Optical properties of europium compounds of the formulae: Eu(NCS)3·2[N4(CH2)6]· 8H2O and Eu(NO3)3·2[N4(CH2)6]·10H2O

The scintillation mechanism in LuAlO3:Ce is in the main based on radiative recombination of lectron-hole pairs via Ce3+. Although there are favorable conditions for a nonradiative energy transfer to Ce3+ from excitons responsible for host emission, in fact this process is insignificant. Results of spectroscopic experiments and detailed analysis of emission pulse shapes are presented to support this statement.