THE LASER INDUCED FLUORESCENCE SPECTRUM OF NITROGEN DIOXIDE
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Date
1973
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Ohio State University
Abstract
The high resolution fluorescence spectrum induced by the 5145 {\AA} line of an argon-ion laser shows complicated features as previously $reported.^{1}$ The $\nu_{2}$ band has been studied again using a single mode laser and a high resolution spectrograph equipped with an image intersifier. The spectrum was simplified considerably in the single mode excitation. As a result, almost all the spectral lines have been assigned to the direct emission from the initial excited states, in other words, collision induced lines have not been identified even using a wide range of sample pressures. These data give information on some of the ground electronic state constants, $\alpha_{2}^{A}, \gamma_{22}^{A}\alpha_{2}^{B}, x_{22}$ etc. and also enable us to draw an energy level diagram of the excited electronic state. Although strong perturbations are apparent in these $levels^{2}$, this diagram gives an idea of the structure of the excited state. $^{1}$ K. Abe, F. Myers, T. K. McCubbin and S. R. Polo, J. Mol. Spectrosc. 38, 552 (1971). $^{2}$ A. E. Douglas and K. P. Huber, Can. J. Phys. 43, 74 (1965). A. E. Douglas, J. Chem. Phys. 45, 1007 (1966).
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Author Institution: Division of Physics, National Research Council of Canada, Ottawa