Vibrational level populations in the autoionization of oxygen

Autoionization from the I and I′ resonance series of O2 has been reexamined using high resolution for photons and electrons. Photoelectron spectra on the resonances are predicted from the upper potential energy surface parameters and photoionization yield curve alone, without reference to the uncertain line shapes and widths. Bond lengths are determined as 1.370±.005 Å in I and 1.380±.005 Å in I′ of O2.