Electron Scattering Studies of Temporary Anion Formation in Hydrocarbons

Paul Burrow教授和Ken Jordan教授（匹兹堡大学） 得到了实验物理学基金会的资助 研究电子散射的化学程序 带负电荷的离子由此产生的应用 研究包括可能开发新的气体激光器， 与臭氧损失问题有关的大气研究以及 高压绝缘材料的发展。 伯罗和乔丹将研究在 气相中的碳氢化合物分子。在过去， 用电子透射光谱来定位这些状态 并确定相关的电子亲合势。最近 他们一直在监测振动模式的数量， 检查喷射电子的角分布。 新的工作重点是以下几个问题：（1）程度的 离子在其寿命期间经历的畸变，（2）什么 是激发各种振动模式的选择规则 通过共振？(3)的角度依赖性 共振散射过程反映了整个分子 对称或局部对称的部分， 电子是暂时附着的吗？（4）能解离 附件被用作远程设备之间耦合的探针 功能团体？

Prof. Paul Burrow and Prof. Ken Jordan (Univ. of Pittsburgh) are supported by a grant from The Experimental Physical Chemistry Program to study the scattering of electrons off of negatively charged ions. Applications resulting from this research include the possible development of new gas lasers, atmospheric studies related to the ozone loss problem and the development of high voltage insulating materials. Burrow and Jordan will study temporary anion formation in hydrocarbon molecules in the gas phase. In the past they have used electron transmission spectroscopy to locate these states and determine the associated electron affinities. More recently they have been monitoring vibrational mode populations by examining the angular distribution of the ejected electrons. The new work focuses on the following issues: (1) The degree of distortion that an ion undergoes during its lifetime, (2) What are the selection rules for exciting various vibrational modes via a resonance? (3) Does the angular dependence of the resonant scattering process reflect the overall molecular symmetry or the local symmetry of the moiety to which the electron is temporarily attached? and (4) Can dissociative attachment be used as a probe of coupling between remote functional groups?