CRIF:ID- Development of a Pulsed Nozzle, Fourier Transform Rotational Spectrometer Operable Below 1000 MHz for Chemistry Research

CRIF:ID - 开发用于化学研究的脉冲喷嘴、傅里叶变换旋转光谱仪，工作频率低于 1000 MHz

• 批准号: 0820833
• 负责人: Stephen Cooke
• 金额: $ 32.08万
• 依托单位: University of North Texas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2011-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0820833&HistoricalAwards=false
• 关键词: CRIF; ID; Development; Pulsed; Nozzle

This award from the CRIF-ID program will allow Stephen Cooke in the Department of Chemistry at the University of North Texas to fully characterize and improve a cavity based, time domain, Fourier transform rotational spectrometer capable of recording spectral transitions below 1 GHz. It will also implement a low frequency fast passage version of the experiment to enable rapid location of spectral features. The availability of such an instrument is of considerable interest in regard to: 1. The geometric and electronic structural characterization of larger and/or heavier chemical species than can be routinely studied with high resolution, time domain techniques. 2. Synchronizing laboratory based measurements and radio-astronomy measurements in the region of 20 cm and above. The availability of a low frequency instrument will also aid in the laboratory detection of large molecules that may exist in the interstellar medium. Fourier transform rotational (microwave) spectrometers measure transitions between rotational energy levels of molecules in the gas phase. These spectra can be analyzed to obtain insight on the arrangment of the atoms in the species under study, in essence information on its structure. Structural information is important for understanding chemical and biochemical properties and reactivity. This instrument development project will be carried out by graduate and undergraduate students who will gain skills in the design and construction of sophisticated state-of-the-art instrumentation.

这份来自CRIF-ID项目的合同将允许北德克萨斯大学化学系的Stephen Cooke全面表征和改进一种基于空腔的时域傅立叶变换旋转光谱仪，该光谱仪能够记录低于1ghz的光谱跃变。它还将实施一个低频快速通道版本的实验，以实现光谱特征的快速定位。提供这样一份文书在以下方面具有相当大的意义：与常规高分辨率时域技术相比，更大和/或更重的化学物质的几何和电子结构特征可以进行研究。2. 同步实验室测量和射电天文测量在20厘米及以上的区域。低频仪器的可用性也将有助于在实验室检测可能存在于星际介质中的大分子。傅里叶变换旋转（微波）光谱仪测量分子在气相中的旋转能级之间的跃迁。这些光谱可以通过分析来了解所研究的物质中原子的排列，本质上是关于其结构的信息。结构信息对于理解化学和生物化学性质和反应性非常重要。该仪器开发项目将由研究生和本科生进行，他们将获得设计和建造先进仪器的技能。