Relativistic Multichannel Theory: Theoretical Study of C⁺ Autoionization States

Based on relativistic multichannel theory, the autoionization states of C⁺ are studied. We calculate all the autoionization states in the energy region of 193900 ～ 231700cm^-1, and the results are in good agreement with experimental data. The energy structure we obtain will be important in the dielectronic recombination processes, which play a key role to determine the abundance of carbon in a nebula.