The Spectroscopy of Chemical Intermediates and Other Transient Species

米勒教授得到了实验物理学的支持。 化学计划，以调查各种光谱 瞬时化学物种 化学中间体，如 活性原子、自由基和分子离子经常起作用， 在燃烧、溶剂化、合成 过程和大气化学。 光谱 鉴定和表征对于以下两方面都很重要， 监测这些中间体，并了解它们的 结构和相互作用。 两个在NSF支持下建造的设施被用于 这项工作 一个专门研究离子的设施 簇，使用激光诱导荧光探测簇 结构和飞行时间质谱来确定 原子数。 第二个装置准备中性 脉冲超音速射流中的自由基，用于超高分辨率 脉冲激光光谱学旨在揭示 旋转结构 正在调查的物种范围从 小的多原子到多环芳族基团，包括 含有离子或开壳自由基的簇。

Professor Miller is supported by the Experimental Physical Chemistry Program to investigate the spectroscopy of various transient chemical species. Such chemical intermediates as reactive atoms, free radicals, and molecular ions often play critical roles in reactions in combustion, solvation, synthetic processes, and the chemistry of the atmosphere. Spectroscopic identification and characterization is important both for monitoring these intermediates and for understanding their structures and interactions. Two facilities constructed under prior NSF support are used in this work. One facility, dedicated to the study of ionic clusters, uses laser-induced fluorescence to probe cluster structure and time-of-flight mass spectrometry to determine the number of atoms. The second apparatus prepares neutral radicals in a pulsed supersonic jet for ultra-high resolution pulsed laser spectroscopy designed to reveal details of rotational structure. Species under investigation range from small polyatomics to multi-ring aromatic radicals and include clusters containing ions or open-shell radicals.