Fourier transform emission spectroscopy of the TiF radical in the 407Â nm region

Ultraviolet emission spectra of the TiF radical in the 407 nm region have been observed at a resolution of 0.04 cm−1 using a Fourier transform spectrometer. A new electronic assignment of 4Γ-X4Φ has been proposed. Rotational analysis has been obtained for the 0-0 and 1-1 vibrational bands of the 4Γ5/2-X4Φ3/2, 4Γ9/2-X4Φ7/2, and 4Γ11/2-X4Φ9/2 subbands and the 0-0 band of 4Γ7/2-X4Φ5/2. The lower state rotational and centrifugal distortion constants are consistent with the previous results [J. Mol. Spectrosc. 184 (1997) 186; J. Chem. Phys. 119 (2003) 9496], to the conformation that the lower state of the 407 nm band is the 4Φ ground electronic state. Rough estimates of the vibrational interval ΔG(1/2) and the spin-orbit coupling constant A in the 4Γ state were also obtained.