Electron-Induced Desorption of Physisorbed H2 via Resonance Vibrational Excitation

被引：7
|
作者：
Andersson, S. [1 ]
Svensson, K. [2 ]
机构：
[1] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden
[2] Karlstad Univ, Dept Phys & Elect Engn, SE-65188 Karlstad, Sweden
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 15期
关键词：
STIMULATED DESORPTION; METAL SURFACES; MOLECULES; PHOTODESORPTION; SCATTERING; HYDROGEN; IMPACT; H2;
D O I：
10.1103/PhysRevLett.102.156104
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show by electron energy-loss measurements that desorption of physisorbed H-2 and D-2 induced by low-energy electrons takes place with large cross sections, predominantly via resonance excitation of the molecule-surface vibrational mode. The observed H-2, D-2 cross-section ratio supports a picture where rotation-translation conversion of the resonance excited j=0 -> 2 rotational transition contributes to the desorption of H-2, while this channel is energetically closed for D-2.
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页数：4
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