Crystal growth and characterization of europium doped KCaI3, a high light yield scintillator |
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| Affiliation: | 1. New Industry Creation Hatchery Center (NICHe), Tohoku University, Japan;2. Institute for Materials Research, Tohoku University, Japan;3. C&A corporation, Japan;1. New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aramaki, Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan;2. Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;3. Institute of Physics AS CR, 10 Cukrovarnicka, Prague 6, 16200 Czech Republic;4. C&A Corporation, 6-6-40, Aramaki, Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan;1. Scintillation Materials Research Center, University of Tennessee, Knoxville, TN, USA;2. Bredesen Center, University of Tennessee, Knoxville, TN, USA;3. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA;4. Department of Nuclear Engineering, University of Tennessee, Knoxville, TN, USA;5. Agile Technologies, Knoxville, TN, USA;1. Scintillation Materials Research Center, University of Tennessee, Knoxville, TN, United States;2. Materials Science and Engineering Department, University of Tennessee, Knoxville, TN, United States;3. Nonproliferation and National Security Department - Brookhaven National Laboratory, Upton, NY, United States;1. Scintillation Materials Research Center, University of Tennessee, Knoxville, TN 37996, USA;2. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA;3. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;4. Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beihang University, Beijing 100191, China;5. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;6. Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, TN 37996, USA;7. Department of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996, USA;1. Scintillation Materials Research Center, University of Tennessee, Knoxville, TN, USA;2. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA;3. Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA |
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| Abstract: | The presented study reports on the spectroscopic characteristics of a new high performance scintillation material KCaI3:Eu. The growth of ∅ 17 mm boules using the Bridgman–Stockbarger method in fused silica ampoules is demonstrated to produce yellow tinted, yet transparent single crystals suitable for use in spectroscopic applications due to very promising performance. Scintillation light yield of 72,000 ± 3000 ph/MeV and energy resolution of 3% (FWHM) at 662 keV and 6.1% at 122 keV was obtained from small single crystals of approximately 15 mm3. For a much larger 3.8 cm3 detector, 4.4% and 7.3% for the same energy. Proportionality of the scintillation response to the energy of ionizing radiation is within 96% of the ideal response over an energy range of 14–662 keV. The high light yield and energy resolution of KCaI3:Eu make it suitable for potential use in domestic security applications requiring radionuclide identification. |
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| Keywords: | Scintillator Metal halide Single crystal growth Bridgman technique Gamma-ray detection |
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