Relativistic Many-Body Perturbation Calculations of Boron-Like Silicon, Si X

Relativistic multireference many-body perturbation theory has been employed to calculate the energies of levels in the 2s n 1 2p n 2 3 l ( l = 0–2) and 2s n 1 2p n 2 4 l ( l = 0–3) configurations of boron-like silicon (Si X) to high accuracy. Synthetic spectra based on theoretical electric dipole transition probabilities and wavelengths are compared with laboratory spectra in order to identify EUV and soft-x-ray spectral lines.