Highly excited hydrogen molecules desorbed from a surface: Experimental results
Highly excited hydrogen molecules desorbed from a surface: Experimental results
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从表面解吸的高度激发的氢分子：实验结果
DOI：
10.1063/1.468242
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发表时间：
1994
影响因子：
4.4
通讯作者：
R. Hall
中科院分区：
文献类型：
--
作者：
C. Schermann;F. Pichou;M. Landau;I. Čadež;R. Hall
通过电子碰撞方法观察到金属表面原子重组引起的氢分子的振动激发。我们展示了获得的 H− 实验光谱，反映了解吸氢分子的振动群体。这项研究揭示了金属表面性质在复合过程中的基本作用：仅在那些强烈化学吸附原子氢的金属表面上观察到更高振动水平（从 v=5 到 v=8）的激发。为了解释这些观察结果，我们建议在这些表面上，在化学吸附的表面上形成物理吸附的 H 层。
The rovibrational excitation of hydrogen molecules resulting from recombination of atoms on a metallic surface has been observed by means of an electronic collision method. We present the obtained H− experimental spectra reflecting the vibrational populations of the desorbed hydrogen molecules. This study brings to light the fundamental role of the nature of the metallic surface in the recombination process: excitation of higher vibrational levels (from v=5 to v=8) is observed only on those metal surfaces which strongly chemisorb atomic hydrogen. To explain these observations we propose the formation, on these surfaces, of a physisorbed H layer on the chemisorbed one.