Average Distribution of Ionic Charges and Ionizability for the Au Plasma System

Using relativistic multi-configuration Dirac-Fock theory, we calculate the transition data of 3d_j-nf_j' (n = 5,6,7) for the M-shell from an Ni-like Au ion to an As-like Au ion by the GRASP programme with the core-polarization, quantum electrodynamical effect and Breit correction. Based on the present calculation results and the experiment of Xingguang-II laser facilities, the average distribution of ionic charge and the ionizability have been derived. The average ionization degree of Au plasma Z^* is 49.06±0.5, which is comparable with the result of the Lawrence Livemore National Laboratory.