X-ray Line-Formation Processes In The L-shell Aluminium Ions

The x-ray spectroscopy of plasmas has received much attention over the past few years due to its extensive applications in exploding wire experiments, laser plasmas, particle beam-foil interactions, astrophysics, and plasma diagnostics. Theoretical analyses of the radiation emission from these plasmas are of great use for the understanding of the plasmas energetics and determination of plasma parameters from spectral diagnostics. Several models have been developed in an effort to understand various aspects of aluminum plasmas emissions, concentrating on K-shell ions, and some L-shell and M-shell ions.FAC(flexible atomic code) is a newly developed atomic package, a relativistic, multi-configurational atomic code similar to HULLAC. The distorted-wave (DW) approximation is used for all continuum processes. Resonant processes such as DR and RE are treated in an independent process, isolated resonance approximation.FAC is used to simulate the spectrum of Aluminium L shell plasma in this article. Atomic processes affecting the spectrum of Li-like Aluminium are investigated using a collisional radiative model that includes the He-, Li-, and Be-like ions. The atomic processes includ radiative recombination, dielectronic recombination, collision ionization, and resonance excitation. The atomic dynamics processes also determine the ion abundance and detailed level populations.Different process affects the spectrum distinctly are investigated. The X-ray spectra from the Aluminium L shell 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.