IONIZATION PROBABILITIES OF OXYGEN SPUTTERED FROM METAL-SURFACES

被引:34
作者
BAHRIM, B
TEILLETBILLY, D
GAUYACQ, JP
机构
[1] UNIV PARIS 11,COLLIS ATOM & MOLEC LAB,URA 281,CNRS,BATIMENT 351,F-91405 ORSAY,FRANCE
[2] ATOM PHYS INST,DEPT LASER,BUCAREST MAGURELE,ROMANIA
关键词
D O I
10.1016/0039-6028(94)91139-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The charge state of oxygen atoms sputtered from a metal surface is studied, using recent theoretical results on the O--Al surface. These were obtained with the coupled angular mode method and fully take into account the multielectron, multistate and polarization effects of the O--Al interaction. The O/O- ratio is determined for various velocities of the sputtered particles as a function of the metal surface workfunction. The O- fraction is found to vary very rapidly with the surface workfunction. A strong polarization effect is also observed, i.e. the O- survival probability strongly depends on its polarization (M(L) = 0 or +/- 1). The results are found in very good agreement with the experimental results of Yu (1981) on O- ions sputtered from O and alkali covered V and Nb surfaces.
引用
收藏
页码:189 / 197
页数:9
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