ABSTRACT
The investigations presented now are focused on the evaluation of the sign and magnitude of the ground state hyperfine splitting of Eu3+ in a crystalline environment. The first order analysis, in which just the contributions caused by the electric quadrupole hyperfine interactions are evaluated is extended by the second-order terms that originate from the coupling of two distinct physical mechanisms. Namely, as mentioned at the end of the previous chapter, it is expected that the interactions via the crystal field potential are of the greatest importance.
