Abstract The rate coefficients of dielectronic recombination (DR) for Cu-like Au ion collided with the incident free electron are calculated based on the quasi-relativistic multi-configuration Hartree－Fock theory. The results clearly show that the of all recombination channels exhibits resonance characters with electron temperature. At lower temperatures, the recombination for electrons caused by 4s excitation is dominant through outer electron radiative transitions among the intermediate doubly excited autoionizing levels, in which the most components come from 3d5pns states, whereas with increasing electron temperature, DR caused by 3d excitation turns out to be dominant, and the contribution from the 3d4s4fnf state to the total rate coefficient of electron 3d is the largest with cms at an electron temperature of keV. Under this condition, there exists a strong competition between the two types of recombination channels.
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