J. Phys. Chem. B, 106 (33), 8233 -8239, 2002. 10.1021/jp020671e S1089-5647(02)00671-5
Web Release Date: July 3, 2002

Copyright © 2002 American Chemical Society

Dissociative Grazing Scattering of H2+ Ions from Metal Surfaces

Igor Wojciechowski, Marina Medvedeva, Barbara J. Garrison, Vladimir K. Ferleger, and Werner Heiland*

Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania, 16802, Arifov Institute of Electronics, Tashkent 700143, Uzbekistan and Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany

Received: March 11, 2002

In Final Form: May 30, 2002

Abstract:

Energy distributions of H atoms resulting from grazing scattering of H2+ from metal surfaces are calculated analytically and by using classical trajectories simulations. The main mechanism leading to dissociation of H2+ is proposed to be dissociative capture of an electron from the metal into the antibonding state of the H2 molecule. It is shown that the energy distributions of scattered atoms yield information of both the molecular axis orientation and the vibrational excitation of the molecules during the scattering process.


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