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The BaI X2Σ+ and B2Σ+ Electronic States Through B2Σ+–X2Σ+ and C2Π–X2Σ+ Band Systems Analysis

✍ Scribed by R.F. Gutterres; J. Vergès; C. Amiot

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
379 KB
Volume
196
Category
Article
ISSN
0022-2852

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✦ Synopsis

The near-infrared spectrum of the B 2 ⌺ ϩ -X 2 ⌺ ϩ band system of the BaI molecule, obtained from the chemiluminescent reaction Ba ϩ I 2 and also by laser-induced fluorescence (LIF), was recorded by using Fourier transform spectroscopy (FTS). The LIF spectra were obtained by using a Ti:sapphire single-mode laser excitation. Resolved rotational data, originating from 32 vibrational levels (0 Յ v Յ 31) in the X 2 ⌺ ϩ state and from 24 vibrational levels (0 Յ v Յ 19, and v ϭ 21, 22, 23, 26) in the B 2 ⌺ ϩ state, were used in the final analysis. Previously recorded data for the C 2 ⌸-X 2 ⌺ ϩ band system (with ⌬v ϭ 0), taken from C. A. Leach, A. A. Tsekouras, and R. N. Zare, J. Mol. Spectrosc. 153, 59 -72 (1992), were added to the present work data field. Accurate and improved molecular constants for the X 2 ⌺ ϩ , B 2 ⌺ ϩ , and C 2 ⌸ states were derived from a simultaneous treatment of the whole data set.

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