Laser-Induced Fluorescence and Fourier Transform Spectroscopy of the [21.9]2Δ5/2–X2Π3/2 (21 910 cm−1) and the [21.9]2Δ5/2–[.16]2Δ5/2 (21 750 cm−1) Transitions of NiCl

✍ Scribed by T. Hirao; C. Dufour; B. Pinchemel; P.F. Bernath

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 154 KB
• Volume: 202
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2000.8111

✦ Synopsis

The visible spectrum of NiCl consists of a large number of bands. Laser-induced fluorescence experiments have shown that two intense transitions (21 910 and 21 750 cm Ϫ1 ) share a common [21.9] 2 ⌬ 5/2 upper electronic state. High-resolution Fourier transform spectroscopy has allowed the rotational analysis of the (0 -0), (1-0), and (0 -1) bands of the [21.9] 2 ⌬ 5/2 -[0.16] 2 ⌬ 5/2 transition and the (0 -0) band of the [21.9] 2 ⌬ 5/ 2 -X 2 ⌸ 3/ 2 transition. No fluorescence to a state lower in energy than the X 2 ⌸ 3/ 2 state was observed in our experiments. We believe that we have identified the 2 ⌸ 3/2 spin-orbit component of the X 2 ⌸ i ground state and the 2 ⌬ 5/2 spin-orbit component of the first A 2 ⌬ i electronic state.