Advertisement

Investigation of the stabilities of neutral and ionic lead and lead-antimony clusters under single and multiphoton ionization conditions

  • R. W. Farley
  • P. Ziemann
  • A. W. CastlemanJr.
Article

Abstract

The fluence dependence of lead cluster ion distributions at 222 nm and 308 nm reveal markedly different behavior. Results obtained at 308 nm display a simple uniform increase in intensity with higher laser fluence with little change in relative intensities. At 222 nm, however, a significant transformation is found from a markedly different low fluence distribution to a high fluence pattern, which is essentially indistinguishable from that observed at 308 nm. It is concluded that mass spectra obtained at 308 nm, regardless of fluence, or at 222 nm and high fluence contain appreciable contributions from fragmentation. Hence, under these conditions the mass spectra are found to be dominated by cluster ion stabilities. Magic numbers observed at both high and low fluence correspond well to those obtained using electron-impact ionization, and in many instances parallel the magic numbers characteristic of rare-gas clusters. This suggests the stabilities of both neutral and monovalent cationic lead clusters are largely determined by close-packing considerations, and are not appreciably influenced by electronic structure. Similar preferences for close-packed structures are also found for mixed lead-antimony clusters containing one or two antimony atoms that are ionized using high fluence 308 nm excitation.

PACS

36.40 33.80 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Kappes, M.M., Schär, M., Schumacher, E.: J. Phys. Chem.91, 658 (1987)Google Scholar
  2. 2.
    Kappes, M.M., Schär, M., Schumacher, E., Vayloyan, A.: Z. Phys. D — Atoms, Molecules and Clusters5, 359 (1987)Google Scholar
  3. 3.
    Bréchignac, C., Cahuzac, Ph., Pflaum, R., Roux, J.Ph.: J. Chem. Phys.88, 3732 (1988)Google Scholar
  4. 4.
    Bréchignac, C., Bréchignac, Ph., Fayet, P., Saunders, W.A., Wöste, L.: J. Chem. Phys.89, 2419 (1988)Google Scholar
  5. 5.
    Brucat, P.J., Zheng, L.-S., Pettiette, C.L., Yang, S., Smalley, R.E.: J. Chem. Phys.84, 3078 (1986)Google Scholar
  6. 6.
    Herrmann, A., Hofmann, M., Leutwyler, S., Schumacher, E., Wöste, L.: Chem. Phys. Lett.62, 216 (1979)Google Scholar
  7. 7.
    Morse, M.D., Hopkins, J.B., Landridge-Smith, P.R.R., Smalley, R.E.: J. Chem. Phys.79, 5316 (1983)Google Scholar
  8. 8.
    Rholfing, E.A., Cox, D.M., Kaldor, A.: J. Chem. Phys.88, 4497 (1984)Google Scholar
  9. 9.
    Leopold, D.G., Ho, J., Lineberger, W.C.: J. Chem. Phys.86, 1715 (1987)Google Scholar
  10. 10.
    Sattler, K., Mülbach, J., Echt, O., Pfau, P., Recknagel, E.: Phys. Rev. Lett.47, 160 (1981)Google Scholar
  11. 11.
    Goldenfeld, I., Franck, F., Schulze, W., Winter, B.: Int. J. Mass Spectrom. Ion Proc.71, 103 (1986)Google Scholar
  12. 12.
    LaiHing, K., Wheeler, R.G., Wilson, W.L., Duncan, M.A.: J. Chem. Phys.87, 3401 (1987)Google Scholar
  13. 13.
    Wheeler, R.G., LaiHing, K., Wilson, W.L., Duncan, M.A.: J. Chem. Phys.88, 2831 (1988)Google Scholar
  14. 14.
    Sattler, K.: Z. Phys. D — Atoms, Molecules and Clusters3, 223 (1986)Google Scholar
  15. 15.
    Corbett, J.D.: Chem. Rev.85, 383 (1985)Google Scholar
  16. 16.
    Schulze, W., Frank, F., Charlé, K.-P., Tesche, B.: Ber. Bunsenges. Phys. Chem.88, 263 (1984)Google Scholar
  17. 17.
    Frank, F., Schulze, W., Tesche, B., Urban, J., Winter, B.: Surf. Sci.156, 90 (1985)Google Scholar
  18. 18.
    Hayashi, C.: Physics Today40, 44 (1987)Google Scholar
  19. 19.
    Echt, O., Sattler, K., Recknagel, E.: Phys. Rev. Lett.47, 1121 (1981)Google Scholar
  20. 20.
    Saito, Y., Yamauchi, K., Mihama, K., Noda, T: Jpn. J. Appl. Phys.21, L396 (1982)Google Scholar
  21. 21.
    Bréchignac, C., Cahuzac, Ph., Roux, J.-Ph., Pavolini, D., Spiegelmann, F.: J. Chem. Phys.87, 5694 (1987)Google Scholar
  22. 22.
    Sattler, K.: Surf. Sci.156, 292 (1985)Google Scholar
  23. 23.
    Bréchignac, C., Cahuzac, Ph., Roux, J.-Ph.: J. Chem. Phys.88, 3022 (1988)Google Scholar
  24. 24.
    Gingerich, K.A., Cocke, D.L., Miller, F.: J. Chem. Phys.64, 4027 (1976)Google Scholar
  25. 25.
    Geusic, M.E., Freeman R.R., Duncan, M.A.: J. Chem. Phys.88, 163 (1988)Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • R. W. Farley
    • 1
  • P. Ziemann
    • 1
  • A. W. CastlemanJr.
    • 1
  1. 1.Department of ChemistryThe Pennsylvania State UniversityUniversity ParkUSA

Personalised recommendations