Abstract

The influence of the molecular orientation on the multiple ionization of N2 and O2 was studied in collisions with highly charged Xe-ions at velocities of 0.2–0.3 and ≈15 a.u. The applied technique is based on a position- and time-sensitive multi-particle detector which allows to determine the ionization cross-section as a function of the orientation of the molecular axis. At lower collision energies, e.g. in collisions with 360 keV Xe18+, no anisotropy was found, whereas in collisions with 770 MeV Xe18+ significant orientation effects appear at higher degrees of ionization.

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