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.
Český název
Matrix effects in the neutralization of He ions at a metal surface containing oxygen
Anglický název
Matrix effects in the neutralization of He ions at a metal surface containing oxygen
Typ
článek v časopise - ostatní, Jost
Jazyk
en
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.
Český 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.
Anglický 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 česky
Low energy ion scattering; LEIS; Charge exchange processes; Surface composition analysis; Metal oxide
Klíčová slova anglicky
Low energy ion scattering; LEIS; Charge exchange processes; Surface composition analysis; Metal oxide
Rok RIV
2012
Vydáno
13.12.2012
ISSN
0039-6028
Ročník
609
Číslo
1
Strany od–do
167–171
Počet stran
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",
year="2012",
volume="609",
number="1",
month="December",
pages="167--171",
issn="0039-6028"
}