Density Dependence of Electronic States in Non-Polar Fluids

在实验物理化学计划的这个项目中，鲁本 威斯康星州大学同步辐射中心的Reininger 将探索致密介质中光致电离的基本方面。 的 主要的实验工具将是场致电离激发态， 真空紫外同步加速器辐射。 两个基本 致密介质中光电离的固有量， 正离子的能量和准自由电子的能量， 将被确定。 待研究的系统包括碘甲烷， 液态氩和液态氙、液态氩中的NO和纯乙烷。 这些研究有望产生实验数据， 理论模型描述了能级的演化， 可以测试和修正介质密度的函数。 最近有大量的理论工作被报道 液体的电子结构及其依赖性 为了了解这种结构是如何从 单个原子与它们所形成的固体相结合。 雷宁格博士会调查 结构通过使用场致光电离，这将提供 关于流体中离子的极化能量的信息 和电离释放出的电子的能量 这些信息 然后将被用来测试当前的理论，并指出这些理论如何 理论必须修改。

In this project in the Experimental Physical Chemistry Program, Ruben Reininger of The University of Wisconsin Synchrotron Radiation Center will probe fundamental aspects of photoionization in dense media. The main experimental tool will be field ionization of states excited by means of vacuum ultraviolet synchrotron radiation. The two basic quantities inherent to photoionization in dense media, the polarization energy of the positive ion and the energy of the quasi-free electron, will be determined. Systems to be studied include methyl iodide in liquid argon and liquid xenon, NO in liquid argon, and pure ethane. These studies are expected to yield experimental data with which recent theoretical models describing the evolution of energy levels as a function of the density of the medium may be tested and revised. A considerable amount of theoretical work has recently been reported on the electronic structure of liquids and the dependence of this structure on density in order to understand how this structure changes from individual atoms to the solids they form. Dr. Reininger will probe this structure by using field induced photoionization, which will provide information concerning the polarization energy of the ion in the fluid and the energy of the electron ejected by ionization. This information will then be used to test current theories and indicate how these theories must be modified.