Core Level Excitation and Relaxation in Molecules

大卫M.纽约州立大学石溪分校的汉森是 在实验物理化学计划的支持下， 激发，使用来自国家同步加速器光源的X射线辐射 （NSLS），核心电子在气相分子，然后研究 核孔衰变 他将决定如何保持这种选择性 在衰变过程中，识别所涉及的激发态，并查看 衰变过程的分子结构依赖性。 此外该 核电子激发后碎裂的机制和动力学 将被调查，因为将最终状态的能量分布及其 与势能面的关系。 要研究的过程在化学中起着关键作用， 在行星大气层和原子反应堆中。 例如，在一个示例中， X射线吸收光谱在天文学中用于提供信息 关于宇宙 核心电子激发和电离， 核-空穴衰变过程用于研究多相催化， 发生在电子和X射线显微镜技术中， 平版印刷 这些知识所提供的洞察力最终可能会产生 新材料。

David M. Hanson of the State University of New York-Stony Brook is supported by the Experimental Physical Chemistry Program to selectively excite, using x-ray radiation from the National Synchrotron Light Source (NSLS), core electrons in gas phase molecules, and then study the core-hole decay. He will determine how this selectivity is preserved during decay, identify the excited states involved, and look at the molecular structure dependence of the decay processes. In addition, the mechanisms and dynamics of fragmentation after core electron excitation will be investigated, as will the final state energy distribution and its relationship to the potential energy surface. The processes to be studied play a key role in the chemistry occurring in space, in planetary atmospheres, and in atomic reactors. For example, x-ray absorption spectra are used in astronomy to provide information about the universe. Core-electron excitation and ionization and core-hole decay processes are used to study heterogeneous catalysis, and occur with the techniques of electron- and x-ray microscopy and lithography. Insight provided by this knowledge may eventually produce novel materials.