Relativistic effects of oscillator strengths for Na-like ions

The relativistic and non-relativistic self-consistent-field methods were utilized to calculate the 3s-np, 3p-ns and 3p-nd excitation energies and oscillator strengths for Na-like ions (atomic number was 11~92). The relativistic effects for the M-shell transitions were discussed by comparing the relativistic results with the non-relativistic ones. It is found that the relativistic effects mainly affect the excitation energies for n=3 transitions and the effects on line strengths (or transitions matrix elements)are small. However, the relativistic effects influence both excitation energies and line strengths for n>3 transitions, and in most cases, the influence on line strengths is stronger. The results are important for calculating the opacities in the research on inertial confinement fusio