Two-electron processes in ionization of molecular hydrogen

Abstract

Cross sections for double ionization and ionization plus excitation of H 2 by high-energy charged particles are calculated as a function of the orientation of the H 2 internuclear axis. The contributions of the double-collision process, and the shake-off or shake-up processes have been considered. The results are compared with the data of Edwards et al. [Phys. Rev. A 42 (1990) 1367, A 43 (1991) 2586, A 44 (1991) 797, A 46 (1992) 6970]. The theoretical and measured cross sections have the same magnitude, and shake-off/up is more important than double collision in the considered energy interval.