Color centers and charge state change in Ce:YAG crystals grown by temperature gradient techniques

Dong, Yongjun; Zhou, Guangyong; Xu, Jun; Zhao, Guangjun; Su, Fenghua; Su, Liangbi; Liu, Hongjun; Si, Jiliang; Qian, Xiaobo; Li, Xiaoqing; Jiong, Shen

doi:10.1016/j.jcrysgro.2005.09.029

Cited by 33 publications

(16 citation statements)

References 18 publications

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“…The process can be expressed as follows: In Fig. 2(b), there is another absorption peak at 370 nm, which arose from the F centers [14]. In a reducing atmosphere, oxide crystals are apt to form anion vacancies.…”

Section: Resultsmentioning

confidence: 99%

Characteristics and optical spectra of V:YAG crystal grown in reducing atmosphere

Zhang

Liu

et al. 2006

Journal of Crystal Growth

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Section: Resultsmentioning

confidence: 99%

Characteristics and optical spectra of V:YAG crystal grown in reducing atmosphere

Zhang

Liu

et al. 2006

Journal of Crystal Growth

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“…The weak absorption band at 305 nm is also observed in the absorption spectra. The 305 nm band in YAG:Ce crystals has been studied by Zeng et al [23] and others [26][27][28] in detail. They reported that it was attributed to F-type color centers (these O 2À vacancies can trap one electron or two electrons and became F-type centers (F, F þ , etc.…”

Section: Absorption Spectra Of Luyag:cementioning

confidence: 98%

Crystal growth and optical properties of LuYAG:Ce single crystal

Jiang

Xia

et al. 2012

Journal of Crystal Growth

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“…Calculations in subsection 3.1 show that the F and F + center concentrations are high of order 10 17 cm −3 . In addition, according to our previous study [21], the concentration of the V-type centers is very small. Impurities such as Cr 3+ or Fe 3+ existing in the crystal would also form electron traps after γ-irradiation.…”

Section: Tl Process Analysis and Kinetic Modelmentioning

confidence: 66%

Thermoluminescence of Al2O3 crystals grown by temperature gradient techniques

et al. 2013

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Color center concentrations of the Al 2 O 3 crystal grown by temperature gradient techniques were calculated from Gaussian fits to absorption spectra. The concentrations for F-and F + -centers at 204, 232, and 255 nm were determined to be 1.361×10 17 , 0.098×10 17 , and 0.325×10 17 cm −3 , respectively. Studies have shown that the thermoluminescence (TL) glow curve exhibits a prominent 450 K peak that matches well the first-order fitting curve. The thermal activation energy E and frequency factor s of the trap were determined to be 0.94456±0.00545 eV and 5.8703×10 11 s −1 . With this theoretical analysis, a simple one-trap/one-center TL model is presented to provide a theoretical explanation of the TL process. In this paper we present calculations of the color-center concentrations of the Al 2 O 3 crystals grown under a reducing atmosphere by temperature gradient techniques (TGTs). The TL glow curve, which was different from that of previous reports, was also analyzed by first-order kinetic curve fitting. Based on the fitted parameters, a simple model was developed to enable a theoretical analysis of experimental TL data.

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Color centers and charge state change in Ce:YAG crystals grown by temperature gradient techniques

Cited by 33 publications

References 18 publications

Characteristics and optical spectra of V:YAG crystal grown in reducing atmosphere

Characteristics and optical spectra of V:YAG crystal grown in reducing atmosphere

Crystal growth and optical properties of LuYAG:Ce single crystal

Thermoluminescence of Al2O3 crystals grown by temperature gradient techniques

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