Spectra,Ionization Potentials Of Highly-stripped Ions With High Z And X-ray Line-Formation Processes In The L-shell Iron Ions

The X-ray spectra emitted from laser-produced plasmas contains plentiful information. It is a powerful tool to carry out plasmas diagnosis and study the formation and evolution of the plasmas. It plays a significant role in the field of Inertial Confinement Fusion (ICF). In this paper, the structures, spectra and ionization potentials (IP) of highly ionized ions with high Z are discussed, and pertinent atomic physics processes, ionic abundance, the X-ray line-formation mechanism and contribution from Fe L-shell plasmas are analyzed in details theoretically.Firstly, the El transition wavelengths and oscillator strengths for highly ionized atoms (z=49-82) of Ni-like 3p-4s, 3p-4d, 3d-4p and 3d-4f are calculated by the Multi-Configurations Dirc-Fock method, and the refined structure wavelength transitions of highly-ionized ions with high Z are studied according to this method, then a comparatively complete X-ray spectrum for Ni-like high Z is constituted.Secondly, the ground-state ionization potentials from Lithium-like to Neon-like isoelectronic sequences (Z: 37-82) are calculated systematically by using of MCDF method, and the effect and contribution of electron-correction energy and high-order correct are analyzed in detail, then their variational relations with Z are obtained, these shows that Breit interactions become important for the energy as the nuclear charge Z increases, but that of the QED only fluctuates around 0, then a new extrapolation formulae for IPS along an isoelectronic sequence is set up.Finally, the collisional-radiative model from the FAC(flexible atomic code) is used to simulate Fe L shell plasma consisting of Fe²⁴⁺, Fe²³⁺ and Fe²²⁺ ,which is a general application to the calculation of Fe-L shell spectrum of collisionally ionized plasma, it includes the recombination and ionization process in the line formation, a X-ray spectra from the Fe L plasmas is got, which shows the relations between X-ray wavelengths, relatively radiative intensity and the electronic temperature and density, which are important to plasmas diagnosis .