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Proceedings Paper

Studies on Ca2+-doped CeBr3 scintillating materials
Author(s): Paul Guss; Michael E. Foster; Bryan M. Wong; F. Patrick Doty; Kanai Shah; Michael R. Squillante; Urmila Shirwadkar; Rastgo Hawrami; Josh Tower; Ding Yuan
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Paper 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.

Paper Details

Date Published: 26 September 2013
PDF: 10 pages
Proc. SPIE 8854, Penetrating Radiation Systems and Applications XIV, 885406 (26 September 2013); doi: 10.1117/12.2021342
Show Author Affiliations
Paul Guss, National Security Technologies Inc., LLC (United States)
Michael E. Foster, Sandia National Labs. (United States)
Bryan M. Wong, Sandia National Labs. (United States)
F. Patrick Doty, Sandia National Labs. (United States)
Kanai Shah, Radiation Monitoring Devices, Inc. (United States)
Michael R. Squillante, Radiation Monitoring Devices, Inc. (United States)
Urmila Shirwadkar, Radiation Monitoring Devices, Inc. (United States)
Rastgo Hawrami, Radiation Monitoring Devices, Inc. (United States)
Josh Tower, Radiation Monitoring Devices, Inc. (United States)
Ding Yuan, National Security Technologies Inc., LLC (United States)


Published in SPIE Proceedings Vol. 8854:
Penetrating Radiation Systems and Applications XIV
Gary P. Grim; H. Bradford Barber, Editor(s)

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