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Proceedings Paper

Translational energy and desorption rate of NO from Pt(111) by femtosecond laser pulses
Author(s): Robert A. Pelak; M. F. Booth; D. G. Busch; Shiwu Gao; Wilson Ho
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Paper Abstract

Photodesorption of nitric oxide from Pt(111) using femtosecond laser pulses at 620 nm and 310 nm is found to result in a superlinear dependence of desorption yield on absorbed laser fluence. The translational energy distributions of the desorbed molecules are found to be nearly Maxwell-Boltzmann. For both 620 nm and 310 nm pulses with adsorbed fluences greater than 2.5 mJ/cm2, the average translational energy is found to increase linearly. At lower fluences, it is constant at 750 K, possibly suggesting a transition between DIMET and DIET desorption processes. In two pulse correlation measurements, it is found that the first pulse yield and the average translational energy have different widths as a function of delay between pulses.

Paper Details

Date Published: 25 September 1995
PDF: 11 pages
Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); doi: 10.1117/12.221466
Show Author Affiliations
Robert A. Pelak, Cornell Univ. (United States)
M. F. Booth, Cornell Univ. (United States)
D. G. Busch, Cornell Univ. (United States)
Shiwu Gao, Chalmers Univ. of Technology (Sweden)
Wilson Ho, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 2547:
Laser Techniques for Surface Science II
Janice M. Hicks; Wilson Ho; Hai-Lung Dai, Editor(s)

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