The dissociative photoionization of hydrogen via two-electron excitation at 27.5 eV and 30.5 eV

Abstract
The kinetic energy spectra of the protons produced in the dissociative photoionization of H2 directed predominantly along the E vector of a photon beam have been measured at photon energies of 27.5 and 30.5 eV. Protons arising from autoionization of the lowest two-electron excited states (1 Sigma +u) exhibit an energy distribution which, unlike previous experimental results, is in accord with theory.