Observation of TiF+by Velocity Modulation Laser Spectroscopy and Analysis of the [17.6]3Δ–X3Φ System

✍ Scribed by C. Focsa; B. Pinchemel; D. Collet; T.R. Huet

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 341 KB
• Volume: 189
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1998.7545

✦ Synopsis

The molecular ion TiF+ has been observed for the first time using high-resolution spectroscopy. The ions were produced in the positive column of an AC glow discharge with a gas mixture of He/TiF4. A single-mode cw dye laser along with the velocity modulation detection technique was used to record an absorption spectrum in the spectral region 16 800-18 600 cm-1. The observed system was assigned to the 0-0 and 1-1 bands of the [17.6]3Delta-X3Phi transition of TiF+. The rotational analysis of the main subbands has been performed up to J values equal to 77 and 56 for the 0-0 and 1-1 bands, respectively. Despite a careful search, no intercombination band was observed. A set of effective molecular parameters has been determined, characterizing the v = 0, 1 levels of the [17.6]3Delta and X3Phi states. The spin-orbit constants Ae and the vibrational constants omegae, omegaexe have been estimated for both electronic states, as well as their equilibrium distances Re (1.7509 and 1.7800) Å for the [17.6]3Delta and X3Phi states, respectively). Copyright 1998 Academic Press.