Resonance in the 1π photoemission cross-section of CO on Pt(111) measured by high harmonic radiation

被引：6

作者：

Tsilimis, G ^{[1
]}

Kutzner, J ^{[1
]}

Zacharias, H ^{[1
]}

机构：

[1] Univ Munster, Inst Phys, D-48149 Munster, Germany

来源：

SURFACE SCIENCE | 2003年 / 528卷 / 1-3期

关键词：

photoelectron spectroscopy; metallic surfaces; platinum; carbon monoxide; adsorption kinetics;

D O I：

10.1016/S0039-6028(02)02628-6

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：

Femtosecond pulses of a table-top, high-repetition rate (1 kHz) Ti:sapphire laser system are focussed into rare gases to produce high harmonic radiation in the range of 60-11 nm (hv = 20-120 eV). The c(4 x 2)-2CO-covered Pt(1 11) surface is investigated by angle resolved photoelectron spectroscopy using this radiation. Both the coarse tunability in steps of 3.1 eV as well as a fine tuning within a single harmonic are utilized in the measurements. The photoemission cross-section of CO induced structures, in particular the CO 1pi orbital, is investigated. For this state a narrow resonance is observed, which has not been reported so far. A resonant excitation of electrons from the occupied 3sigma level into the unoccupied 2pi level followed by the autoionization of the 1pi CO state or Auger decay is proposed to cause this resonance. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：171 / 176

页数：6

共 44 条

[1] First-principles study of CO bonding to Pt(111): validity of the Blyholder model [J].