Suppression of potential electron emission for impact of slow multicharged fullerenes on clean gold

被引：25

作者：

Winter, HP ^{[1
]}

Vana, M ^{[1
]}

Betz, G ^{[1
]}

Aumayr, F ^{[1
]}

Drexel, H ^{[1
]}

Scheier, P ^{[1
]}

Mark, TD ^{[1
]}

机构：

[1] UNIV INNSBRUCK, INST IONENPHYS, A-6020 INNSBRUCK, AUSTRIA

来源：

PHYSICAL REVIEW A | 1997年 / 56卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.56.3007

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have measured absolute total electron emission yields for impact of carbon cluster ions C-i(q+) on atomically clean gold, as a function of cluster size (up to i = 60), charge (up to q = 5), and kinetic energy (up to 165 keV). Besides a linear dependence on cluster size and occurrence of electron emission well below the classical kinetic emission threshold, we find no dependence on the fullerene charge, and thus a suppression of potential electron emission. This is in contrast to the interaction of multicharged atomic ions with surfaces. We present molecular-dynamics calculations which provide evidence of fast quenching of the primary excitation energy via fragmentation of the projectiles.

引用

页码：3007 / 3010

页数：4

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