Growth and Scintillation Characterization of CsI-LiCl Eutectic Material by Bridgman Method

Abstract

Abstract: CsI-LiCl and CsI-LiCl:Na eutectic scintillators were successfully grown in a vacuum-sealed quartz crucible by vertical Bridgman method. The periodic lamellar microstructure of the crystal was observed by SEM with the CsI phase of 5 μm thickness. The X-ray excitation luminescence spectra show that the luminescence of CsI-LiCl and CsI-LiCl:Na eutectic is mainly attributed to the oxygen induced defects luminescence. And the STE luminescence of pure CsI is observed in the CsI-LiCl eutectic. Full energy peak is observed in the α particle excited multi-channel energy spectrum of CsI-LiCl eutectic, which indicates that the eutectic has potential thermal neutron detection ability.

Key words: scintillator, CsI, LiCl, eutectic, Bridgman method, neutron, detection

CLC Number:

YAN Xinlong, SHI Zhaoji, PENG Chen, WANG Rui, YANG Fan. Growth and Scintillation Characterization of CsI-LiCl Eutectic Material by Bridgman Method[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(3): 410-415.

References

[1] YANAGIDA T, KAWAGUCHI N, FUJIMOTO Y, et al.Basic study of europium doped LiCaAlF₆ scintillator and its capability for thermal neutron imaging application[J]. Optical Materials, 2011, 33(8): 1243-1247.
[2] FLOYD C E Jr, BENDER J E, SHARMA A C, et al. Introduction to neutron stimulated emission computed tomography[J]. Physics in Medicine and Biology, 2006, 51(14): 3375-3390.
[3] GUO C, MA X H, WANG Z M, et al.Neutron beam tests of CsI(Na) and CaF₂(Eu) crystals for dark matter direct search[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016, 818: 38-44.
[4] LEE D W, STONEHILL L C, KLIMENKO A, et al.Pulse-shape analysis of Cs₂LiYCl₆:Ce scintillator for neutron and gamma-ray discrimination[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012, 664(1): 1-5.
[5] NAGARKAR V V, OVECHKINA E, BHANDARI H, et al.Lithium alkali halides-new thermal neutron detectors with n-γ discrimination[C]//2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC). October 27-November 2, 2013, Seoul, South Korea. IEEE, 2013: 1-4.
[6] DINCA L E, DORENBOS P, DE HAAS J T M, et al. Alpha-gamma pulse shape discrimination in CsI:Tl, CsI:Na and BaF₂ scintillators[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002, 486(1/2): 141-145.
[7] YASUI N, OHASHI Y, KOBAYASHI T, et al.Development of phase-separated scintillators with light-guiding properties[J]. Advanced Materials, 2012, 24(40): 5464-5469.
[8] DEN T, SAITO T, HORIE R, et al.Phase-separated CsI-NaCl scintillator with optical guiding function[J]. IEEE Transactions on Nuclear Science, 2013, 60(1): 16-19.
[9] YANAGIDA T, KAWAGUCHI N, FUJIMOTO Y, et al.Scintillation properties of LiF-SrF₂ and LiF-CaF₂ eutectic[J]. Journal of Luminescence, 2013, 144: 212-216.
[10] YOKOTA Y, KUROSAWA S, NISHIMOTO K, et al.Growth and luminescent properties of Ce-doped LiF/LiLuF₄ eutectic fibers grown by micro-pulling-down method[J]. Journal of the European Ceramic Society, 2014, 34(9): 2095-2099.
[11] NISHIMOTO K, YOKOTA Y, KUROSAWA S, et al.Crystal growth of LiF/LiYF₄ eutectic crystals and their luminescent properties[J]. Journal of the European Ceramic Society, 2014, 34(9): 2117-2121.
[12] WU Y T, LUKOSI E D, ZHURAVLEVA M, et al.A novel LiCl-BaCl₂:Eu²⁺ eutectic scintillator for thermal neutron detection[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015, 797: 319-323.
[13] KUROSAWA S, YAMAJI A, PEJCHAL J, et al.Growth of LiF/LiBaF₃ eutectic scintillator crystals and their optical properties[J]. Journal of Materials Science, 2017, 52(10): 5531-5536.
[14] KAWAGUCHI N, KIMURA H, TAKEBUCHI Y, et al.Dosimetric properties of non-doped LiF/CaF₂ eutectic[J]. Radiation Measurements, 2020, 132: 106254.
[15] ORIGUCHI K, YOKOTA Y, KRAL R, et al.Phase diagram of BaI₂-LuI₃ system and growth of BaI₂/LuI₃ eutectic scintillator[J]. Journal of Crystal Growth, 2020, 536: 125573.
[16] WU Z, YANG B, TOWNSEND P D.Radioluminescence and thermoluminescence properties of X-ray-irradiated pure CsI[J]. Journal of Luminescence, 2008, 128(7): 1191-1196.
[17] MIKHAILIK V B, KAPUSTYANYK V, TSYBULSKYI V, et al.Luminescence and scintillation properties of CsI: a potential cryogenic scintillator[J]. Physica Status Solidi (b), 2015, 252(4): 804-810.
[18] ANTONYAK O T, VISHNEVSKII V N, PIDZYRAILO N S, et al.Luminescent properties of LiCl-Cu single crystals[J]. Soviet Physics Journal, 1974, 17(8): 1158-1161.
[19] JAEGLÉ P, SEBBAN S, CARILLON A, et al.Ultraviolet luminescence of CsI and CsCl excited by soft X-ray laser[J]. Journal of Applied Physics, 1997, 81(5): 2406-2409.
[20] DANIEL D J, KIM H J, KIM S, et al.Thermoluminescence kinetic features of Lithium Iodide (LiI) single crystal grown by vertical Bridgman technique[J]. Optical Materials, 2017, 70: 120-126.