High negative ion yield from light molecule scattering

J. A. Scheer, M. Wieser, P. Wurz, P. Bochsler, E. Hertzberg, S. A. Fuselier, F. A. Koeck, R. J. Nemanich, M. Schleberger

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Molecular oxygen and hydrogen ions were scattered at grazing incidence from several diamond-like carbon (DLC) surfaces in the energy range from 190 eV to 2400 eV. Most surfaces were hydrogen terminated. For incident positive oxygen ions, scattered negative ion fractions of up to 33% were recorded, and for incident positive hydrogen ions, negative ion fractions of more than 5% were measured. These values are among the highest ever reported, especially for oxygen. They have been matched only by results of scattering experiments using a hydrogen terminated surface of natural diamond.

Original languageEnglish (US)
Pages (from-to)330-339
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number1-4
StatePublished - Apr 2005
Externally publishedYes


  • Diamond like carbon (DLC)
  • Neutral particle imaging
  • Particle scattering
  • Surface ionization
  • Tetrahedral amorphous carbon
  • ta-C

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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