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

1. >气相大气自由基和分子光激发的光发射。紫外线用于激发大气气体或大气气体光破碎产生的自由基的荧光辐射。测量相应的光学吸收和荧光的横截面（在某种意义上是“效率”），以及相关的光谱数据，可以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. 紫外激发研究气溶胶的光学特性和形成过程。这是对吸附在实验产生的气溶胶颗粒表面的气体分子的研究。紫外光被用来激发荧光光谱，用于检测被吸附的物质和研究它们在吸附状态下的化学行为。总的目标是促进对大气非均相化学的理解，即涉及大气气体和颗粒物质之间相互作用的化学。

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.