.C. Drobits and M.I. Lester,J. Chem. Phys. 89:4716 (1988) amd references cited therein.Google Scholar
  7. 7.
    R.L. Waterland, J.M. Skene, and M.I. Lester, J. Chem. Phys. 89:7277(1988) and references cited therein.Google Scholar
  8. 8.
    J.C. Drobits and M.I. Lester, J. Chem. Phys. 86: 1662 (1987).ADSCrossRefGoogle Scholar
  9. 9.
    G. Kubiak, P.S.H. Fitch, L. Wharton, and D.H. Levy, J. Chem. Phys. 68: 4477 (1978).ADSGoogle Scholar
  10. 10.
    J.M. Skene and M.I. Lester, Chem. Phys. Lett. 116: 93 (1985).ADSCrossRefGoogle Scholar
  11. 11.
    J.A. Beswick, R. Monot, J.-M. Philippoz, and H. van den Bergh, J. Chem. Phys. 86: 3965 (1987).ADSGoogle Scholar
  12. 12.
    C. Jouvet and B. Soep, J. Chem. Phys. 80: 2229 (1984).ADSCrossRefGoogle Scholar
  13. J.C. Drobits, J.M. Skene, and M.I. Lester,J. Chem. Phys.84:2896 (1986).Google Scholar
  14. 14.
    J.M. Skene, Ph.D. thesis, University of Pennsylvania, 1988.Google Scholar
  15. 15.
    T.A. Stephenson, Y. Hong and M.I. Lester, Chem. Phys. Lett. 159: 549 (1989).ADSCrossRefGoogle Scholar
  16. 16.
    J.C.D. Brand and A. R. Hoy, J. Mol. Spectrosc. 114: 197 (1985).ADSCrossRefGoogle Scholar
  17. 17.
    J.A. Coxon and M.A. Wickramaaratchi, J. Mol. Spectrosc. 79: 380 (1980).ADSCrossRefGoogle Scholar
  18. 18.
    J.C.D. Brand, D. Bussières, and A.R. Hoy, J. Mol. Spectrosc. 113: 388 (1985).ADSCrossRefGoogle Scholar
  19. 19.
    D. Bussières and A.R. Hoy, Can J. Phys. 62: 1941 (1984).ADSCrossRefGoogle Scholar
  20. 20.
    J.G. Eden, M.L. Dlabal, and S.B. Hutchison, IEEE J Quant. Elec. 17: 1085 (1981).ADSCrossRefGoogle Scholar
  21. 21.
    C. Jouvet and J.A. Beswick, J. Chem. Phys. 86: 5500 (1987).ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • Thomas A. Stephenson
    • 1
    • 2
  • Yujian Hong
    • 1
  • Marsha I. Lester
    • 1
  1. 1.Department of ChemistryUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.Department of ChemistrySwarthmore CollegeSwarthmoreUSA

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