Isoelectronic wavelength predictions for magnetic-dipole, electric-quadrupole, and intercombination transitions in the Mg sequence

Precise wavelength predictions are presented for the 3s3p3P1–3s3p3P2 magnetic-dipole transitions, the 3s3p3P0–3s3p3P2 electric-quadrupole transitions, and the 3s2 1S0–3s3p3P1 intercombination lines for all members of the Mg isoelectronic sequence with Z ≤ 45. Magnetic-dipole and intercombination transitions of this type have recently been observed in tokamak spectra and have applications for localized diagnostics in high-temperature plasmas. The predictions are based on interpolations and extrapolations of empirical regularities, which also provide insights into the dynamics of these atomic systems.