Advertisement

Spectroscopy of extremely cold silver clusters in helium droplets

  • F. Federmann
  • K. Hoffmann
  • N. Quaas
  • J. P. Toennies
Conference paper

Abstract

The first highly resolved electronic spectra of small non-alkali metal clusters embedded in nanoscopic helium droplets (N ≈ 20 000) are presented. The helium as an extremely cold liquid matrix with a temperature of 0.37 K. Resonant two-photon-ionization is used for size-selective spectroscopy on a silver cluster distribution (N ≤ 10). Results are reported for Ag2. Ag3 and for Ag8, For the latter, a very narrow absorption spectrum is resolved corresponding to the Ag8 plasmon resonance. The linewidth of the observed resonance is a factor of two smaller than theoretical zero-temperature predictions for the plasmon line width of closed-shell metal clusters. In contrast, the lifetime of the Ag8 resonance is estimated to be of the order of nanoseconds, which is inconsistent with the plasmon picture and typical for molecular transitions.

PACS

36.40.Mr Spectroscopy of clusters 67.40Yv Impurities and other defects in 4He 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Reference

  1. 1.
    C. Ellert. M. Schmidt, C. Sc.hniitt., T. Reiners, H. Haberland: Phys. Rev. Lett. 75, 1731 (1995).ADSCrossRefGoogle Scholar
  2. 2.
    J. P. Toennies. A. F. Vilesov: Ararlu, Rev. Phys. Cher 1 (1998)Google Scholar
  3. 3.
    F. Stienkemeier, J. Higgins, W.E. Ernst, G. Scoles: Phys. Rev. Lett. 74. 3592 (1995)ADSCrossRefGoogle Scholar
  4. 4.
    J. D. Close, F. F.dermann; K. Hoffmann, N. Quaas: Che Phys. Lett. 276, 393 (1997)ADSCrossRefGoogle Scholar
  5. 5.
    M. Har’tmann. R.F. Miller, J.-P. Toennies, A. Vilesov: Phys. Rev. Lett, 75, 1566 (1995)ADSCrossRefGoogle Scholar
  6. 6.
    A. Bartelt, J.D. Close, F. Federmann, N. Quaas, J.-P. Then.Phys. Rev. Lett; 77, 3525 (1996)ADSCrossRefGoogle Scholar
  7. 7.
    J.D. Close, F. Federmann, K. Hoffmann, N. Quaas: J. Low. Temp. Phys. 11. 1, 661 (1998)ADSCrossRefGoogle Scholar
  8. K. Hoffmann: PhD-thesis, University of Göttingen (1999)Google Scholar
  9. 8.
    B. Schilling: PhD-thesis, University of Göttingen, nIPI- Bericht 14/1993: I. Harms: unpublished results, MPI für Strömungsforschung, GöttingenGoogle Scholar
  10. 9.
    D.M. Brink, S. Stringari: Z. Phys. D 15, 257 (1990)ADSCrossRefGoogle Scholar
  11. 10.
    A. Scheidemann, B. Schilling, J.-P. Toennies: J. Phys. Chem. 97, 2128 (1993).CrossRefGoogle Scholar
  12. 11.
    Katakuse, T. Ichihara, Y. Fujita, T. Matsuo, T. Sakurai, H. Matsuda: Int. J. Mass Spectrom. Ion Processes 74, 33 (1986)CrossRefGoogle Scholar
  13. 12.
    S. Kriïckeberg, G. Dietrich, K. Liitzenkirchen, L. Schweikhard, C. Walther, J. Ziegler: Int. J. Mass Spectrorn. Ion Processes 155, 141 (1996)ADSCrossRefGoogle Scholar
  14. 13.
    C. Jackschath. I. Rabin, W. Schulze: Z. Phys. D 22, 517 (1992)ADSCrossRefGoogle Scholar
  15. 14.
    V. Bonaiico-Koute:.V, L. Cegpiva, P. Fanti ci, J. Kout.eckY: J. Chem. Phys. 98, 7981 (1993)Google Scholar
  16. 15.
    W. Harbich. Y. Belyaev, R. Kleiber, J. Buttet: Surf. Rev. Lett. 3, 1147 (1996)CrossRefGoogle Scholar
  17. 16.
    J. Tißoesbäurnker, L. Köller, H.O. Lutz, K.H. Meiwes- Broer: Chem. Phys. Lett, 190, 42 (1992)ADSCrossRefGoogle Scholar
  18. 17.
    Z. Penzar, W. Eckardt, A. Rubio: Phys. Rev, B 42, 5040 (1990)ADSCrossRefGoogle Scholar
  19. 18.
    J.M. Pacheco. R.A. Broglia, B.R. Mottelson: Z. Phys. D 21. 289 (1991)ADSCrossRefGoogle Scholar
  20. 19.
    LaiHing, P. V. Cheng, M. A. Duncan: Z. Phys, D 13, 161 (1989)ADSCrossRefGoogle Scholar
  21. 20.
    T. Baumert. R. Thalu°eiser, V. Weill, G. Gerber: Z. Phys. D 26. 131 (1993)ADSGoogle Scholar
  22. 21.
    S. Fedrigo. W. Harbich, J. b3uttet: Phys. Rev. B 47, 107–116 (1999)Google Scholar
  23. 22.
    M. D. Morse. Advances in Metal and Semiconductor CItts ters. Vol. 1(JAI Press, Greenwich, Conn. 1993 ) p. 83Google Scholar
  24. 23.
    F. Valiimanna H. M. Frey, S. Leutwyler. M. Riley: Z. Phys. D 40. 30 (1997)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Italia 1999

Authors and Affiliations

  • F. Federmann
    • 1
  • K. Hoffmann
    • 1
  • N. Quaas
    • 1
  • J. P. Toennies
    • 1
  1. 1.Max-Planck-Institut für StrömungsforschungGöttingenGermany

Personalised recommendations