Optical Emissions from Photoexcitation of Atmospheric Radicals and Molecules in the Gas Phase and on Aerosol Surfaces

气相和气溶胶表面上的大气自由基和分子的光激发光发射

• 批准号: 8715193
• 负责人: Long Lee
• 金额: $ 44.7万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-01-15 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715193&HistoricalAwards=false
• 关键词: Optical; Emissions; Photoexcitation; Atmospheric; Radicals

1. >Optical emissions from photoexcitation of atmospheric radicals and molecules in the gas phase.> Ultraviolet light is used to excite fluorescent radiation from atmospheric gases or from free radicals produced by photofragmentation of atmospheric gases. Measurements of the cross sections ("efficiencies," in a sense) for the corresponding optical absorptions and fluorescences, along with associated spectroscopic data, can be used for designing detection techniques and for monitoring the rates of chemical reactions of these radicals or molecules. 2. >Optical characteristics and formation processes of aerosols studied by ultraviolet excitation>. This is a study of gas molecules adsorbed on the surfaces of experimentally generated aerosol particles. Ultraviolet light is used to excite fluorescent spectra both for detection of the adsorbed species and for studying their chemical behavior in the adsorbed state. The general objective is to advance the understanding of the heterogeneous chemistry of the atmosphere, i.e., chemistry involving interactions between the atmospheric gases and particulate matter.

1. >来自大气光激发的光发射 气相中的自由基和分子。 紫外线用于激发荧光辐射 从大气中的气体或从自由基产生的 大气气体的光致碎裂。 测量 横截面（“效率”，在某种意义上）， 相应的光学反射和荧光，沿着 与相关的光谱数据，可用于设计 检测技术和监测化学品 这些自由基或分子的反应。 2. >光学特性和形成过程 通过紫外激发研究气溶胶>。 这是一个研究气体分子吸附在表面 实验产生的气溶胶粒子。 紫外 光用于激发荧光光谱， 的吸附物种和研究其化学行为 处于吸附状态。 总体目标是推进 对非均相化学的理解 大气，即，化学反应，涉及 大气气体和颗粒物。