Title

Photodesorption of hydrogen molecules physisorbed on Ag: Isotope dependence of translational-energy distribution

College

College of Science

Department/Unit

Physics

Document Type

Conference Proceeding

Source Title

Surface Science

Volume

593

Issue

1-3

First Page

229

Last Page

234

Publication Date

11-20-2005

Abstract

We report findings of our investigation on the non-thermal photodesorption dynamics of H2(D2) initially physisorbed on Ag. We photodesorbed the H2(D2) using a 6.4 eV pump photon, and then state-selectively probed the desorbing H2(D2) using the resonance-enhanced multi-photon ionization technique. The corresponding time-of-flight (TOF) spectra measured for the initial rotational states J = 1 and J = 0 indicate no particular J dependence. The mean translational temperature was ∼8 K for both H2 and D2. Using a coherent DIET (desorption induced by electronic transitions) model, we were able to reproduce the TOF spectra, including the observed isotope dependence. © 2005 Elsevier B.V. All rights reserved.

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Digitial Object Identifier (DOI)

10.1016/j.susc.2005.06.065

Disciplines

Physics

Keywords

Hydrogen; Silver; Adsorption; Physisorption

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