Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
J Phys Chem A. 2012 Mar 1;116(8):1950-5. doi: 10.1021/jp210798c. Epub 2012 Feb 15.
We measured the photoelectron spectra and angular distributions of partially aligned N(2), O(2), and CO(2) in the rescattering plateau of above threshold ionization (ATI). The measured ATI electrons have relatively low collision energies (<15 eV). The photoelectron angular distributions (PAD) show clearly species and energy dependence. A simple two-center interference model was not able to consistently retrieve structural properties. We conclude that due to the interplay between the electrons and rescattering potential, the molecular structural information is obscured and cannot be extracted conveniently. However, the sensitivity of the PAD to the scattering potential in laser-induced electron diffraction promises a practical tool for studying electron-ion scattering dynamics.
我们测量了在阈上电离（ATI）再散射平台中部分排列的 N(2)、O(2)和 CO(2)的光电子能谱和角分布。测量的 ATI 电子具有相对较低的碰撞能量（<15 eV）。光电子角分布（PAD）清楚地显示了物种和能量的依赖性。一个简单的双中心干涉模型不能一致地提取结构性质。我们的结论是，由于电子和再散射势之间的相互作用，分子结构信息被掩盖，无法方便地提取。然而，PAD 对激光诱导电子衍射中散射势的敏感性为研究电子-离子散射动力学提供了一种实用工具。
