MEASUREMENT OF AUTOIONIZATION RATES FOR ELECTRON-EMISSION ABOVE A METAL-SURFACE

被引：58

作者：

DAS, J

MORGENSTERN, R

机构：

[1] Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen

来源：

PHYSICAL REVIEW A | 1993年 / 47卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.47.R755

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present K Auger spectra arising from collisions of N6+ ions with a Ni(110) target for different kinetic energies and observation angles. The bulk of the electrons is ascribed to emission below the surface. At very low collision velocities (v(perpendicular-to) less-than-or-equal-to 10(-2) a.u.) we find a pronounced contribution from electrons emitted prior to impact. The velocity dependence of the above-surface component is used for the experimental determination of the time scales involved in electron emission above the surface. Comparison with theoretical estimates is also presented.

引用

页码：R755 / R758

页数：4

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