POTENTIAL AND KINETIC ELECTRON-EMISSION FROM CLEAN GOLD INDUCED BY MULTICHARGED NITROGEN-IONS

被引：29

作者：

VANA, M ^{[1
]}

KURZ, H ^{[1
]}

WINTER, HP ^{[1
]}

AUMAYR, F ^{[1
]}

机构：

[1] VIENNA TECH UNIV,INST ALLGEMEINE PHYS,A-1040 VIENNA,AUSTRIA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1995年 / 100卷 / 2-3期

关键词：

D O I：

10.1016/0168-583X(94)00846-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Total electron yields have been determined from electron emission statistics measured for impact of N4+, N5+ and N6+ under normal incidence on clean polycrystalline gold. The projectile velocities were varied from 2 X 10(4) m/s, where potential emission (PE) is the exclusive electron emitting mechanism, over the threshold for kinetic emission (KE) at about (2-3) X 10(5) m/s, up to 10(6) m/s, where KE has become the dominant contribution. Separation of the respective PE- and KE contributions led to two remarkable results. (i) Comparison with measurements for inclined ion incidence from Hughes et al. (Phys. Rev. Lett. 71 (1993) 291) suggests that the resulting PE yields not only depend on the given ''vertical impact velocity'', presumably due to different conditions for the subsurface part of PE. (ii) The KE yields increase the stronger with impact velocity the lower the primary ion charge, which is explained from a similar projectile charge dependence of the leading electron production mechanism for the KE process.

引用

页码：402 / 406

页数：5

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