Simultaneous Ionization and Dissociation of Oxygen and Intensities of the Ultra-violetO2+Bands

Observations by Hogness and Lunn, Smyth and Stueckelberg, showing that ${\mathrm{O}}^{+}$ is formed from the neutral molecule by a single impact of about 20 volts, are explained from the potential energy curves of the molecule and ion. These have been obtained from a method given by P. M. Morse, and from the empirical law ${r_0}^3{\omega }_0=3000\mathrm{}\mathrm{A}$ ${\mathrm{cm}}^{-1\mathrm{}}$. The intensities of the ultra-violet ${\mathrm{O}}_2^{+}$ bands have been calculated from the same curves and are in good agreement with experiment.