High-resolution bolometric spectroscopy of NO2 in the region of 13352 cm(-1)

The vibronic band at 13352 cm(-1) of NO2 is measured up to the hyperfine structure by bolometric detection. The excited vibronic state involved is a hybrid state having a major contribution from the electronic ground state. This follows from the hyperfine splitting of the K- = 0 and K- = I stacks as well as from the value of the rotational constant A'. The anomalous intensity distribution induced by rovibrational interactions is not observed in the vibronic band analysed here. Although we suggest the absence of rovibronic interactions of significant strength, we underline the presence of vibronic interactions in the vibronic band analysed here. (C) 1997 Elsevier Science B.V.