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Molecular Beam Studies of Spin-Orbit Effects and Anisotropy in Penning Ionization

彭宁电离中自旋轨道效应和各向异性的分子束研究

基本信息

批准号：
9121782
负责人：
Peter Siska
金额：
$ 29.88万
依托单位：
University of Pittsburgh
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1992
资助国家：
美国
起止时间：
1992-03-01 至 1995-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121782&HistoricalAwards=false
关键词：
Molecular Beam Studies Spin Orbit

项目摘要

In this project in the Physical Chemistry Program of the Chemistry Division, Prof. Peter Siska of the University of Pittsburgh will study crossed molecular beam reactions involving noble gas atoms with other atoms or diatomic molecules. Specifically, Penning and associative ionization dynamics will be investigated using Penning ionization electron spectroscopy (PIES). Also included are theoretical studies of the scattering of metastable noble gases by atoms and molecules on a state-specific level. %%% When an electronically excited atom A* meets a molecule BC, the atom may lose its energy by a variety of pathways. In some circumstances the loss of the atom's energy results in the ejection of an electron from the intermediate molecular complex, leaving a positively charged ion, which may be ABC+, BC+, or AB+. Such processes are known by the name "Penning ionization" and have been used to elucidate the electronic or molecular structure of large organic molecules, adsorbates on metal surfaces, and even liquid surfaces. These applications are possible because Penning ionization is sensitive to the spatial extent and shape of individual molecular orbitals, that is, the molecule's electron clouds. In this project various reactions involving Penning ionization will be examined in order to answer some basic questions regarding the mechanism by which this process works.

在这个项目中的物理化学计划的化学部，彼得·西斯卡教授的大学匹兹堡将研究交叉分子束反应涉及稀有气体原子与其他原子或双原子的分子。具体来说，潘宁和缔合电离动力学将研究使用潘宁电离电子光谱（PIES）。还包括理论研究，亚稳态惰性气体被原子和分子散射在国家层面上。 %%% 当电子激发的原子A* 遇到分子BC时，原子可以通过各种途径失去能量。在一些在这种情况下，原子能量的损失会导致电子从中间分子中射出络合物，留下带正电荷的离子，其可以是ABC+， BC+或AB+。这种过程被称为“Penning” 电离”并已用于阐明电子或大有机分子的分子结构，吸附在金属表面，甚至液体表面。这些应用是可能的，因为潘宁电离是敏感的单个分子轨道的空间范围和形状，就是分子的电子云。在这个项目中，涉及潘宁电离的反应将在为了回答有关该机制的一些基本问题，这个过程是如何运作的。