Acquisition of an Ultrahigh-Resolution Vacuum Ultraviolet Laser System

根据化学研究仪器和设施（CRIF）项目的资助，加州大学戴维斯分校化学系将获得超高分辨率真空紫外激光系统。该设备将加强以下领域的研究：a)简单多原子分子（包括选定的氨基酸）的高分辨率双色IR-VUV和VUV-IR光电离和脉冲场电离光电子研究；B)研究二硫化碳和二氧化碳的解离动力学，并确定产物分支比；c)开发用于表征纳米材料中碳和硅的高分辨率紫外显微技术；d)自由基动力学和光谱的VUV共振拉曼光谱研究；E)研究吸收分子的表面结构及其活性；f)空气污染物、气溶胶和生物分子的分析。这个多用户激光设备的存在，不仅将促进这些小组之间未来的合作项目，而且还将为化学系的研究生和博士后提供一个积极的学习环境，使他们熟悉物理、分析、大气和生物物理化学等各个前沿研究领域。一个全面的超高分辨率VUV激光系统，如目前不存在于美国或加拿大。该激光系统的应用代表了许多重要研究领域的前沿，如离子光谱，反应中间体的热化学，分析和大气采样的质谱，以及材料研究的显微镜。

With this award from the Chemistry Research Instrumentation and Facilities (CRIF) Program, the Department of Chemistry at the University of California in Davis will acquire an ultrahigh-resolution vacuum ultraviolet laser system. This equipment will enhance research in the following areas: a) high-resolution two-color IR-VUV and VUV-IR photoionization and pulsed-field-ionization-photoelectron studies of simple polyatomic molecules, including selected amino acids; b) studies of the dissociation dynamics of carbon disulfide and carbon dioxide and to determine product branching ratios; c) development of high resolution VUV microscopic techniques for characterization of carbon and silicon in nanomaterials; d) VUV resonance Raman spectroscopic studies of the dynamics and spectroscopy of radicals; e) studies on the surface structures of absorbed molecules and their activities; and f) analysis of airborne pollutants, aerosols, and biomolecules. The existence of this multi-user laser facility will not only induce future cooperative projects between these groups, but also provide a positive learning environment for graduate and postdoctoral students in the Chemistry Department to familiarize with various frontier research areas in physical, analytical, atmospheric and biophysical chemistry. A comprehensive ultrahigh-resolution VUV laser system such as this does not currently exist in the US or Canada. The application of this laser system represents a frontier in many important research fields, such as spectroscopy of ions, thermochemistry of reactive intermediates, mass spectrometry for analytical and atmospheric sampling, and microscopy for materials studies.