Synthèse et caractérisation des matériaux de scintillation nano−composites à base des polymères

Abstract

In this work, we developed scintillator materials in the form of polycrystalline Gd2SiO5 powders doped 2% with the rare-earth ion cerium )Ce3+( and composite scintillators based on different polymer matrices )polystyrene, polymethyl methacrylate and polylactic acid(. The physicochemical characteristics of the synthesized samples were studied using the following characterization techniques: X-ray diffraction )X-ray diffraction( which reveals a combination of the crystalline structure of luminophore nanoparticles and the amorphous structure of polymers, scanning differential calorimetry )DSC( which allowed us to study the effect of the introduction of nanoparticles on the Tg of the polymer matrix as well as on the crystallization and fusion of semi-crystalline PLA and stationary photoluminescence )PL( which shows the luminescence intensity of polycrystalline powders and composite films with different matrices of polymer.