Crystal Growth and Scintillation Luminescence Properties of Ti:Al2O3 Crystals Grown with Kyropoulos Method

Abstract

Abstract: Large-sized Ti:Al₂O₃ crystals with the weight of 115 kg were grown successfully by Kyropoulos method. The grown crystals have complete shape without any cracking. Large Ti:Al₂O₃ single crystal sample with diameter of 300 mm was prepared. The scintillation luminescence properties of the grown crystals were tested under the X-ray and α particle excitation. The results show that the scintillation luminescence of Ti:Al₂O₃ crystals include near infrared band and near ultraviolet band. The near infrared emission comes from the characteristic emission of Ti³⁺, which has high efficiency and slow decay time. The near ultraviolet emission comes from Ti-localized exciton emission and F⁺center, which has the fast decay time. The light output is related to the self-absorption caused by Ti-doping. Under the excitation of the α particles, the light yield reaches up to 1 130.5 pe/MeV, and the fast component is 29.6 pe/MeV.

Key words: Ti:Al₂O₃, single crystal growth, Kyropoulos method, scintillation luminescence property

CLC Number:

WANG Qingguo, LIU Bo, LUO Ping, TANG Huili, WU Feng, KANG Sen, DUAN Jinzhu, WANG Qinfeng, XU Jun. Crystal Growth and Scintillation Luminescence Properties of Ti:Al₂O₃ Crystals Grown with Kyropoulos Method[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(4): 762-767.

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Crystal Growth and Scintillation Luminescence Properties of Ti:Al₂O₃ Crystals Grown with Kyropoulos Method

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