Dissociative grazing scattering of H-2(+) on metal surfaces: Analysis of the high-energy parts of the spectra of the scattered molecule constituents

Autor(en): Wojciechowski, IA
Medvedeva, MV
Ferleger, VK
Bruning, K
Heiland, W
Stichwörter: AG(111); BOMBARDMENT; CHARGE-TRANSFER; COVERED PD SURFACES; DEPENDENCE; HYDROGEN; Instruments & Instrumentation; IONS; Nuclear Science & Technology; ORIENTATION; Physics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear; SOLID-SURFACES; VIBRATIONAL-EXCITATION
Erscheinungsdatum: 2000
Herausgeber: ELSEVIER
Journal: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volumen: 164
Startseite: 626
Seitenende: 632
Zusammenfassung: 
In the present work we calculated the high energy tails of the energy distributions for hydrogen molecule constituents scattered from metal surfaces at grazing incidence of H-2(+), supposing the dissociative capture process to contribute mainly to H-2(+). No effect of the straggling on the high energy tails formation was considered. The harmonic oscillator approximation was employed for the calculation of the centre-of-mass distributions of the kinetic energy released in the dissociation process, ``vibrational temperature'' being the only free parameter of the theory. The comparison of the calculations with the experimental high-energy tails of the H spectra from the scattering of H-2(+) off Pt and Ag shows good agreement. The calculations yield information on the vibrational excitation of the molecules during the scattering process. (C) 2000 Elsevier Science B.V. All rights reserved.
Beschreibung: 
18th International Conference on Atomic Collisions in Solids (ICACS-18), ODENSE, DENMARK, AUG 03-08, 1999
ISSN: 0168583X
DOI: 10.1016/S0168-583X(99)01014-9

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