UV laser-stimulated resonant desorption from metal surfaces: NO/Ni(100)

Weide, D.; Andresen, P.; Freund, Hans-Joachim

doi:10.1016/0009-2614(87)87307-4

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UV laser-stimulated resonant desorption from metal surfaces: NO/Ni(100)

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Weide, D., Andresen, P., & Freund, H.-J. (1987). UV laser-stimulated resonant desorption from metal surfaces: NO/Ni(100). Chemical Physics Letters, 136(1), 106-113. doi:10.1016/0009-2614(87)87307-4.

Cite as: https://hdl.handle.net/21.11116/0000-000E-449A-8

Abstract

NO chemisorbed on a Ni(100) surface at 170 K, has been desorbed with UV laser light (ArF, 193 nm = 6.42 eV) in the energy range of the most intense electronic absorption of the NO/Ni(100) system. The rotational and vibrational state distribution of the desorbing molecules is probed via laser-induced fluorescence. The desorbing molecules are vibrationally and rotationally excited. The rotational distribution is markedly non-Boltzmann. The velocity distributions are narrow and very different for various rotational states. They cannot be fitted to a Maxwell distribution. We believe that these results provide evidence for the resonant nature of the light-absorption-desorption process for NO on a Ni(100) surface.