Inner-Shell Excitation and Deexcitation in Small Molecules

在化学学部物理化学专业的这个项目中，俄勒冈州立大学的T. Darrah Thomas教授将利用电子能谱对分子的内壳激发和去激发进行研究。主要的兴趣是在气相中进行俄歇光电子符合光谱的设备的发展，以及使用零动能光谱来确定核心电离分子的寿命。此外，内壳层电离能与其他化学性质之间的关系将继续研究。在俄歇光电子能谱中，光谱是根据选定能量的光电子来测量的。这种技术使研究单个选定激发态的去激发途径成为可能，因此它是理解复杂俄歇谱的重要辅助手段。到目前为止，这种技术只应用于固体。这个项目的目的是将它的适用性扩展到气相系统。核电离能可以直接与影响许多化学性质的因素有关。在俄歇光电子能谱和核电离能两个领域的研究将有助于更好地理解化学现象。

In this project in the Physical Chemistry program of the Chemistry Division, Prof T. Darrah Thomas of the Oregon State University will engage in a study of the inner-shell excitation and deexcitation of molecules by electron spectroscopy. Of primary interest is the development of facilities to perform Auger-photoelectron coincidence spectroscopy in the gas phase and on using zero-kinetic energy spectroscopy to determine the lifetimes of core-ionized molecules. In addition, the relationship between the inner-shell ionization energies and other chemical properties will continue to be investigated. In Auger-photoelectron spectroscopy the spectrum is measured in coincidence with photoelectrons of selected energy. This technique makes it possible to study the deexcitation pathways of a single, selected excited state and thereby it is an important aid in the understanding of complex Auger spectra. This technique has heretofore been applied only to solids. The aim of this project is to extend its applicability to systems in the gaseous phase. Core-ionization energies can be related directly to the factors that influence a number of chemical properties. Research in the two areas of Auger photoelectron spectroscopy and core-ionization energies will contribute to a better understanding of chemical phenomena.