痕量La杂质对CaF2晶体γ辐照诱导色心光谱特性的影响

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (4): 571-577.

痕量La杂质对CaF₂晶体γ辐照诱导色心光谱特性的影响

王栋浩^1,2,3, 寇华敏³, 邵冲云⁴, 姜大朋³, 张博³, 王静雅³, 钱小波³, 张中晗³, 吴庆辉³, 苏良碧^1,2,3

1.中国科学技术大学稀土学院,合肥 230026;
2.中国科学院赣江创新研究院,赣州 341000;
3.中国科学院上海硅酸盐研究所,上海 201899;
4.中国科学院上海光学精密机械研究所,上海 201800

收稿日期:2023-01-10 出版日期:2023-04-15 发布日期:2023-04-28
通信作者: 寇华敏,博士,高级工程师。E-mail:huaminkou@mail.sic.ac.cn; 苏良碧,博士,研究员。 E-mail:suliangbi@mail.sic.ac.cn
作者简介:王栋浩(1997—),男,河南省人,硕士研究生。E-mail:18839929920@163.com
基金资助:
国家重点研发计划(2022YFB3605702);国家自然科学杰出青年基金(61925508);上海市科学技术委员会项目(20501110300,20511107400);中科院稳定支持基础研究领域青年团队计划(YSBR-024);中科院“一带一路”国际合作重点专项(121631KYSB20200039)

Effect of Trace La Impurities on the Spectral Properties of CaF₂ Crystals with γ-Irradiation Induced Color Centers

WANG Donghao^1,2,3, KOU Huamin³, SHAO Chongyun⁴, JIANG Dapeng³, ZHANG Bo³, WANG Jingya³, QIAN Xiaobo³, ZHANG Zhonghan³, WU Qinghui³, SU Liangbi^1,2,3

1. School of Rare Earths, University of Science and Technology of China, Hefei 230026, China;
2. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China;
3. Shanghai Institute of Ceramics, Chinses Academy of Sciences, Shanghai 201899, China;
4. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Received:2023-01-10 Online:2023-04-15 Published:2023-04-28

摘要/Abstract

摘要： 氟化钙晶体的抗γ射线辐照性能是其在太空应用的关键性能之一。本文报道了痕量La杂质对氟化钙晶体γ辐照诱导色心的影响。主要采用吸收光谱、电子顺磁共振(EPR)等手段对辐照前后存在不同痕量La杂质的氟化钙晶体进行研究。结果表明,辐照后的氟化钙晶体产生多个色心吸收带,且吸收带的吸收系数随辐照剂量和La杂质浓度增加而增加。EPR证实这种吸收带的形成是由氟化钙晶体中F心引起的,而La³⁺的存在影响氟化钙晶体F心的稳定性和光谱位置,本文提出了La³⁺与氟化钙晶体中F心存在的可能机制。

关键词: CaF₂晶体, 色心, γ辐照, La杂质, 痕量

Abstract: The resistance of calcium fluoride crystals to γ-irradiation is one of the key properties for its application in space. In this paper, the effect of trace La impurities on the γ-irradiation induced color center of calcium fluoride crystals was reported. The calcium fluoride crystals with trace La impurities were studied by absorption spectroscopy and electron paramagnetic resonance (EPR). The results show that the irradiated calcium fluoride crystals produce multiple color center absorption bands, and the absorption band increases with the increase of irradiation dose and the concentration of La impurities. EPR confirms that the formation of this absorption band is caused by the F color center in the calcium fluoride crystal. The presence of La³⁺ affect the stability and spectral position of the F centers in calcium fluoride crystals. Possible mechanisms for the presence of La³⁺ and F centers in calcium fluoride crystals are proposed.

Key words: CaF₂ crystal, color center, γ-irradiation, La impurity, trace

中图分类号:

王栋浩, 寇华敏, 邵冲云, 姜大朋, 张博, 王静雅, 钱小波, 张中晗, 吴庆辉, 苏良碧. 痕量La杂质对CaF₂晶体γ辐照诱导色心光谱特性的影响[J]. 人工晶体学报, 2023, 52(4): 571-577.

WANG Donghao, KOU Huamin, SHAO Chongyun, JIANG Dapeng, ZHANG Bo, WANG Jingya, QIAN Xiaobo, ZHANG Zhonghan, WU Qinghui, SU Liangbi. Effect of Trace La Impurities on the Spectral Properties of CaF₂ Crystals with γ-Irradiation Induced Color Centers[J]. Journal of Synthetic Crystals, 2023, 52(4): 571-577.

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痕量La杂质对CaF₂晶体γ辐照诱导色心光谱特性的影响

Effect of Trace La Impurities on the Spectral Properties of CaF₂ Crystals with γ-Irradiation Induced Color Centers

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