Temporary negative ion formation in interactions of low-energy inert gas ions (He+, Ne+) with Cs-adsorbed Cu(111) surfaces

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Q. B. Lu
  • D. J. O'Connor
  • B. V. King
  • Y. G. Shen
  • R. J. MacDonald

Detail(s)

Original languageEnglish
Pages (from-to)19-28
Journal / PublicationSurface Science
Volume341
Issue number1-2
Publication statusPublished - 1 Nov 1995
Externally publishedYes

Abstract

Low-energy (0.5-1 keV) inert gas ions (He+, Ne+) have been used to investigate the interaction of ions with Cs-covered Cu(111) surfaces. Electron spectra from the interaction were obtained for grazing angles of incidence. From the energy and angular distributions of emitted electrons, it can be confirmed that the sharp electron peaks with excitation energies of 19.32±0.08 and 16.15±0.08 eV are caused by the decays of He*-(1s2s2 2S) and Ne*-(2p53s2 2P) states, respectively. It was also found that negative ion resonances take place on the incoming trajectories far above the surface ion cores. The one-step two-electron capture has been proposed to explain the formation of negative-ion resonances. © 1995.

Research Area(s)

  • Adatoms, Alkali metals, Electron emission, Ion-solid interactions, scattering, channeling, Surface electronic phenomena

Citation Format(s)

Temporary negative ion formation in interactions of low-energy inert gas ions (He+, Ne+) with Cs-adsorbed Cu(111) surfaces. / Lu, Q. B.; O'Connor, D. J.; King, B. V.; Shen, Y. G.; MacDonald, R. J.

In: Surface Science, Vol. 341, No. 1-2, 01.11.1995, p. 19-28.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review