Laser-Induced Fluorescence and Fourier Transform Spectroscopy of the [21.9]²Δ_5/2–X²Π_3/2 (21 910 cm^-1) and the [21.9]²Δ_5/2–[.16]²Δ_5/2 (21 750 cm^-1) Transitions of NiCl

Author： Hirao T. Dufour C. Pinchemel B. Bernath P.F.

Publisher： Academic Press

ISSN： 0022-2852

Source： Journal of Molecular Spectroscopy, Vol.202, Iss.1, 2000-07, pp. : 53-58

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Abstract

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^-1) share a common [21.9]²Δ_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]²Δ_5/2–[0.16]²Δ_5/2 transition and the (0–0) band of the [21.9]²Δ_5/2–X²Π_3/2 transition. No fluorescence to a state lower in energy than the X²Π_3/2 state was observed in our experiments. We believe that we have identified the ²Π_3/2 spin–orbit component of the X²Π_i ground state and the ²Δ_5/2 spin–orbit component of the first A²Δ_i electronic state.