The upper level of the transition observed at 28637 cm -1 is assigned to the 6 2 A' state, based on the computed energies and the observation that the DLIF of the 6 2 A'-𝑋 ) 1 2 A' component shows a diagonal Franck-Condon factor distribution. The broad progressions observed at lower energies reveal the mixing of the 6 2 A' state with the vibronic manifolds from lower energy electronic states. Three broad features were observed in the 20000 -26700 cm -1 range. The band maxima (near 20840, 22570 and 24860cm -1 ) were red-shifted relative to the excitation energy by 3780, 6070 and 7800 cm -1 . It is unlikely that these transitions involve low-lying electronically excited states as the theoretical calculations did not find any electronically excited states at energies below 8000 cm -1 .