Oscillator strengths for transitions from 3s4sand 3s4plevels calculated in the magnesium sequence, MgI–MnXIVusing the multiconfiguration optimized potential model

Oscillator strengths for downward transitions from the 3 s 4 p and 3 s 4 s levels in the Magnesium isoelectronic sequence are reported. These, as well as lifetimes for these levels, have been calculated for Mg I to Mn XIV using the Multiconfiguration Optimized Potential Model (MCOPM) with inclusion of relativistic corrections. Generally, the level splittings are reasonably accurate but at certain level crossings - occurring near S v and C1 VI - considerable energy level accuracy is required to ensure accurate relativistic mixing coefficients and transition rates. Corrections have been applied to the energies in these cases.