Using multi-configuration Dirac-Fock method and the corresponding packages GRASP92 and RATIP, as well as the newly developed RERR06, we have calculated the radiative recombination (RR) spectra for capturing a continuum electron into n| (n=4—8, l=0—3) subshell of Ni-like Au51+, Cu-like Au50+ and Zn-like Au49+ ions and their corresponding radiative decay spectra. The calculated RR spectra reproduce the experimental spectra excellently. It was found that for the Ni-like Au51+, Cu-like Au50+ and Zn-like Au49+ ions, the probability of capturing a free electron to n=4 subshell is the largest. Furthermore, the main characteristics of the relative decay spectra is the domination of the lines from the captured electrons radiatively decaying from the n=4 subshell.