The corrected Gramm-Schmidt method is employed in 3-splined fitting of photoionization cross sections which was calculated in the authors previous work.In the case of LTE approximation,photon and free electron are assumed to be in Planck and Maxwell distribution respectively.The present derivation shows that,the rate coefficients of photoionization and radiative recombination can be described analytically in terms of 3-splined fitting parameters.This formulation is applied to He-like Rb and He-like Nb ions,and some of the results are figured out and analysed.By means of averaging over initial states and summing over final states,the degeneration of rate coefficients that concern the level level transitions is analysed explicitely.With the attained result, comparison and evaluation have been made to the formula given by reference[1].

The mean-free-path for photon energy flux is calculated with the three temparature model in the NON-LTE system;The electron occupation probabilities P_i are obtained by solving the rate equations;The results of numerical simulation for aluminum plasma are given with comparision and discussion.

Effects of condguration mixing and relativistic corrections on the dielectronic satellite spectra have been studied for the He-like ions with low-and medium-Z. The atomic Parameters characterizing the dielectronic satellite lines are evaluated by using the send-and non-relativistic Hartree-Fock models. The results calculated show that (1) configuration mixing has an important effect on the dielectronic satellite spectra for the He-like ions, and (2) for the medium-Z He like ions, it is no longer sufficient that the effects of relativity are considered in the form of perturbation energy corrections, and in order to obtain more accurutc numerical results, relativistic corrections should be made both for energy and for radial wavefunction.

e propose a method of target-shooting which can be applied to solve th temperature-density dependent Thomas-Fermi equation. The convergence of this method is also discussed. The procedure of adjusting test parameters for calculations is given in detail. As examples, results of the calculations for Fe and Rb elements are presented.

The GRASP program based on the multi-configuration Dirac-Fock self-consistent method have been extended and revised, so 15 configurations which consist of 89 energy levels in Ne-like titanium ions can be calculated in the same self-consistent process.In the calculations, the averaged level (AL) model and the Fermi two-parameter distribution model of the nuclear volume effect are considered, also Breit correction, vacuum polarization and self-energy effect are counted. LS and jj coupling labels are determined by the maximum combination coefficients. Electric dipole, electric quadrupole and magnetic dipole transition probabilities and oscillator strengths are calculated. The results of oscillator strengths are given in both the Coulomb and the Babushkin gauge, and the electro-dipole oscillator strengths in Babushkin gauge are also compared with the nonrelativistic counterpart.