Supersonic Molecular Beams and van der Waals Molecules

  • Donald H. Levy
Part of the NATO Advanced Study Institutes Series book series (volume 57)


These lecture notes will concern themselves with van der Waals molecules, molecules that are bound in part by forces that are two or three orders of magnitude weaker than the forces responsible for ordinary chemical bonds. The interest in these species arises in part from a desire to understand the van der Waals forces themselves and in part from the fact that knowledge of the structura. and dynamic features of these molecules may shed some light on analogous features in more complicated chemically bound molecules.


Mach Number Quantum Channel Mach Disc Fluorescence Excitation Spectrum Storage Mode 


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  1. Anderson, J.B., and Fenn, J.B., 1965, Velocity distributions in molecular beams from nozzle sources, Phys. Fluids, 8: 780.ADSCrossRefGoogle Scholar
  2. Ashkenhas, H. and Sherman, F.S., 1966, The structure and utilisation of supersonic free jets in low density wind tunnels, in “Rarefied Gas Dynamics”, Fourth Symposium, Vol.11, J.H. de Leeuw, ed., Academic Press, New York.Google Scholar
  3. Beswick, J.A., Delgado-Barrio, G. and Jortner, J., 1979, Vibrational predissociation lifetime of the van der Waals molecule HeI2, J.Chem.Phys., 70: 3895.ADSCrossRefGoogle Scholar
  4. Beswick, J.A. and Jortner, J., 1977, Model for vibrational predissociation of van der Waals molecules, Chem.Phys.Lett., 49: 13.ADSCrossRefGoogle Scholar
  5. Beswick, J.A. and Jortner, J., Vibrational predissociation of triatomic van der Waals molecules, J.Chem.Phys., 68: 2277, 2525.CrossRefGoogle Scholar
  6. Bier, K. and Hagena, O., 1966, in “Rarefied Gas Dynamics”, Fourth Symposium, Vol.11: 260, Academic Press, New York.Google Scholar
  7. Blazy, J.A., DeKoven, B.M., Russell, T., and Levy, D.H., The Binding Energy to Iodine-Rare Gas van der Waals molecules, J. Chem. Phys. 72, in press.Google Scholar
  8. Campargue, R., 1964, High intensity supersonic molecular beam apparatus, Rev. Sci.Instr., 35: 111.ADSCrossRefGoogle Scholar
  9. Campargue, R., 1970, Aerodynamic separation effect on gas and isotope mixtures induced by invasion of the free jet shock wave structure, J.Chem.Phys., 52: 1795.ADSCrossRefGoogle Scholar
  10. Campargue, R., 1970, Etude, par simple et double extraction de jets supersoniques purs ou dopes, des effets intervenant dans la formation d’un faisceau moleculaire de haute intensité et d’energie comprise entra 0 et 25 eV, Ph.D. Thesis, University of Paris.Google Scholar
  11. Campargue, R., Lebehot, A., Lemonnier, J.C., Marette, D. and Pebay, J., 1975, Generateur de jet moleculaire supersonique functionant en monochromateur dans le domaine de 10-2 à 40 eV, in Abstracts of Vth Symposium International sur Jets Moleculaires, Nice.Google Scholar
  12. Gentry, W.R. and Giese, C.F., 1975, High precision skimmers for supersonic molecular beams, Rev.Sci.Instr., 46: 104.ADSCrossRefGoogle Scholar
  13. Gentry, W.R. and Giese, C.F., 1978, Ten-microsecond pulsed molecular beam source and a fast ionization detector, Rev.Sci.Instr., 49: 595.ADSCrossRefGoogle Scholar
  14. Herzberg, G., 1966, “Molecular Spectra and Molecular Structure”, Vol.3: 469, Van Nostrand, New York.Google Scholar
  15. Johnson, K.E., Wharton, L. and Levy, D.H., 1978. The photodissociation lifetime of the van der Waals molecule I2He, J.Chem.Phys., 69: 2719.ADSCrossRefGoogle Scholar
  16. Kenny, J.E., Johnson, K.E., Sharfin, W.F. and Levy D.H., The photo-dissociation of van der Waals molecules: complexes of iodine, neon and helium, J. Chem. Phys. 72, in press, January 15, 1980.Google Scholar
  17. Kubiak, G., Fitch, P.S.H., Wharton, L. and Levy, D.H., 1978, The fluorescence excitation spectrum of the ArI2 van der Waals complex, J.Chem.Phys., 68: 4477.ADSCrossRefGoogle Scholar
  18. Liepmann, H.W. and Roshko, A., 1957, “Elements of Gas Dynamics”, Wiley, New York.Google Scholar
  19. Liverman, M.G., Beck, S.M., Monts, D.L. and Smalley, R.E., 1979, Fluorescence excitation spectrum of the lAu(nΠ*) ← lAg(O–O) band of oxalyl fluoride in a pulsed supersonic free jet, J.Chem.Phys., 70: 192.ADSCrossRefGoogle Scholar
  20. Miller, D.R., Toennies, J.P. and Winkelmann, K., 1974, Quantum effects in highly expanded helium nozzle beams, in “XIth Symposium of Rarefied Gas Dynamics”, M. Becker and M. Fiebig, eds., DFVLR Press, Porz-Wahn.Google Scholar
  21. Ramsey, N.F., 1963, “Molecular Beams”, Clarendon Press, Oxford.Google Scholar
  22. Rothe, D.E., 1966, Electron beam studies of the diffusive separation of helium-argon mixtures, Phys. Fluids, 9: 1643.ADSCrossRefGoogle Scholar
  23. Sharfin, W., Johnson, K.E., Wharton, L., and Levy, D.H., 1979, Energy distribution in the photodissociation products of van der Waals molecules: iodine-helium complexes, J.Chem.Phys., 71, 1292 (1979).ADSCrossRefGoogle Scholar
  24. Smalley, R.E., Wharton, L. and Levy, D.H., 1978, The structure of the He I2 van der Waals molecule, J.Chem.Phys., 68: 671.ADSCrossRefGoogle Scholar
  25. Tellinghuisen, J., 1978, Intensity factors for the I2 B↔X band system, J.Quant. Spec.Rad.Trans., 19: 149.ADSCrossRefGoogle Scholar
  26. Toennies, J.P. and Winkelmann, K., 1977, Theoretical studies of highly expanded free jets: influence of quantum effects and a realistic intermolecular potential, J.Chem.Phys., 66: 3965.ADSCrossRefGoogle Scholar
  27. Wei, J. and Tellinghuisen, J., 1974, Parameterizing diatomic spectra: “best” spectroscopic constants for the I2 B↔X transition, J.Mol.Spectry., 50: 317.ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Donald H. Levy
    • 1
  1. 1.The James Franck Institute and The Department of ChemistryThe University of ChicagoChicagoUSA

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