Dipole excitation, ionization and fragmentation of N₂and CO in the 10-60 eV region

Dipole oscillator strengths for absorption and for formation of parent and fragment ions of N 2 and CO in the energy range of 10-60 eV have been obtained, using techniques of energy-loss electron spectroscopy and electron-ion coincidence. A quantitative collection has been made of the fragment ions regardless of their initial kinetic energy. An analysis of the data, leads to partial oscillator strengths for a variety of dissociative processes involving excitations of two-electron states and deep valence-shell states. In addition, the branching of some of these dissociative states of CO + over the various fragmentation channels is reported. Evidence is presented for the validity of the 'shake-up' model which has been used in calculating relative intensities of the C 2 Sigma + states with respect to those of the B 2 Sigma + states of the two molecules.