Studies on Ca2+-doped CeBr3 scintillating materials

Paul Guss; Michael E. Foster; Bryan M. Wong; F. Patrick Doty; Kanai Shah; Michael R. Squillante; Urmila Shirwadkar; Rastgo Hawrami; Josh Tower; Ding Yuan

doi:10.1117/12.2021342

26 September 2013 Studies on Ca²⁺-doped CeBr₃ scintillating materials

Paul Guss, Michael E. Foster, Bryan M. Wong, F. Patrick Doty, Kanai Shah, Michael R. Squillante, Urmila Shirwadkar, Rastgo Hawrami, Josh Tower, Ding Yuan

Author Affiliations +

Proceedings Volume 8854, Penetrating Radiation Systems and Applications XIV; 885406 (2013) https://doi.org/10.1117/12.2021342
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Despite the outstanding scintillation performance characteristics of cerium tribromide (CeBr₃) and cerium-activated lanthanum tribromide (LaBr₃:Ce), their commercial availability and application is limited due to the difficulties of growing large, crack-free single crystals from these fragile materials. The objective of this investigation was to employ aliovalent doping to increase crystal strength while maintaining the optical properties of the crystal. One divalent dopant (Ca²⁺ ) was investigated as a dopant to strengthen CeBr₃ without negatively impacting scintillation performance. Ingots containing nominal concentrations of 1.9% of the Ca²⁺ dopant were grown. Preliminary scintillation measurements are presented for this aliovalently doped scintillator. Ca²⁺-doped CeBr₃ exhibited little or no change in the peak fluorescence emission for 371 nm optical excitation for CeBr₃. The structural, electronic, and optical properties of CeBr₃ crystals were investigated using the density functional theory within generalized gradient approximation. The calculated lattice parameters are in good agreement with the experimental data. The energy band structures and density of states were obtained. The optical properties of CeBr₃, including the dielectric function, were calculated.

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Paul Guss, Michael E. Foster, Bryan M. Wong, F. Patrick Doty, Kanai Shah, Michael R. Squillante, Urmila Shirwadkar, Rastgo Hawrami, Josh Tower, and Ding Yuan "Studies on Ca²⁺-doped CeBr₃ scintillating materials", Proc. SPIE 8854, Penetrating Radiation Systems and Applications XIV, 885406 (26 September 2013); https://doi.org/10.1117/12.2021342

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