Energy loss of low energy protons on LiF(100): Surface excitation and H- mediated electron emission

Authors
Roncin, P Villette, J Atanas, JP Khemliche, H
Citation
P. Roncin et al., Energy loss of low energy protons on LiF(100): Surface excitation and H- mediated electron emission, PHYS REV L, 83(4), 1999, pp. 864-867
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
4
Year of publication
1999
Pages
864 - 867
Database
ISI
SICI code
0031-9007(19990726)83:4<864:ELOLEP>2.0.ZU;2-D
Abstract
Impact of 600 eV protons at grazing incidence on LiF(100) is studied with a new coincidence technique combining energy loss and electron spectroscopy. Correlation between the secondary electrons and the charge state of the sc attered projectiles demonstrates the role of the H- ions formed on the surf ace as precursors for electron emission. However, the main channel for ener gy loss is not associated with electron emission but is interpreted as the population of surface excitons.