Structure and Dynamics of Ions and Free Radicals : Investigations by Submillimeter-wave Spectroscopy

点击翻译按钮获取中文摘要

This project was planned to pursue a further development of our on-going project on high-resolution spectroscopic investigation of molecular ions and free radicals which had been our main research objectives in the past several years. A major workhorse to promote our investigation is a submillimeter-wave spectrometer system. One such machine had been constructed on the basis of the past several years of research activities. The spectrometer covers the frequency range of 270-860 GHz with three back-ward wave oscillators. During the period of this research project, another similar submillimeter system has been completed. It utilizes a millimeter-wave frequency synthesizer as a local oscillator opposed to a millimeter-wave Gunn oscillator used in the old system. In addition, Fourier transform visible spectroscopy of the Swan system of C_2 and a visible system of C_3 has been carried out as a part of the collaboration with Professor Bernath at University of Waterloo by using a Bruker Fourier transform spectrometer.Major achievements obtained during this project term are mainly in the following areas.(1) Spectroscopy of molecular ions. (2) Extended investigation of the Swan band system of C_2. (3) Precise pressure broadening measurements of molecules relevant to the Earth's atmospheric chemistry.