High-Resolution Fourier Transform Infrared Emission Spectra of Barium Monofluoride

✍ Scribed by B. Guo; K.Q. Zhang; P.F. Bernath

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 800 KB
• Volume: 170
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1056

✦ Synopsis

The high-resolution infrared emission spectra of gas-phase barium monofluoride have been observed by Fourier transform spectrometry. Vibration-rotation bands were analyzed for the three most abundant isotopomers (\left({ }^{138} \mathrm{BaF}\right.), from 1-0 to 12-11: ({ }^{137} \mathrm{BaF}), from 1-0 to (5-4 ;{ }^{136} \mathrm{BaF}), from 1-0 to 4-3) of the ground (X^{2} \Sigma^{+})state. The Dunham coefficients, (Y_{l m}), have been derived for all three isotopomers by fitting about 1750 lines for ({ }^{138} \mathrm{BaF}), about 270 lines for ({ }^{1.77} \mathrm{BaF}), and about 70 lines for ({ }^{136} \mathrm{BaF}) to the traditional Dunham model. In addition, the mass-reduced Dunham constants. (U_{l m}), have been calculated from a global least-squares fit. (ci) 1995 Academic Press. Inc