  We report on experimental results obtained from collisions of slow highly
charged Ar9+ ions with a carbon monoxide dimer (CO)2 target. A COLTRIMS setup
and a Coulomb explosion imaging approach are used to reconstruct the structure
of the CO dimers. The three dimensional structure is deduced from the 2-body
and 3-body dissociation channels from which both the intermolecular bond length
and the relative orientation of the two molecules are determined. For the
3-body channels, the experimental data are interpreted with the help of a
classical model in which the trajectories of the three emitted fragments are
numerically integrated. We measured the equilibrium intermolecular distance to
be Re = 4.2 A. The orientation of both CO molecules with respect to the dimer
axis is found to be quasi-isotropic due to the large vibrational temperature of
the gas jet.

Atomic and Molecular Clusters