Laser and Fourier transform emission spectroscopy of the G(4)Phi-Chi(4)Phi system of TiF

The emission spectrum of the G(4) Phi-X-4 Phi transition of TiF has been observed in the region 13 500-16 000 cm(-1) using a Fourier transform spectrometer (FTS), as well as by laser excitation spectroscopy. In the FTS experiments the bands were excited in a carbon tube furnace by the reaction of titanium metal vapor with CF4 at a temperature of about 2300 degrees C. In the laser experiments the TiF molecules were produced by laser vaporization of a Ti rod followed by reaction with SF6 using a pulsed supersonic jet source. Three groups of bands with high-wavenumber subband heads at 14 388, 15 033, and 15 576 cm(-1) have been assigned as 0-1, 0-0, and 1-0 vibrational bands of the G(4) Phi-X-4 Phi transition, respectively. Each vibrational band consists of four subbands assigned as (4) Phi(3/2)-(4) Phi(3/2), (4) Phi(5/2)-(4) Phi(5/2), (4) Phi(7/2)-(4) Phi(7/2), and (4) Phi(9/2)-(4) Phi(9/2). A rotational analysis has been performed and molecular constants for the ground and excited states have been extracted using the combined FTS and laser excitation measurements. The correspondence between the electronic states of TiF, TiH, and Ti+ has also been discussed. (C) 1997 Academic Press.