Detail publikace

Matrix effects in the neutralization of He ions at a metal surface containing oxygen

KÜRNSTEINER, P. STEINBERGER, R. PRIMETZHOFER, D. GOEBL, D. WAGNER, T. DRUCKMÜLLEROVÁ, Z. ZEPPENFELD, P. BAUER, P.

Originální název

Matrix effects in the neutralization of He ions at a metal surface containing oxygen

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Charge exchange between He ions and a Ni(111) surface containing oxygen was studied by Low-Energy Ion Scattering, using 1.25 keV He+ as primary ions. The energy resolved yield of positive ions was detected after backscattering from Ni or O for different exposures of Ni(111) to molecular oxygen. Pronounced changes in the neutralization efficiency due to the presence of oxygen are observed for both, the adsorbate phase at low oxygen dose, and the NiO phase at high dose. The presence of O in the surface makes resonant charge transfer in a close collision possible. Evidence for a strong matrix effect is found: O in NiO neutralizes much more efficiently than O in the adsorbate phase. Independently, the different interaction stages of Ni–O and the surface structure were monitored by Photoelectron-Emission-Microscopy and Low-Energy Electron Diffraction.

Klíčová slova

Low energy ion scattering; LEIS; Charge exchange processes; Surface composition analysis; Metal oxide

Autoři

KÜRNSTEINER, P.; STEINBERGER, R.; PRIMETZHOFER, D.; GOEBL, D.; WAGNER, T.; DRUCKMÜLLEROVÁ, Z.; ZEPPENFELD, P.; BAUER, P.

Rok RIV

2012

Vydáno

13. 12. 2012

ISSN

0039-6028

Periodikum

Surface Science

Ročník

609

Číslo

1

Stát

Nizozemsko

Strany od

167

Strany do

171

Strany počet

5

BibTex

@article{BUT96555,
  author="Phillip {Kürnsteiner} and Roland {Steinberger} and Daniel {Primetzhofer} and Dominik {Goebl} and Thorsten {Wagner} and Zdena {Rudolfová} and Peter {Zeppenfeld} and P. {Bauer}",
  title="Matrix effects in the neutralization of He ions at a metal surface containing oxygen",
  journal="Surface Science",
  year="2012",
  volume="609",
  number="1",
  pages="167--171",
  issn="0039-6028"
}