The no-phonon luminescence at 0.84 eV in GaAs:Cr-the Zeeman splitting

Abstract
In a previous paper the authors proposed an interpretation of the fine structure of the no-phonon luminescence at 0.84 eV as arising from transitions at a substitutional Cr2+ ion on a Ga site subjected to a perturbation of C3v symmetry, and built a theoretical model. They now use this model in order to predict the Zeeman splittings; they observe good agreement with experiments.