EXO-ELECTRON EMISSION DURING THE OXIDATION OF ALKYLATED W(110) SURFACES

被引:28
作者
BRENTEN, H
MULLER, H
MAUSFRIEDRICHS, W
DIECKHOFF, S
KEMPTER, V
机构
[1] Physikalisches Institut der Technischen Universität Clausthal, D-3392 Clausthal-Zellerfeld
关键词
D O I
10.1016/0039-6028(92)90467-K
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We have investigated the emission of electrons and photons during the oxygenation of submonolayer (coverage theta(Alk) less-than-or-equal-to 1 monolayer (ML)) alkalated W(110) surfaces originating from a non-adiabatic surface reaction. Exo-electron energy distributions have been measured as a function of the alkali-precoverage. The electronic structure is monitored by MIES (metastable impact electron spectroscopy) and UPS as well as WF (work function) measurements. The surface WF turns out to be a crucial parameter in the investigation. An interpretation involving Auger de-excitation into the O2 molecule affinity level is supported by the results of substituting O2 by CO molecules in the experiments.
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页码:151 / 158
页数:8
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