Wavelength-resolved laser-induced fluorescence study of the A2Π-X2Σ transition of ZrN:: vibrational constants of A2Π and X2Σ states

The (1,1) and (2,2) bands of the A (2)Pi-X (2)Sigma transition of ZrN between 5620 and 5891 Angstrom have been studied using wavelength-resolved laser-induced fluorescence spectroscopy. Transitions from upsilon = 1, 2 of the A (2)Pi state to upsilon = 0, 1, 2 of the X (2)Sigma state have been observed and assigned. The vibrational spacing, Delta G(1/2), of the A (2)Pi and X (2)Sigma states of (ZrN)-Zr-90 have been measured to be 958 and 995 cm(-1), respectively. The observed ground-state X (2)Sigma vibrational frequency is in good agreement with values determined from matrix isolation spectroscopy. The upper-state vibrational frequency is reported for the first time. The ground-state vibrational constants of (ZrN)-Zr-92 and (ZrN)-Zr-94 have also been determined. (C) 1998 Published by Elsevier Science B.V. All rights reserved.