Rotational Structure of the Schumann-Runge Bands of Oxygen in the Vacuum Region

Absorption bands of the Schumann-Runge system of oxygen have been photographed with a 3-meter vacuum spectrograph in the region $\lambda 1760-\lambda 1925$. A rotational analysis yields constants for the upper states which are new in the range $v^{\prime }=8\mathrm{} \mathrm{to} 15$ inclusive. Origins of the bands in this progression are represented within the limits of accuracy of the observations by the following equation: ${\nu }_{(v^{\prime }, 0)}=49,014.93+700.360(v+\frac{1}{2})-8.0023\mathrm{}{(v+\frac{1}{2})}^2-0.37535\mathrm{}{(v+\frac{1}{2})}^3.$ The energy of dissociation, ${D_0}^{\prime \prime }$, is 5.05 volts.