Orientation Effect in Transfer Ionization Processes of 50 keV/u Ne⁸⁺ Impact on CO

The fragmentations of CO²⁺ are studied in transfer ionization processes of 50 keV/u Ne⁸⁺ impact on CO with reaction microscopes. The 3D momenta of C⁺ and O⁺ were measured, and the kinetic energy release (KER) of dissociative(CO²⁺) was obtained accordingly. The peaks resulted from the metastable states of ¹Σ⁺, ¹Π and ³Π, of ³Σ⁺, and of ¹Σ_(II)⁺ are identified in KER spectrum. Meanwhile, the repulsive state of ³Σ^- was also observed, which forms a broad peak lying between the peaks of ³Σ⁺ and ¹Σ_(II)⁺. In the CO²⁺ dissociations from ³Σ^- state, the orientation effect of CO molecular axis was observed for the first time.