Reagent State Selection and Transition State Electron Spectroscopy in Crossed Beam Studies of the Metastable Rare Gases (Chemistry)

在交叉超声速分子束中研究了激发态选择亚稳原子氖和氩与其他原子和分子碰撞时的相互作用和猝灭。要测量的散射属性包括非反应散射角分布、激发态产物角分布和潘宁电离的质量分辨相对截面，所有这些都是在很宽的碰撞能量范围内进行的。彭宁电离电子能谱是在高运动分辨率条件下测量的。结合其他散射研究，这些结果将用于估计更复杂的目标分子的潜在表面，以及将整个潘宁共振宽度（复合物抗电离的寿命）分解为轨道特定分量。本研究项目对理解化学过程的基本反应动力学作出了重要的实验和理论贡献。这种激发态光谱处理了中性-中性反应动力学和离子-分子反应动力学之间可能存在差异和相似之处的边界线。

Interactions and quenching of the excited state-selected metastable atoms neon and argon in collisions with other atoms and molecules are to be studied in crossed supersonic molecular beams. Scattering attributes to be measured include nonreactive scattering angular distributions, angular distributions of excited products, and mass-resolved relative cross sections for Penning ionization, all carried out over a wide range of collision energy. Penning ionization electron spectra are to be measured under conditions of high kinematic resolution . In conjunction with other scattering studies, these results will be used to estimate potential surfaces for more complicated target molecules, as well as to resolve the overall Penning resonance width (lifetime of the complex against ionization) into orbital-specific components. This research program makes an important experimental and theoretical contribution to the understanding of the fundamental reaction dynamics of chemiionization processes. This kind of spectroscopy of excited intermediate states addresses the boundary line where differences and similarities are likely to be found between neutral-neutral and ion-molecule reaction dynamics.