Fourier transform spectroscopy of the BaI molecule: Simultaneous analysis of seven electronic states including the D-2 Sigma(+) and the G(2)Sigma(+) states

In this work, the BaI D(2)Sigma (+) and G(2)Sigma (+) electronic states wer e investigated using laser-induced fluorescence (LIF) and Fourier transform spectroscopy (FTS). The LIF visible spectra were obtained by using the sec ond harmonic of the Ti:sapphire single-mode laser and the Ar+ and Kr+ multi mode lasers as excitation sources. Previously recorded data, taken from C. A. Leach, A. A. Tsekouras, and R. N. Zare (1992, J. Mol. Spectrosc. 153, 59 -72) and from R. F. Gutterres, J. Verges, and C. Amiot (1999, d. Mol. Spect rosc. 196, 29-44: 2000, J. Mol. Spectrosc. 200, 253-260; and 2000, J. Mol. Spectrosc. 201, 326-327) were combined with the present data. Accurate and improved molecular constants for the X(2)Sigma (+). B(2)Sigma (+). A'(2)Del ta, A(2)Pi, C(2)Pi. and D(2)Sigma (+) states and 16 term values of the G(2) Sigma (+) stare were derived from a simultaneous treatment of the whole dat a set (12 684 transitions) with a standard deviation of 3.26 x 10(-1) cm(-1 ). (C) 2001 Academic Press.