Laser-induced fluorescence spectrum of nitrogen dioxide in the neighborhood of 6125 A

The resonance fluorescence spectrum of nitrogen dioxide is excited by a tunable CW dye laser in the neighborhood of 6,125 A. The rotational molecular constants for the excited electronic state are determined as A' sub v 6.60/cm + or - 0.06/cm and B' sub v = 0.454/cm + or - 0.005/cm. The band origin is at 16,322.6/cm + or - 0.8/cm. The tentative vibrational constants are estimated as Omega' sub 1 = 1378.2/cm and Omega' sub 2 = 872.3/cm, and the vibrational assignment is (0,5,0). The structure parameters deduced for this state are r=1.18 A + or - 0.01 A and Theta = 128 deg + or - 0.5 deg.