大气科学的高分辨率傅立叶变换光谱研究

J. Burkholder, J. Orlando, C. J. Howard
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引用次数: 0

摘要

NOAA航空实验室的大气化学动力学小组已经启动了一个项目,使用高分辨率傅立叶变换光谱仪(Bomem,型号DA3.002)研究气相化学反应的产物和瞬态物质的高分辨率光谱。为了更好地理解大气化学中重要的化学机制,气相反应产物的定量知识是必不可少的。从瞬态物质的高分辨率光谱研究中获得的精确光谱信息用于更好地表征这些物质的物理性质,并为在实验室和大气测量中测量这些物质提供必要的数据。我们所建立的傅里叶变换实验在原理上与雾霾室实验相似,雾霾室实验已非常成功地用于分析气相反应的稳定产物。我们的设备与烟雾室类型的主要区别在于,我们采用放电流动技术来制备反应物,而不是稳态光解,我们在更低的压力下工作,因此吸收线不会显着变宽,我们可以检测自由基反应物和产物本身,而不仅仅是反应的稳定产物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High Resolution Fourier Transform Spectroscopic Studies of the Atmospheric Sciences
A program has been initiated in the Atmospheric Chemical Kinetics group in the NOAA Aeronomy laboratory to study the products of gas phase chemical reactions and high resolution spectra of transient species using a high resolution Fourier transform spectrometer (Bomem, Model DA3.002). A quantitative knowledge of gas phase reaction products is essential in order to develop a better understanding of chemical mechanisms important in atmospheric chemistry. The precise spectroscopic information obtained from our high resolution spectroscopic studies of transient species is used to obtain a better characterization of the physical properties of these species and also to provide the data neccessary to measure these species in both laboratory and atmospheric measurements. The Fourier transform experiment we have setup is similar in principle to smog chamber type experiments which have been used very successfully to analyze the stable products of gas phase reactions. The major differences between our apparatus and the smog chamber type are that we employ discharge flow techniques to prepare reactants in lieu of steady state photolysis, we operate at much lower pressures so that absorption lines are not significantly pressure broadened, and we can detect the radical reactants and products themselves, not just the stable products of the reactions.
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