Dielectronic recombination and electron collisional excitation in high-Z plasmas

In this paper, the quasi-relativistic Hartree-Fock-Relativistic atomic structure code and the unresolved transition array model were used to calculate the dielectronic recombination rate and the electron-ion collisional excitation rate of two high-Z elements:Au and Ta. The calculated results show that for 3d10-3d94l5f-3d104l dielectronic recombination of Ni-like gold ion and 3d104l-3d94l5f electron collisional excitation of Cu-like gold ion, the dielectronic recombination rates tend to rise and the collisional excitation rates tend to fall when electron temperature increases. Furthermore, electron collisional excitation contributes more to the line emission of 5f-3d transition than dielectronic recombination.