Knowledge Bank

The $NO2$ 6125 \AA \ region wag chosed for investigation, because of the strength of the transitions and because of the seeming simplicity of this region. From an analysis of the rotationally resolved fluorescence of $NO2$ excited by a narrow band (0.03 \AA) \ tunable dye $laser,1$ quantum numbers have been assigned to 150 transitions in the 6125 \AA \ region. Four vibronic bands are observed in a 20 \AA \ interval, two of which have been previously $reported.2$ A rotational analysis of the 6125 \AA \ and 6126 \AA \ bands is presented, while the small number of transitions assigned to the 6117 \AA \ and 6119 \AA \ bands precludes analysis.