Theoretical study of dielectronic recombination between electrons and heliumlike carbon ions

A revised simplified relativistic configuration-interaction method is used to study the dielectronic recombination processes of He-like carbon ions. Every resonance of type 1s2Lnl has been determined for n=2,3. The total integrated cross sections of the dielectronic recombination are in agreement with the experimental measurements within 10%. It is found that the strong resonance peak around 283 eV consists of three important doubly excited resonance states with the dominant contribution due to two (1s2p¹P)3d²F_5/2,7/2 states, in contrast to the previous assignment of (1s2p¹P)3p²S_1/2 as the dominant resonance state.