Desorption of metastable particles induced by electronic excitation at the surface of rare-gas solid with physisorbed hydrogen
Desorption of metastable particles induced by electronic excitation at the surface of rare-gas solid with physisorbed hydrogen
复制标题
物理吸附氢在稀有气体固体表面电子激发诱导亚稳态粒子解吸
DOI：
10.1116/1.581281
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
I. Arakawa
中科院分区：
文献类型：
--
作者：
A. Hayama;T. Kuninobu;T. Hirayama;I. Arakawa
系统地研究了物理吸附氢对稀有气体固体（Ar、Kr 和 Xe）表面电子激发引起的亚稳态粒子解吸的影响。当稀有气体固体表面在约 30 K 的温度下暴露于极少量的氢气时，在所有情况下都观察到氢亚稳态的解吸，并且通过空腔喷射过程在 Kr 的飞行时间光谱中出现了新的 Kr* 解吸物种。对于Ar，虽然没有发现解吸率显着增加，但通过空腔喷射过程解吸的Ar*的动能因氢吸附而增加。这些结果将根据基体电子亲和势的变化以及激发态下氢与稀有气体分子之间的相互作用进行讨论。
The effect of physisorbed hydrogen on the desorption of metastable particles induced by electronic excitation from the surface of rare-gas solids (Ar, Kr, and Xe) was investigated systematically. When the surface of a rare-gas solid was exposed to a very small quantity of hydrogen at a temperature of about 30 K, in all cases, the desorption of hydrogen metastables was observed, and new desorption species of Kr* via cavity ejection process appeared in time-of-flight spectra for Kr. For Ar, although no significant increase of desorption yield was found, the kinetic energy of Ar* desorbed through cavity ejection process was increased by hydrogen adsorption. These results will be discussed in terms of the change of electron affinity of the matrix and the interaction between hydrogen and rare-gas molecules in excited states.