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# FOURIER TRNSFORM SPECTROSCOPY OF BaO: ANALYSIS OF $A^{1}\Sigma^{+} - X^{1}\Sigma^{+}$ CHEMILUMINESCENCE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19942

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 Title: FOURIER TRNSFORM SPECTROSCOPY OF BaO: ANALYSIS OF $A^{1}\Sigma^{+} - X^{1}\Sigma^{+}$ CHEMILUMINESCENCE Creators: Li, Hongzhi; Focsa, Cristian; Pinchemel, Bernard; Bernath, P. F.; Le Roy, Robert J. Issue Date: 2000 Abstract: The $A^{1}\Sigma^{+} - X^{1}\Sigma^{+}$ emission spectrum of BaO from a Broida-type oven was revisited using a Fourier transform spectrometer. A total of 82 vibrational bands of $^{138} BaO$ were measured in the range of 8.900 to $21.000 cm^{-1}$ at a resolution of $0.004 cm^{-1}$. The vibrational quantum number of the Ground state was observed up to $u^{\prime\prime} = 20$ and up $\nu^{\prime} = 11$ for the excited A state. In addition, 72 bands $from^{138}$ BaO, $^{136}$Bao and $^{135}$BaO isotopomers were also measured, Over 15,000 rotational lines were analyzed at a precision of about $0.005 cm^{-1}$. Significantly improved spectral constants for the ground state are obtained. URI: http://hdl.handle.net/1811/19942 Other Identifiers: 2000-WF-07