INFRARED DIODE LASER SPECTROSCOPY OF FUNDAMENTAL AND HOT BANDS OF BBr ($X^{1}\Sigma^{+}$)
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Date
1998
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Ohio State University
Abstract
Infrared absorption spectra of $^{11}B^{79}Br, ^{11}B^{81}Br, ^{10}B^{79}Br$ and $^{10}B^{81}Br$ have been observed between 650 and $720 cm^{-1}$ in a $BBr_{3}/He$ ac discharge using diode laser spectroscopy. Over 200 lines consisting of both fundamental and hot bands up to $v^{\prime \prime} = 5$ have been fitted to Dunham expansions. The fitted parameters are used to derive the vibrational constants of $^{11}B^{79}Br, \omega_{e} = 685.1844(17) cm^{-1}$ and $\omega_{e}x_{e} = 3.7347(11) cm^{-1}$. The equilibrium dissociation energy is also obtained from expanded Dunham-Morse potential, $D_{e} = 32647(49) cm^{-1}$.
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Author Institution: Department of Chemistry, Uiversity of Cambridge