Effect of Matrix Composition Ratio on the Growth and Scintillation Properties of Cs2LiYCl6:Ce Crystal

Abstract

Abstract: Cs₂LiYCl₆:Ce (CLYC:Ce) is a new type of scintillation crystal with good energy resolution, high light output and excellent neutron/gamma discrimination ability. However, its complex composition results in many difficulties for crystal growth. In this paper, five different CLYC crystals with different composition ratios of LiCl accounted for 57%, 60% and 63% (mole fraction) and CsCl to YCl₃ ratios of 1.9:1 and 2.1:1 were grown using the vertical Bridgman method. It is found that optimal proportion for high quality CLYC is 60% LiCl, where the volume ratio of transparent CLYC phase to the total ingot is the largest. Changing the ratio of CsCl to YCl₃ has no obvious positive effect on crystal growth. The energy resolution of 5 mm×5 mm×5 mm and φ25 mm×10 mm samples excited by ¹³⁷Cs is 4.8% and 5.6%, respectively. The scintillation decay time of CLYC crystal under 662 keV gamma-ray excitation is 17 ns, 436 ns and 3 603 ns.

Key words: Cs₂LiYCl₆:Ce, rare earth halide, scintillation crystal, Bridgman technique, crystal growth, scintillation property

CLC Number:

O734

WANG Shaohan, WU Yuntao, LI Huanying, SHI Jian, REN Guohao. Effect of Matrix Composition Ratio on the Growth and Scintillation Properties of Cs₂LiYCl₆:Ce Crystal[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1925-1932.

References

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Effect of Matrix Composition Ratio on the Growth and Scintillation Properties of Cs₂LiYCl₆:Ce Crystal

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