M1 and E2 transitions in the ground-state configuration of atomic manganese

Using the multiconfiguration Hartree-Fock approximation within the framework of the Breit-Pauli Hamiltonian (MCHF+BP) and the relativistic Hartree-Fock (HFR) approximation, we have calculated the forbidden transition (M1 and E2) parameters such as transition energies, logarithmic weighted oscillator strengths and transition probabilities between the fine-structure levels in the ground-state configuration of 3d⁵4s² for atomic manganese (Mn I, Z = 25). A discussion of these calculations for manganese using MCHF+BP and HFR methods is given here. (author)