It is interesting to notice that theratio between the intensity of these 2 bands significantly changesin the SrO glass when the concentration of the MPs increaseswhereas it changes only slightly in the CaO glasses. This seemsto indicate that the local structure around the Eu2+ions changesin the SrO glasses when the concentration of MPs increases.Therefore, we suspect a larger number of Eu2+ions to diffusein the glass matrix in the SrO glass than in the CaO glass. Acomplete study of the UV excited and persistent luminescenceproperties of those glasses is ongoing and will be publishedseparately.