ATTENUATION OF LOW-ENERGY (LESS-THAN-10 EV) O-METAL LAYERS( IONS IN TRANSMISSION THROUGH ADSORBED ALKALI)

Authors
AGEEV VN POTEKHINA ND YAKSHINSKII BV AKBULUT M MADEY TE
Citation
Vn. Ageev et al., ATTENUATION OF LOW-ENERGY (LESS-THAN-10 EV) O-METAL LAYERS( IONS IN TRANSMISSION THROUGH ADSORBED ALKALI), Physical review. B, Condensed matter, 54(8), 1996, pp. 5271-5274
Citations number
18
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
8
Year of publication
1996
Pages
5271 - 5274
Database
ISI
SICI code
0163-1829(1996)54:8<5271:AOL(EO>2.0.ZU;2-9
Abstract
We report the transmission of low-energy (<10 eV) O+ ions through adso rbed alkali-metal (Li, Na, K, and Cs) overlayers on an oxidized tungst en substrate. We find that the O+ yield is attenuated by the alkali-me tal overlayers. For Theta>0.3 ML, we derive attenuation cross sections of (18+/-2)X10(-15) cm(2) for Cs, (13+/-1)X10(-15) cm(2) for K, (5+/- 1)X10(-15) cm(2) for Na, and (3.3+/-0.3)X10(-15) cm(2) for Li. We attr ibute the attenuation of O+ in alkali-metal films for Theta>0.3 ML mai nly to resonance electron tunneling from adsorbed alkali-metal atoms t o excited states of oxygen.