Desorption of H2, HD, and D2 through Temporary Negative Ion Formation

被引：2

作者：

Svensson, K. ^{[1
]}

Andersson, S. ^{[2
]}

机构：

[1] Karlstad Univ, Dept Phys & Elect Engn, SE-65188 Karlstad, Sweden

[2] Gothenburg Univ, Dept Phys, SE-41296 Gothenburg, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 19期

关键词：

ELECTRON-SCATTERING; VIBRATIONAL-EXCITATION; MOLECULES; SURFACES; PHYSISORPTION; RESONANCES;

D O I：

10.1103/PhysRevLett.109.196102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Physically adsorbed H-2, HD, and D-2 desorbs via the low-energy (2)Sigma(+)(u) electron scattering resonance with characteristic electron energy dependent cross sections as we show by desorption and electron energy-loss measurements. Only H-2 and HD desorb, for energetic reasons, via excitation of the j = 0 -> 2 rotational mode and its subsequent decay into free translational motion, while all three isotopes desorb by direct transitions to unbound continuum states, with a probability close to unity and an unexpectedly weak mass dependence similar to m(-1/2).

引用

页数：4

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