The band spectrum of SbO: A new doublet system

Abstract

The band spectrum of SbO was excited in a heavy current discharge from a 2000 volt D. C. generator. A new doublet system of bands occurring in the region λ 2800 toλ 3600 arising from a transition of the type²Δ_r−² Π _r was identified. The lower² Π _r state is found to be common to those of the three band systems reported earlier, which is in all probability the ground state of the SbO molecule. The band heads of the high frequency and low frequency components could be represented by the following quantum formulae:

$$\begin{gathered} ^2 \Delta _{\tfrac{3}{2}} - ^2 \Pi _{\tfrac{1}{2}} : \hfill \\ v = 29754 \cdot 6 + 570 \cdot 6 (v' + \tfrac{1}{2}) - 3 \cdot 52 (v' + \tfrac{1}{2})^2 - 820 \cdot 5 (v'' + \tfrac{1}{2}) + 4 \cdot 62 (v'' + \tfrac{1}{2})^2 \hfill \\ ^2 \Delta _{\tfrac{5}{2}} - ^2 \Pi _{\tfrac{3}{2}} : \hfill \\ v = 28044 \cdot 8 + 568 \cdot 1 (v' + \tfrac{1}{2}) - 3 \cdot 28 (v' + \tfrac{1}{2})^2 - 819 \cdot 2 (v'' + \tfrac{1}{2}) + 4 \cdot 62 (v'' + \tfrac{1}{2})^2 . \hfill \\ \end{gathered} $$

The possibility of the existence of another brief system is indicated.