Abstract
The a 3Σ + u ( a 11 u) → X 1Σ + g ( X0 + g) near-infrared transition of Bi 2, which was recently observed in the thermal emission spectrum of bismuth vapor by Barrow et al. (Chem. Phys. Lett. 214, 293-296, 1993), has been found in the spectrum of the chemiluminescence from the reaction of bismuth vapor and microwave-discharged oxygen in a fast-flow system. The spectrum consisting of 21 short sequences of red-degraded bands was measured at high resolution with a Fourier-transform spectrometer. Vibrational and rotational analysis of the bands have yielded molecular constants of the a 11 u and X0 + g states which are in good agreement with the data of Barrow et al.
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