Transition parameters of Li-like ions (Z=7-11) in dense plasmas

The energy levels, transition energies, transition probabilities, weighted oscillator strengths, and line strengths of Li-like ions (Z=7-11) in dense plasmas are investigated in this work. The relativistic effects and electron correlation effects are described by the MCDHF method. The ion sphere model is applied to include the dense plasma screening effect. The ground configuration \text1s^2\text2s and the excited \text1s^2\text2p, \text1s^23l (l=0-2) are considered. The configuration sets are enlarged until n=7 where the calculated energy levels have converged. The critical free electron densities of \text1s^2\text3d states are estimated. Except for \text1s^2\text3s-\text1s^2\text3p transitions, the transition energies for \Delta n = 0 increase, and for \Delta n \neq 0 decrease with increasing free electron densities. For \text1s^2\text3s-\text1s^2\text3p transitions, the spectra show blue-shift at lower free electron densities and red-shift at higher free electron densities, and the energy level crossing phenomens are observed at higher free electron densities.