Electron stimulated desorption of F + ions from MBE grown [formula omitted]

We have studied the detailed dynamics of electron stimulated desorption (ESD) of F + ions by low energy electrons from MBE grown Ca 0.6 Sr 0.4 F 2 GaAs(111) . A threshold for F + emission at an incident electron energy of 24 eV was observed, corresponding to the ejection of an electron from the Sr 4...

Full description

Saved in:
Bibliographic Details
Published in:Surface science 1994-04, Vol.307, p.372-376
Main Authors: Zanetti, R., Guest, R.J., Tang, K.B.K., Palmer, R.E., Grimshaw, M.P., Jones, G.A.C.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied the detailed dynamics of electron stimulated desorption (ESD) of F + ions by low energy electrons from MBE grown Ca 0.6 Sr 0.4 F 2 GaAs(111) . A threshold for F + emission at an incident electron energy of 24 eV was observed, corresponding to the ejection of an electron from the Sr 4p core level. The kinetic energy distribution of the desorbed ions was found to peak at ~ 1 eV and to be independent of the incident electron energy. Furthermore, the angular profile of desorbed F + ions exhibited a maximum normal to the surface with a full width at half maximum of 30°. These results are consistent with the Knotek-Feibelman mechanism for positive ion desorption.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(94)90421-9