Laser Spectroscopy of TiO: Accurate Term Energies for the Singlet States and Ligand Field Assignment of States in the Range 0 to 4 eV

✍ Scribed by L.A. Kaledin; J.E. Mccord; M.C. Heaven

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 477 KB
• Volume: 173
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1252

✦ Synopsis

The wavelength-resolved fluorescence excitation technique has been used to record the ((2,0)) band of the (C^{3} \Delta_{3}-a^{1} \Delta) transition, and the ((2,3)) and ((2,4)) bands of the (C^{3} \Delta_{3}-X^{3} \Delta_{3}) electronic transition of (\mathrm{TiO}) at a resolution of (0.03 \mathrm{~cm}^{-1}). These data were combined with a previous highresolution analysis of the (C^{3} \Delta-X^{3} \Delta) system (T. Gustavsson, C. Amiot, and J. Verges, J. Mol. Spectrosc. 145, 56-65, 1991) to obtain accurate term energies for the singlet states of TiO. The term energy for the first excited (a^{1} \Delta) state is (T_{0}\left(a^{1} \Delta\right)=3444.367 \pm 0.020 \mathrm{~cm}^{-1}). This value differs significantly from the previously derived value of (T_{0}\left(a^{1} \Delta\right)=3448.33 \pm 0.04 \mathrm{~cm}^{-1}) (A. I. Kobylyanskii, A. N. Kulikov, and L. V. Gurvich. Opt. Spectrosc. 54, 254-255, 1983). Ligand field theory models were used to analyze the electronic structures of TiO. TiS, and (\mathrm{TiCl}^{+}). @ 1995 Academic Press. Inc.