Coherent trapping of populations upon excitation by the Λ-scheme in a weak magnetic field

We have studied the influence of a constant magnetic field on the possibility of the formation of dark states and on the behavior of the alignment of an ensemble of atoms with the filled ns shell the ( n + 1) 3 S 1 state of which is excited by the Λ-scheme from states n 3 P 1 and n 3 P 2 , which, in turn, are populated by means of an axially symmetric interaction.