SITE-SPECIFIC NEUTRALIZATION OF LOW-ENERGY LI-7(+) SCATTERED FROM NA/AL(100)

被引：45

作者：

GERMAN, KAH

WEARE, CB

VAREKAMP, PR

ANDERSEN, JN

YARMOFF, JA

机构：

[1] LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

[2] LUND UNIV,INST PHYS,DEPT SYNCHROTRON RADIAT RES,S-22362 LUND,SWEDEN

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.70.3510

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Site-specific neutralization is seen for low energy (1-5 keV) Li-7+ ions scattered at large angles from Na-covered Al(100). Energy spectra of the ion yield are collected near the surface normal as a function of Na coverage. Li+ singly scattered from Na is almost completely neutralized, while the neutralization of ions scattered from Al is fairly insensitive to coverage, indicating a large difference in the local electrostatic potential above Na and Al sites. This shows that the phenomena of resonant charge exchange is capable of resolving atomic scale variations in the surface potential.

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页码：3510 / 3513

页数：4

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