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

页码：R5271 / R5274

页数：4

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