Laser velocity modulation spectroscopy of TiCl+: Observation of the A 3Δ(3d2) state and deperturbation of the X 3Φ−A 3Δ complex
作者:C. Focsa、B. Pinchemel、J.-L. Féménias、T. R. Huet
DOI:10.1063/1.475313
日期:1997.12.22
A single mode cw dye laser along with velocity modulation was used to record weak bands of TiCl+ in the spectral region 17 100–18 600 cm−1. The ions were produced in the positive column of an ac glow discharge with a gas mixture of He/TiCl4. These new bands have been identified as linking the upper already known [17.8]3Δ(3d4s) state to respectively the X 3Φ(v=1) state and to a newly observed A 3Δ(v=0) state located 350 cm−1 above the X 3Φ(v=0) state. As suggested by Focsa et al. (J. Chem. Phys. 106, 9044 (1997)) the A 3Δ(3d2) state was found to be responsible for the perturbations observed in the X 3Φ(3d2) state. The spin-orbit components of the A 3Δ(v=0) and the X 3Φ(v=1) states revealed interaction leading to homogeneous and heterogeneous perturbations. A set of deperturbed parameters has been determined with the help of a full matrix-based handling of the A 3Δ(v=0) and the X 3Φ(v=0,1) states. Study of the contributions of the basis functions to the eigenvectors of the diagonalized matrix displayed evidence of a reversal of the leading character of the Ω=3 spin-orbit components of the A 3Δ(v=0) and the X 3Φ(v=1) states. A remarkable example of avoided crossing has been observed between the A 3Δ1(v=0) and the X 3Φ2(v=1) spin-orbit components.