Fourier transform emission spectroscopy of the F4Δ-X4Φ system of TiF

The emission spectra of TiF have been reinvestigated in the 4200-15 000 cm−1 region using the Fourier transform spectrometer associated with the National Solar Observatory at Kitt Peak. TiF was formed in a microwave discharge lamp operated with 2.5 Torr of He and a trace of TiF4 vapor, and the spectra were recorded at a resolution of 0.02 cm−1. The TiF bands observed in the 12 000-14 000 cm−1 region have been assigned to a new transition, F4Δ-X4Φ. Each band consists of four sub-bands assigned as, 4Δ1/2-4Φ3/2, 4Δ3/2-4Φ5/2, 4Δ5/2-4Φ7/2, and 4Δ7/2-4Φ9/2. A rotational analysis of the 0-1, 0-0, and 1-0 bands has been obtained and spectroscopic constants have been extracted.