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5 results on '"Kaicheng Ma"'

2. The homogeneity study on (Ce,Gd)3Ga2Al3O12 Crystal Scintillators Grown by the Optical Floating Zone Method and Traveling Solvent Floating Zone Method

Author

Tong Wu, Ling Wang, Yun Shi, Qian Zhang, Yifei Xiong, Qiang Yuan, Tongtong Li, Kaicheng Ma, Hui Wang, Jinghong Fang, Jinqi Ni, He Huan, Zhenzhen Zhou, Qian Liu, Jianding Yu, and Jun Zou

Subjects
General Materials Science, General Chemistry, Condensed Matter Physics
Abstract

1 at. % Ce3+ doped Gd3Ga2Al3O12 (GGAG) single crystals were grown by optical floating zone (OFZ) method and traveling solvent floating zone (TSFZ) method, respectively. To reveal their structure and...

Published
2023
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3. Ce

Author

Yifei, Xiong, Yun, Shi, Haibo, Wang, Qian, Zhang, Tong, Wu, Qiang, Yuan, Kaicheng, Ma, Tongtong, Li, Zhenzhen, Zhou, Jinghong, Fang, Huan, He, Jinqi, Ni, Qian, Liu, Jiangding, Yu, Sheng, Cui, Oleg, Shichalin, and Eugeniy, Papynov

Abstract

Ce

Published
2022

5. Ce3+, Pr3+ Co-Doped Lu3Al5O12 Single Crystals and Ceramics: A Comparative Study

Author

Yifei Xiong, Yun Shi, Haibo Wang, Qian Zhang, Tong Wu, Qiang Yuan, Kaicheng Ma, Tongtong Li, Zhenzhen Zhou, Jinghong Fang, Huan He, Jinqi Ni, Qian Liu, Jiangding Yu, Sheng Cui, Oleg Shichalin, and Eugeniy Papynov

Subjects
Ce, Pr:LuAG, optical floating zone method, scintillator ceramics, garnet, single crystals, General Materials Science
Abstract

Ce3+, Pr3+ co-doped Lu3Al5O12 (Ce, Pr:LuAG) single crystals and ceramics were prepared using the optical floating zone (OFZ) and reactive vacuum sintering methods, respectively. The microstructure, photo- (λex = 450 nm), and radio-luminescence (under X-ray excitation) performance, as well as scintillation light yield (LY, under γ-ray, 137Cs source) of both materials, were investigated and compared. Ce, Pr:LuAG ceramics had an in-line transmittance of approximately 20% in the visible light range, while the analogous crystals were more transparent (~65%). The X-ray excited luminescent (XEL) spectra showed the characteristic Ce 3+ and Pr3+ emissions located at 310 nm, 380 nm, and 510 nm. The highest LY of the Ce, Pr:LuAG ceramics reached 34,112 pho/MeV at 2 μs time gate, which is higher than that of a single crystal. The ratio of LY values (LY2/LY0.75) between shaping times of 0.75 μs and 2 μs indicated a faster scintillation decay of ceramics regarding single crystals. It was ascribed to the lower effective concentration of luminescent activators in single crystals because of the coefficient segregation effect.

Published
2022
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