The Spectrum of Indium Oxide

Abstract

A rather complex spectrum of InO lying between the two In resonance lines at 4102A and 4511A is described. Most of the band heads are assigned to a $^{2}\ensuremath{\Pi}\ensuremath{\rightarrow}^{2}\ensuremath{\Sigma}$ system with the frequencies of the main (${R}_{2}+{Q}_{2}?$) heads given by the formula $\ensuremath{\nu}=23,595.10+626.66({v}^{\ensuremath{'}}+\frac{1}{2})\ensuremath{-}3.40{({v}^{\ensuremath{'}}+\frac{1}{2})}^{2}\ensuremath{-}703.09({v}^{\ensuremath{'}\ensuremath{'}}+\frac{1}{2})+3.71{({v}^{\ensuremath{'}\ensuremath{'}}+\frac{1}{2})}^{2}+0.285{({v}^{\ensuremath{'}\ensuremath{'}}+\frac{1}{2})}^{3}$. ${\ensuremath{\nu}}_{e}$ for the other spin component is at 23,033.10. The large cubic term causes rapid convergence of the few band sequences giving rise to prominent "tail" bands.