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Velocity distribution of CO desorbing from Nio(100)/Ni(100) after picosecond UV laser irradioation

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Helden,  Gert von
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Redlich, B., Kirilyuk, A., Hoger, G., Helden, G. v., Meijer, G., & Zacharias, H. (2006). Velocity distribution of CO desorbing from Nio(100)/Ni(100) after picosecond UV laser irradioation. Chemical Physics Letters, 420(1-3), 110-114. doi:10.1016/j.cplett.2005.12.057.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-053D-A
Abstract
The UV laser-induced desorption of CO from an epitaxial film of NiO(1 0 0) on Ni(1 0 0) yields a linear dependence of the desorption signal on the laser intensity with a cross-section of (8.3 ± 0.9) × 10<sup>−18 </sup>cm<sup>2</sup>. Rotational and vibrational temperatures of 870 K and 1340 K, respectively, are observed. State-resolved velocity distributions are observed, where one part can be described by a Maxwellian flux distribution with <E<sub>kin</sub>>/2k ranging from 1000 to 1800 K. In addition a faster component is present which gains in importance for increasing J″. A distinct rotation–translational coupling is found.