Knowledge Bank

Laser excitation spectra of the lowest vibrational levels, $v\prime \prime =2-5$ and $v\prime =0-4$, for the $Bi2X1\Sigma g+\to A0u+$ system have been recorded for a wide range of rotational levels, , at Doppler-limited resolution of $0.013cm-1$. New rotational term values and spectroscopic constants are reported, improving the accuracy of predicted line positions for high rotational levels by as much as $0.8cm-1$. In addition, Frank-Condon factors are computed and compared with experimental observations from CW laser-induced fluorescence spectra.