Journal of Chemical Physics
Feedback | Help | Exit
The Journal of Chemical Physics
Search:
   
 
 
 
Previous Article
Near-infrared band of the nitrate radical NO3 observed by diode laser spectroscopy
We have analyzed the near-infrared band of NO3 observed at 7602 cm–1 by using diode laser spectroscopy. Most of the spectral lines were recorded using source-frequency modulation. Zeeman modulati...
Next Article
Determination of rate constants for butene isomerization by a temporal inversion method
The determination of rate constants for chemical reaction systems is of considerable practical importance. This paper introduces a temporal inversion method for parameter identification of dynamical s...

Capture of lithium by 4He clusters: Surface adsorption, Penning ionization, and formation of HeLi+

J. Chem. Phys. 107, 2839 (1997); doi:10.1063/1.474642

Issue Date: 22 August 1997

You are not logged in to this journal. Log in

Adi A. Scheidemann
University of Washington, Department of Chemistry, Seattle, Washington 98125

Vitaly V. Kresin
University of Southern California, Department of Physics and Astronomy, Los Angeles, California 90089-0484

Henry Hess
University of Washington, Department of Chemistry, Seattle, Washington 98125
We investigate the capture of lithium atoms by a beam of large cold helium clusters and subsequent ion production by electron impact. Li atoms are efficiently picked up by the He droplets, although with a cross section significantly lower than that for other atoms and molecules. The mass spectrum reveals the presence of Li atom and dimer ions, as well as the weakly bound complex HeLi+, confirming that capture by He-cluster beams can be used for efficient soft ionization of fragile species. The electron-energy dependence of the Li+, Li<sub>2</sub><sup> + </sup>, and HeLi+ yield shows that they are formed primarily by Penning ionization in a collision with a metastable He atom in the droplet. This leads to the conclusion that lithium metal atoms are not submerged in the helium clusters but locate on the surface, corroborating theoretical predictions for bulk helium surfaces and spectroscopic measurements. ©1997 American Institute of Physics.
History: Received 3 March 1997; accepted 21 May 1997
Permalink: http://link.aip.org/link/?JCPSA6/107/2839/1
BUY THIS ARTICLE   (US$24)
Download PDF (104 kB) View Cart

KEYWORDS and PACS

Keywords
PACS
  • 82.30.Cf
    Physical Chemistry Specific chemical reactions; reaction mechanisms Atom and radical reactions; chain reactions
  • 34.50.Fa
    Atomic and molecular collision processes and interactions Scattering of atoms, molecules, and ions Electronic excitation and ionization of atoms (including beamfoil excitation and ionization)
  • 34.80.Gs
    Atomic and molecular collision processes and interactions Electron scattering Molecular excitation and ionization by electron impact
  • 36.40.Jn
    Studies of special atoms, molecules, and their ions; clusters Atomic and molecular clusters Reactivity of clusters
  • 31.50.+w
    Electronic structure of atoms, molecules and their ions: theory Excited states
  • YEAR: 1996-97

RELATED DATABASES


To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (32)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. A. Bartelt, J. D. Close, F. Federmann, F. Quaas, and J. P. Toennies, Phys. Rev. Lett. 77, 3525 (1996).
  2. M. Hartman, R. E. Miller, J. P. Toennies, and A. F. Vilesov, Science 272, 1631 (1996).
  3. M. Lewerenz, B. Schillings, and J. P. Toennies, Chem. Phys. Lett. 206, 381 (1993).
  4. M. Lewerenz, B. Schilling, and J. P. Toennies, J. Chem. Phys. 102, 8191 (1995).
  5. A. Scheidemann, J. P. Toennies, and J. A. Northby, Phys. Rev. Lett. 64, 1899 (1990).
  6. A. Scheidemann, B. Schilling, J. P. Toennies, and J. A. Northby, Physica 165–166, 135 (1990).
  7. A. Scheidemann, B. Schilling, and J. P. Toennies, J. Phys. Chem. 97, 2128 (1993).
  8. P. Sindzingre, M. L. Klein, and D. M. Ceperley, Phys. Rev. Lett. 63, 1601 (1989).
  9. P. Taborek and J. E. Rutledge, Physica B 197, 283 (1994).
  10. H. Hess, D. S. Larsen, and A. A. Scheidemann (unpublished).
  11. F. Ancilotto, E. Cheng, M. W. Cole, and F. Toigo, Z. Phys. B 98, 323 (1995).
  12. P. B. Lerner, M. W. Cole, and E. Cheng, J. Low Temp. Phys. 100, 501 (1995).
  13. J. Higgins, C. Callegari, J. Reho, F. Stienkemeier, W. E. Ernst, K. K. Lehmann, M. Gutowski, and G. Scoles, Science 273, 629 (1996).
  14. V. V. Kresin, A. Scheidemann, and W. D. Knight, Phys. Rev. A 49, 2696 (1993).
  15. I. Barin, Thermochemical Data of Pure Substances, 3rd ed., Vol. II (VCH, Weinheim, 1995).
  16. B. E. Callicoatt, D. D. Mar, V. A. Apkarian, and K. C. Janda, J. Chem. Phys. 105, 7872 (1996).
  17. P. E. Siska, Rev. Mod. Phys. 65, 337 (1993).
  18. A. Scheidemann, J. P. Toennies, J. A. Northby, Phys. Rev. Lett. 64, 1899 (1990).
  19. V. Kresin, A. Scheidemann, and H. Hess (unpublished).
  20. D. L. Cooper, J. Gerratt, and M. Raimondi, Mol. Phys. 56, 611 (1985), and references therein.
  21. P. Polak-Dingels, M. S. Rajan, and E. A. Gislason, J. Chem. Phys. 77, 3983 (1982).
  22. Z. Herman and V. [C-caron]ermák, Nature (London) 199, 588 (1963).
  23. Y. Murano, G. Izawa, K. Yoshihara, M. Takahashi, M. Kishimoto, and S. Suzuki, Int. J. Mass Spectrosc. Ion Phys. 41, 179 (1982).
  24. K. L. Bell, H. B. Gilbody, J. G. Hughes, A. E. Kingston, and F. J. Smith, J. Phys. Chem. Ref. Data 12, 891 (1983).
  25. R. Dorrenstein, Physica IX, 447 (1942).
  26. F. J. de Heer and R. H. J. Jansen, J. Phys. B 10, 3741 (1977).
  27. K. Martini, J. P. Toennies, and C. Winkler, Chem. Phys. Lett. 178, 429 (1991).
  28. A. Merz, M. W. Müller, M.-W. Ruf, H. Hotop, W. Mayer, and M. Movre, Chem. Phys. 145, 219 (1989).
  29. Our electron energy resolution does not permit us to resolve small (~1 – 1.5 eV) surface barrier and exciton shifts in the thresholds for He cluster ionization and metastable excitation (Refs. 25, 29, 30).
  30. H. Buchenau, J. P. Toennies, and J. Northby, J. Chem. Phys. 95, 8134 (1991).
  31. J. A. Northby, S. Yurgenson, and C. Kim, J. Low Temp. Phys. 101, 427 (1995).
  32. F. Stienkemeier, J. Higgins, C. Callegari, S. I. Kanorsky, W. E. Ernst, and G. Scoles, Z. Phys. D 38, 253 (1996).

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.


Copyright © American Institute of Physics