Stoßdissoziation von H 2 + -Ionen

Inelastic collisions between the hydrogen molecule ion and the hydrogen molecule leading to dissociation are investigated experimentally in the energy range between 3 and 20 keV. The velocity distributions of the protons produced in these processes are compared with calculated distributions using a Born approximation formula. The calculation takes into account the excitation of the 2pσ _u state of the H ₂ ⁺ and a possible simultaneous excitation of the target. It can be shown, that the quantitative knowledge of these processes makes possible a satisfying explanation of the measured distributions. In general a good agreement is obtained between theory and experiment concerning both energy and angular dependence of the velocity distributions.