No Cover Image

Journal article 298 views

Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model

A. González Ureña, H.H Telle, J Tornero, Helmut Telle

Journal of Molecular Structure, Volume: 1031

Swansea University Author: Helmut Telle

Full text not available from this repository: check for access using links below.

Check full text

DOI (Published version): 10.1016/j.molstruc.2012.07.032

Abstract

A simple, inelastic electron-scattering dynamical model is presented to account for vibrational excitation in molecular adsorbates. The basic two ingredients of the theoretical model are: (i) the conservation of the total angular momentum, and (ii) the requirement of a critical time to allow for the...

Full description

Published in: Journal of Molecular Structure
ISSN: 0022-2860
Published: 2013
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa14490
Abstract: A simple, inelastic electron-scattering dynamical model is presented to account for vibrational excitation in molecular adsorbates. The basic two ingredients of the theoretical model are: (i) the conservation of the total angular momentum, and (ii) the requirement of a critical time to allow for the intra-molecular energy re-arrangement of the transient negative-ion complex. The model is applied to the vibrational excitation dynamics of molecules chemisorbed at sub-monolayer conditions on ordered metal surfaces. This was exemplified for Acrylonitrile adsorbed on Cu(100), whose vibrational excitation was studied via energy loss spectra of low-energy two-photon photoemission (2PPE) electrons, and for ammonia (NH3 and ND3) adsorbed on Cu(100), being probed in a STM experiment. Fits of the model to the data allowed for deducing the energy threshold of the vibrational excitation of the C=C and C-(triple-bond)-N bonds of the ACN adsorbate molecules, and the threshold for the symmetric nu1-stretch mode excitation of adsorbed NH3/ND3. Also, information about the temporal dynamics underlying the inelastic electron scattering was gained.
College: Faculty of Science and Engineering
End Page: 69

Similar Items