Preparation and Properties of Large Size Cs2LiYCl6：Ce Crystal

doi:10.16553/j.cnki.issn1000-985x.2024.0210

Abstract

Abstract: In this paper, a series of 3-inch (1 inch=2.54 cm) diameter Cs₂LiYCl₆：Ce (CLYC：Ce) crystals with LiCl molar ratios of 55%~60% were grown by vertical Bridgman method. XRD patterns of opaque initial end of the crystals show that the Li-rich group distribution ratio can effectively inhibit the generation of the Cs₃YCl₆ phase. The optimal molar ratio of LiCl for high quality CLYC is 57%, where the volume ratio of CLYC phase to the total ingot is the largest, and isometric complete length up to 80 mm. Scintillation properties such as relative light output, energy resolution and figure of merit (FOM) of 76 mm×76 mm CLYC：Ce crystal obtained under the optimal proportioning condition were tested. The results show that 4.88% energy resolution is measured at 662 keV of ¹³⁷Cs γ rays. The figure of merit (FOM) of pulse shape discrimination (PSD) measured with a ²⁴¹Am-Be neutron source is 4.18. The study indicates that CLYC：Ce crystal has excellent neutron-gamma discrimination performance.

Key words: Cs₂LiYCl₆：Ce crystal, Bridgman technique, energy resolution, pulse shape discrimination, figure of merit

CLC Number:

O782

ZHAO Meili, SUN Taofeng, GAO Fan, GONG Hongying, ZANG Xiaowei, GUI Qiang, ZHANG Chunsheng. Preparation and Properties of Large Size Cs₂LiYCl₆：Ce Crystal[J]. Journal of Synthetic Crystals, 2025, 54(4): 553-559.

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Preparation and Properties of Large Size Cs₂LiYCl₆：Ce Crystal

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