Physical Review A
It has recently been suggested that a radiative correction of relative order ln may contribute to the 1s2sS13-1s2S01 magnetic dipole transition of the heliumlike ions. The low-frequency contributions to the correction are evaluated and shown to vanish. © 1974 The American Physical Society.
Drake, Gordon W. F.. (1974). Leading radiative correction to the magnetic dipole transition probability. Physical Review A, 9 (6), 2799-2801.