Free sodium-water clusters: photoionisation studies in a pulsed molecular beam source

  • C. P. Schulz
  • R. Haugstätter
  • H. -U. Tittes
  • I. V. Hertel
Article

Abstract

Neutral Na·(H2O)n clusters are studied by near-uv one-photon ionisation and time-of-flight mass spectroscopy. The clusters are formed in a “pickup source” by injection of a beam of Na atoms into the expansion zone of a pulsed nozzle beam of water vapour seeded into an argon carrier gas. The performance of this novel technique for studying cold aggregates of potentially reactive species is discussed in detail. The photoion efficiency (PIE) spectrum of the monomer near its ionisation threshold (4.379(2) eV) shows a rich structure. Vibrational frequencies of the ion can be deduced and some indication of molecular Rydberg states is seen. Ionisation potentials for larger clusters and the binding energies of the neutral clusters up ton=5 are reported.

PACS

36.40.+d 33.80.Eh 82.30.Nr 82.40.Dm 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Schulz, C.P., Haugstätter, R., Tittes, H.-U., Hertel, I.V.: Phys. Rev. Lett.14, 1703 (1986)Google Scholar
  2. 2.
    Kistenmacher, H., Popkie, H., Clementi, E.: J. Chem. Phys.58, 1689 (1973)Google Scholar
  3. 3.
    Kistenmacher, H., Popkie, H., Clementi, E.: J. Chem. Phys.59, 5842 (1973)Google Scholar
  4. 4.
    Lybrand, T.P., Kollman, P.A.: J. Chem. Phys.83, 2923 (1985)Google Scholar
  5. 5.
    Trenary, M., Schaefer, H.F. III, Kollman, P.: J. Am. Chem. Soc.99, 3885 (1977)Google Scholar
  6. 6.
    Bentley, J., Carmichael, I.: J. Chem. Phys.85, 3821 (1981)Google Scholar
  7. 7.
    Bentley, J.: J. Am. Chem. Soc.104, 2754 (1982)Google Scholar
  8. 8.
    Curtiss, L.A., Kraka, E., Gauss, J., Cremer, D.: J. Phys. Chem.91, 1080 (1987)Google Scholar
  9. 9.
    Kestner, N.R., Dhar, S.: In: Large finite systems. Proceedings of the 20th Jerusalem Symposium on Quantum Chemistry and Biochemistry. Jortner, J., Pullmann, A., Pullmann, B. (eds.), p. 209. Dordrecht, Boston, Lancaster: D. Reidel 1987; Dhar, S., Kestner, N.R.: Radiat. Phys. Chem. (1988) (in press)Google Scholar
  10. 10.
    Dzidic, I., Kebarle, P.: J. Phys. Chem.74, 1466 (1970)Google Scholar
  11. 11.
    Märk, T.D., Castleman, A.W., Jr.: Adv. Atom. Mol. Phys.20, 65 (1985)Google Scholar
  12. 12.
    Meot-Ner, M., Speller, Carlos V.: J. Phys. Chem.90, 6616 (1986)Google Scholar
  13. 13.
    Shen, M.H., Winniczeck, J.W., Farrar, J.M.: J. Am. Chem. Soc.91, 6447 (1987)Google Scholar
  14. 14.
    Manceron, L., Loutellier, A., Perchard, J.P.: Chem. Phys.92, 75 (1985)Google Scholar
  15. 15.
    Wiley, W.C., McLaren, I.H.: Rev. Sci. Instrum.26, 1150 (1955)Google Scholar
  16. 16.
    Hofman-Sievert, R., Castleman, A.W., Jr.: J. Phys. Chem.88, 3329 (1984)Google Scholar
  17. 17.
    Peterson, K.I., Dao, P.D., Castleman, A.W., Jr.: J. Chem. Phys.79, 777 (1983)Google Scholar
  18. 18.
    Gough, T.E., Mengel, M., Rowntree, P.A., Scoles, G.: J. Chem. Phys.83, 4958 (1985)Google Scholar
  19. 19.
    Tittes, H.-U.: Dissertation, Freie Universität Berlin (1986)Google Scholar
  20. 20.
    Tomoda, S., Kimura, K.: Chem. Phys. Lett.102, 560 (1983)Google Scholar
  21. 21.
    Wicke, E., Eigen, M., Ackermann, T.: Z. Phys. Chem. N.F.1, 340 (1954)Google Scholar
  22. 22.
    Castleman, A.W., Jr., Dao, P.D., Echt, O., Morgan, S., Breen, J.J., Kilgore, K., Keesee, R.G.: Surf. Sci.156, 469 (1985)Google Scholar
  23. 23.
    Freund, R.S.: Rydberg states of atoms and molecules. Stebbings, R.F., Dunning, F.B. (eds.) p. 355 (1983)Google Scholar
  24. 24.
    Wiesenfeld, J.M., Greene, B.I.: Phys. Lett.51, 1745 (1983)Google Scholar
  25. 25.
    Radzig, A.A., Smirnov, B.M.: Reference data on atoms, molecules, and ions. Springer Series in Chemical Physics 31. Berlin, Heidelberg, New York: Springer 1985Google Scholar
  26. 26.
    Abraham, F.F., Mruzik, M.R., Pound, G.M.: Faraday Disc. Chem. Soc.61, 34 (1976)Google Scholar
  27. 27.
    Schulz, C.-P.: Dissertation, Freie Universität Berlin (1987)Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • C. P. Schulz
    • 1
  • R. Haugstätter
    • 1
  • H. -U. Tittes
    • 1
  • I. V. Hertel
    • 1
  1. 1.Sonderforschungsbereich 337 der Freien Universität Berlin and Fakultät für Physik der Universität FreiburgFreiburgFederal Republic of Germany

Personalised recommendations