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Stable growth of (Ce,Gd)GaAlO crystal scintillators by the traveling solvent floating zone method

CrystEngComm, ISSN: 1466-8033, Vol: 24, Issue: 11, Page: 2050-2056
2022
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Article Description

CeGdGaAlO (Ce:GGAG) single crystals were successfully grown by the traveling solvent floating zone method (TSFZ). A series of compositions, where the mole ratio is GdO : AlO = 25 : 75, 27 : 73, 29 : 71, were investigated as solvents. The 25 mol% GdO-75 mol% AlO solvent component was found to be the most effective in stabilizing the molten zone to obtain a crystal rod with uniform diameter. The crystal cracks were relieved clearly due to the improved molten zone stabilization during the crystal growth process. XRD patterns of the obtained crystals prove the garnet structure without any evident second phase. The characteristic Ce emission located at around 540 nm was presented in the photoluminescence and X-ray excited luminescence spectra. The scintillation light yield reaches up to 34 132 pho MeV and scintillation decay time was optimized to 64 ns with a high fast decay component of about 85%. The TSFZ method demonstrated the growth feasibility of Ce:GGAG crystals that have an incongruent-melting trend with lower Ga/Al ratio in the compositions.

Bibliographic Details

Tong Wu; Ling Wang; Yun Shi; Tianzhao Xu; Hui Wang; Jinghong Fang; Jinqi Ni; Huan He; Chaoyue Wang; Zhenzhen Zhou; Qian Liu; Qin Li; Jianding Yu; Xintang Huang; Bo Wan; Mei Yang; Huanying Li; Yuntao Wu; Oleg Shichalin; E. K. Papynov

Royal Society of Chemistry (RSC)

Chemistry; Materials Science; Physics and Astronomy

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