 |
|
|
|
|
|
|
|
|
|
Abstract
Direct measurement of core-level relaxation dynamics on a surface-adsorbate system
L. Miaja-Avila, G. Saathoff, S. Mathias, J. Yin, C. La-o-vorakiat, M. Bauer, M. Aeschlimann, M. M. Murnane, H. C. Kapteyn
Phys. Rev. Lett. 101 (2008) 046101
The coupling between electronic states of an adsorbate and the surface on which it resides is fundamental to the understanding of many surface interactions. In this work, 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 highly-excited state dynamics at surfaces where, because of complex interactions, energy-resolved measurements may provide incomplete information.
|
|
|
|
|
|
|
|
