Knowledge Bank

The $A~1A\prime \prime (0,1,0)\leftarrow (0,0,0)$ electronic band system of DCBr has been measured in the region $11720cm-1$ to $11780cm-1$. Spectra were recorded using a transient absorption frequency modulation Ti:Sapphire $spectrometera$ incorporating a multipass Herriott-type cell for increased $sensitivity.b$ The $(K=0\leftarrow K=1)$ and $(K=1\leftarrow K=0)$ sub-bands of both isotopomers, $DC81Br$ and $DC79Br$, have been assigned and spectroscopic parameters determined. Transitions involving levels from higher K states are visible but their assignments are complicated by a variety of perturbations (vibronic, spin-orbit, coriolis, fermi resonance) involving the two singlet states and a background triplet state. Acknowledgements: The work was carried out at Brookhaven National Laboratory under Contract No. DE-AC02- 76CH00016 with the U.S. Department of Energy and supported by its Division of Chemical Sciences, Office of Basic Energy Sciences.