SINGLET TO TRIPLET CONVERSION IN LOW-ENERGY HE METASTABLE COLLISIONS WITH METAL-SURFACES - CONVERSION VIA HE+ FORMATION

Authors
MAKHMETOV GE BORISOV AG TEILLETBILLY D GAUYACQ JP
Citation
Ge. Makhmetov et al., SINGLET TO TRIPLET CONVERSION IN LOW-ENERGY HE METASTABLE COLLISIONS WITH METAL-SURFACES - CONVERSION VIA HE+ FORMATION, Surface science, 339(1-2), 1995, pp. 182-188
Citations number
25
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
339
Issue
1-2
Year of publication
1995
Pages
182 - 188
Database
ISI
SICI code
0039-6028(1995)339:1-2<182:STTCIL>2.0.ZU;2-Y
Abstract
Results of a quantitative study of the characteristics (energy positio n and ionization rates) of the two helium metastable states (2(1)S and 2(3)S) interacting with an aluminum surface are presented. They are u sed to study the singlet to triplet conversion process proceeding via He+ formation in thermal collisions of helium metastable atoms with me tal surfaces. The conversion mechanism via He+ formation is found to b e efficient for the larger workfunction surfaces, whereas, for lower w orkfunction surfaces, the conversion mechanism via He- formation which we studied earlier [Surf. Sci. 284 (1993) 337] is dominant.