24 September 2007 Barium iodide single-crystal scintillator detectors
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Abstract
We find that the high-Z crystal Barium Iodide is readily growable by the Bridgman growth technique and is less prone to crack compared to Lanthanum Halides. We have grown Barium Iodide crystals: undoped, doped with Ce3+, and doped with Eu2+. Radioluminescence spectra and time-resolved decay were measured. BaI2(Eu) exhibits luminescence from both Eu2+ at 420 nm (~450 ns decay), and a broad band at 550 nm (~3 μs decay) that we assign to a trapped exciton. The 550 nm luminescence decreases relative to the Eu2+ luminescence when the Barium Iodide is zone refined prior to crystal growth. We also describe the performance of BaI2(Eu) crystals in experimental scintillator detectors.
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Nerine J. Cherepy, Nerine J. Cherepy, Giulia Hull, Giulia Hull, Thomas R. Niedermayr, Thomas R. Niedermayr, Alexander Drobshoff, Alexander Drobshoff, Stephen A. Payne, Stephen A. Payne, Utpal N. Roy, Utpal N. Roy, Yunlong Cui, Yunlong Cui, Ajanta Bhattacharaya, Ajanta Bhattacharaya, Melissa Harrison, Melissa Harrison, Mingsheng Guo, Mingsheng Guo, Michael Groza, Michael Groza, Arnold Burger, Arnold Burger, } "Barium iodide single-crystal scintillator detectors", Proc. SPIE 6706, Hard X-Ray and Gamma-Ray Detector Physics IX, 670616 (24 September 2007); doi: 10.1117/12.738973; https://doi.org/10.1117/12.738973
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