Functional Polymeric Coatings for CsI(Tl) Scintillators

Coatings

Ubaldo Coscia¹  Gianfranco Carotenuto²  Angela Longo²  Mariano Palomba²  Giuseppe Nenna³ 

[1] Department of Physics ‘Ettore Pancini’, University of Naples ‘Federico II’, Via Cintia, I-80126 Napoli, NA, Italy;Institute for Polymers, Composites and Biomaterials (IPCB-CNR), National Research Council, Piazzale E. Fermi 1, I-80055 Portici, NA, Italy;Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Research Centre Portici, Piazzale E. Fermi 1, I-80055 Portici, NA, Italy;

关键词: optical-grade epoxy;    inorganic scintillator;    alkali metal halides;    adhesion;    interface;    Coulomb forces;   

DOI  :  10.3390/coatings11111279

来源: DOAJ

【 摘 要 】

The handling of inorganic scintillators (e.g., alkali metal halides) can benefit from the availability of polymeric materials able to adhere to their surface. Polymeric materials, such as epoxy resins, can act as protective coatings, as adhesives for photodiodes to be connected with the scintillator surface, and as a matrix for functional fillers to improve the optical properties of scintillators. Here, the optical properties of two epoxy resins (E-30 by Prochima, and Technovit Epox by Heraeus Kulzer) deposited on the surface of a scintillator crystal made of CsI(Tl) were investigated, in order to improve the detection of high-energy radiation. It is found that these resins are capable of adhering to the surface of alkali metal halides. Adhesion, active at the epoxy–CsI(Tl) interface, can be explained on the basis of Coulomb forces acting between the ionic solid surface and an ionic intermediate of synthesis generated during the epoxy setting reaction. Technovit Epox showed higher transparency, and it was also functionalized by embedding white powdered pigments (PTFE or BaSO₄) to achieve an optically reflective coating on the scintillator surface.

【 授权许可】

Unknown