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。>来自气相中大气自由基和分子的光激发的光学排放。>紫外线用于激发大气气体或通过大气气体光碎片产生的自由基的荧光辐射。 可以使用横截面的测量（从某种意义上说，“效率”）用于相应的光吸收和荧光，以及相关的光谱数据，可用于设计检测技术和监测这些自由基或分子的化学反应速率。 2。>通过紫外线激发研究的气溶胶的光学特征和形成过程>。 这是对实验产生的气溶胶颗粒表面上吸附的气体分子的研究。 紫外线用于激发荧光光谱，以检测吸附物种和在吸附状态下研究其化学行为。 总体目标是提高对大气中异质化学的理解，即涉及大气气体和颗粒物之间相互作用的化学反应。