Electric-field singlet-triplet anticrossings of the 1snd configurations of He-3 atoms

摘要

We calculated the electric-field splitting of the 1snd D-1 and D-3 levels of the He-3 I spectrum-for n = 3, 4,and 5 and,evaluated the anticrossings of singlet and triplet Stark substates. The anticrossing spectra observable, after selective excitation of singlet states with. asymmetric charge and current distributions are discussed. The anticrossing spectra of He-3 I differ significantly from those of He-4 I due to the hyperfine interaction and, therefore, provide a valuable means for investigations on collisional excitation of He atoms. [References: 15]