R. Visser et al., ENERGY-LEVELS OF THE CEFNNN CENTER IN BAF2 AND IMPLICATIONS FOR THE CERIUM EXCITATION KINETICS, Journal of luminescence, 60-1, 1994, pp. 983-986
Energy levels have been calculated for several cerium centers in alkal
ine earth halides. Here we focus on the CeF(nnn) center in BaF2. Using
the calculated levels it is explained that free electron and hole cap
ture at the stable Ce3+F(nnn) center is not an efficient way of exciti
ng this center.