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Infrared Diode Laser Spectroscopy of Fundamental and Hot Bands of BBr (X1Σ+)

✍ Scribed by N.T. Hunt; W.Y. Fan; Z. Liu; P.B. Davies

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
184 KB
Volume
191
Category
Article
ISSN
0022-2852

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✦ Synopsis

Infrared absorption spectra of the four common isotopic forms of the transient molecule BBr ( 11 B 79 Br, 11 B 81 Br, 10 B 79 Br, and 10 B 81 Br) have been observed in natural abundance. The spectra were detected in the region between 650 and 720 cm Ϫ1 using diode laser spectroscopy of a BBr 3 /He ac discharge. Over 150 lines consisting of both fundamental and hot bands up to v Љ ϭ 5 have been fitted to Watson's isotopically invariant coefficients (U kl ). Spectroscopic parameters for each isotopomer could be derived from these coefficients; for 11 B 79 Br, e ϭ 685.1892(15) cm Ϫ1 and e x e ϭ 3.73632(95) cm Ϫ1 . The equilibrium dissociation energy obtained from Dunham's expanded Morse potential is 32 711(43) cm Ϫ1 .

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