Laser-induced fluorescence spectroscopy of the E band of the <math><mtext>A</mtext><mtext>̃</mtext><mtext>-</mtext><mtext>X</mtext><mtext>̃</mtext></math> transition of SO2 cooled rotationally in a supersonic jet期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Laser-induced fluorescence spectroscopy of the E band of the $A ̃ - X ̃$ transition of SO₂ cooled rotationally in a supersonic jet

Authors:	Hajime Watanabe Soji Tsuchiya Seiichiro Koda

Institution:	Department of Pure and Applied Sciences, College of Arts and sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo 153, Japan;Department of Reaction Chemistry, Faculty of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan

Abstract:	The rotationally resolved, laser-induced fluorescence spectrum of the E band of the $A ?^{1} A_{2} - X ?^{1} A_{1}$ transition of SO₂ seeded in a supersonic jet was observed, and each rotational line was assigned on the basis of the ground state combination differences and the relative intensity data as a function of the rotational temperature. It was demonstrated that the line congestion was reduced significantly in the spectrum of the jet, and some of the lines, e.g., ^rR₀(0), were assigned unambiguously. This makes it possible to determine the vibronic band origin with an error of less than 0.2 cm^?1.

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