NO2 Ã 2B2 state properties from Zeeman quantum beats

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Abstract
We have observed the temporal modulation of fluorescence induced by a static magnetic field after selective optical excitation of a single fine structure level via the à 2B2–X̃ 2A1 electronic transition in NO2. The rotationally resolved population and alignment decay rates, fluorescence polarization anisotropy, and magnitude and sign of the excited Landé g factor are determined simultaneously from measurement of the Zeeman quantum beats. The importance of the these properties to the description of the à state of NO2 is discussed.