Direct measurement of core-level relaxation dynamics on a surface-adsorbate system |
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| Authors: | Miaja-Avila L Saathoff G Mathias S Yin J La-o-vorakiat C Bauer M Aeschlimann M Murnane M M Kapteyn H C |
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| Institution: | JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA. Luis.Miaja-Avila@colorado.edu |
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| Abstract: | The coupling between electronic states in a surface-adsorbate system is fundamental to the understanding of many surface interactions. In this Letter, we present the first direct time-resolved observations of the lifetime of core-excited states of an atom adsorbed onto a surface. By comparing laser-assisted photoemission from a substrate with a delayed Auger decay process from an adsorbate, we measure the lifetime of the 4d(-1) core level of xenon on Pt(111) to be 7.1+/-1.1 fs. This result opens up time-domain measurements of surface dynamics where energy-resolved measurements may provide incomplete information. |
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