CHARGE-TRANSFER DYNAMICS OF LOW-ENERGY COLLISIONS OF LI+ WITH ALKALI-COVERED CU(001)

被引:24
作者
BEHRINGER, ER
ANDERSSON, DR
GOODSTEIN, DM
KASEMO, B
COOPER, BH
MARSTON, JB
机构
[1] BROWN UNIV, DEPT PHYS, PROVIDENCE, RI 02912 USA
[2] CHALMERS UNIV TECHNOL, DEPT APPL PHYS, S-41296 GOTHENBURG, SWEDEN
基金
美国国家科学基金会;
关键词
D O I
10.1016/0168-583X(93)95769-2
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We present measurements of branching ratios to different final states of the scattered particles for 400 eV Li+ ions incident on alkali-covered Cu(001). In particular, we have measured the charge state fractions and the relative yield of excited states in the scattered flux as a function of the adsorbate-induced work function shift. The results of a resonant charge transfer theory which includes excited states, negative ions, and level crossings are compared to the measurements. Qualitative agreement is achieved with the observed work function dependence of both the charge state fractions and the relative yield of Li(2p). In particular, the theory predicts that the peak observed in the Li(2p) yield is due to a competition between the Li(2p) state and the Li-(2s2) state.
引用
收藏
页码:3 / 10
页数:8
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