Theoretical Study On The Dielectronic Recombination Of Rh-like Gold And Tungsten Ions

The study of dielectronic recombination（DR） and related atomic process is a important topic in atomicphysics. In recent years,the need for applied rese arch, the DR process of 4d/4f complex structure ions have been extensively pursued,Detailed study of various effects and channel contribution in DR process is of extremely importance to get an accurate DR rate coefficient.In this paper,we based on the theory of relativity（Hartree Fock） theoretical calculations have been made for dielectronic recombination rate coefficients of Au³⁴⁺ ions and W²⁹⁺ ions.Influence of excitation and radiation channels, configuration interactions, the effect of decays to autoionizing levels possibly followed by radiative cascades（DAC） are analyzed for DR rate coefficients. In present calculation, the DR rate coefficients from j=（4p⁶4d⁸）^-1nln’l’（n>6） and from decays to nl（n>7） subshells are neglected.The contribution from CI for individual intermediate doubly excited state is significant at intermediate and high temperature, but it can be neglected in calculation for total DR rate coefficient.DAC effects have an influence on the DR rate coefficient and the maximum value for Au³⁴⁺ions is up to 12.0% for the W²⁹⁺ ions,13.7%.So the de-excitation cascade must be taken into account in the present calculations. In addition, the total DR rate coefficient is greater than either the RR or TBR rate coefficients in 1ev-50 kev.Therefore, DR process is extremely important for the plasmaionized distribution and levels population and spectra simulation and so on. In order to facilitate simple a pplications,the total DR rate coefficients for the ground state and the first excited state are fitted to an empirical formula,The simulated and calculated valuesare in good agreement.