Relativistic study ofE1andM1transitions in the boron isoelectronic sequence

The relativistic transition energies and electric-dipole oscillator strengths in length and velocity forms are calculated for ions of the boron sequence. Transitions from the $2s2p^2$, $J=\frac{1}{2}, \frac{3}{2}, \mathrm{and} \frac{5}{2}$ excited states to the $2s^{2}2p$, $J=\frac{1}{2} \mathrm{and} \frac{3}{2}$ levels of the ground state are considered. The magnetic-dipole transition studied relativistically is that between the $J=\frac{1}{2} \mathrm{and} \frac{3}{2}$ levels of the ground state. The trends in the relative importance of relativistic contributions and correlation effects along the isoelectronic sequence for the different transitions are discussed. A more detailed study of the various effects contributing to the excitation energies and oscillator strengths of Fe xxii, and comparison with other available results for this ion is carried out.