Attenuation of low-energy (<10 eV) O+ ions in transmission through adsorbed alkali-metal layers

被引：13
作者：
Ageev, VN
Potekhina, ND
Yakshinskii, BV
Akbulut, M
Madey, TE
机构：
[1] RUTGERS STATE UNIV, SURFACE MODIFICAT LAB, PISCATAWAY, NJ 08855 USA
[2] RUSSIAN ACAD SCI, AF IOFFE PHYS TECH INST, ST PETERSBURG, RUSSIA
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.54.R5271
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the transmission of low-energy (<10 eV) O+ ions through adsorbed alkali-metal (Li, Na, K, and Cs) overlayers on an oxidized tungsten substrate. We find that the O+ yield is attenuated by the alkali-metal 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 attribute the attenuation of O+ in alkali-metal films for Theta>0.3 ML mainly to resonance electron tunneling from adsorbed alkali-metal atoms to excited states of oxygen.
引用
收藏
页码：R5271 / R5274
页数：4
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