坩埚下降法生长的大尺寸BaF2:Y闪烁晶体的闪烁性能及辐照损伤研究

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (4): 584-589.

坩埚下降法生长的大尺寸BaF₂:Y闪烁晶体的闪烁性能及辐照损伤研究

侯越云¹, 刘建强², 杨蕾¹, 闫晋力¹, 张明荣¹, 刘晓阳²

1.北京玻璃研究院有限公司,北京 101111;
2.北京首量科技股份有限公司,北京 101111

收稿日期:2022-10-31 出版日期:2023-04-15 发布日期:2023-04-28
作者简介:侯越云(1987—),男,河北省人,高级工程师。E-mail:houyueyun@bgri.com

Scintillation Properties and Irradiation Damage of Large Size BaF₂:Y Scintillation Crystals Grown by Bridgman Method

HOU Yueyun¹, LIU Jianqiang², YANG Lei¹, YAN Jinli¹, ZHANG Mingrong¹, LIU Xiaoyang²

1. Beijing Glass Research Institute Co., Ltd., Beijing 101111, China;
2. Beijing Scitlion Technology Co., Ltd., Beijing 101111, China

Received:2022-10-31 Online:2023-04-15 Published:2023-04-28

摘要/Abstract

摘要： 本文使用垂直坩埚下降法制备了40 mm×40 mm×350 mm的BaF₂:5%Y(摩尔分数)晶体,并对晶体样品进行了掺杂含量、闪烁性能、光学性能和辐照损伤的研究。距离籽晶端0~300 mm范围内的Y³⁺掺杂浓度(摩尔分数)为5.1%±0.9%。晶体样品的平均光输出为2 100 ph/MeV,在662 keV处的最优能量分辨率为10.1%。经⁶⁰Co放射源辐照累积剂量1 Mrad后,样品在波长220 nm处的透过率由辐照前的87.3%下降至83.5%,在波长300 nm处的透过率由91.8%下降至89.9%。BaF₂:Y晶体的抗辐照性能差于BaF₂晶体,经过累积剂量辐照后,BaF₂:Y晶体对波长300 nm光的吸收明显增强。

关键词: BaF₂:Y, 闪烁晶体, 坩埚下降法, 光输出, 辐照损伤, 能量分辨率

Abstract: The 40 mm×40 mm×350 mm BaF₂:5%Y (mole fraction) crystals were grown by vertical Bridgman method. The doping content, scintillation properties, optical properties and irradiation damage of crystal samples were studied. The Y³⁺doping concentration (mole fraction) is 5.1%±0.9% within the range from 0 to 300 mm from seed end. The average light output of crystal sample is 2 100 ph/MeV, and the optimal energy resolution at 662 keV is 10.1%. After ⁶⁰Co source was used to irradiate the sample with an accumulated dose of 1 Mrad, the transmittance of the sample at 220 nm wavelength decreases from 87.3% before irradiation to 83.5%, the transmittance at 300 nm wavelength decreases from 91.8% to 89.9%. The anti-irradiation performance of BaF₂:Y crystal is worse than that of BaF₂ crystal. After the accumulative dose irradiation, the absorption of BaF₂:Y crystal to 300 nm light is significantly enhanced.

Key words: BaF₂:Y, scintillation crystal, Bridgman method, light output, irradiation damage, energy resolution

中图分类号:

O734
O782

侯越云, 刘建强, 杨蕾, 闫晋力, 张明荣, 刘晓阳. 坩埚下降法生长的大尺寸BaF₂:Y闪烁晶体的闪烁性能及辐照损伤研究[J]. 人工晶体学报, 2023, 52(4): 584-589.

HOU Yueyun, LIU Jianqiang, YANG Lei, YAN Jinli, ZHANG Mingrong, LIU Xiaoyang. Scintillation Properties and Irradiation Damage of Large Size BaF₂:Y Scintillation Crystals Grown by Bridgman Method[J]. Journal of Synthetic Crystals, 2023, 52(4): 584-589.

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坩埚下降法生长的大尺寸BaF₂:Y闪烁晶体的闪烁性能及辐照损伤研究

Scintillation Properties and Irradiation Damage of Large Size BaF₂:Y Scintillation Crystals Grown by Bridgman Method

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