坩埚下降法生长的大尺寸BaF_(2)∶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 BaF_(2)∶Y Scintillation Crystals Grown by Bridgman Method

作　　者：侯越云 刘建强 杨蕾 闫晋力[1] 张明荣[1] 刘晓阳 HOU Yueyun;LIU Jianqiang;YANG Lei;YAN Jinli;ZHANG Mingrong;LIU Xiaoyang(Beijing Glass Research Institute Co.,Ltd.,Beijing 101111,China;Beijing Scitlion Technology Co.,Ltd.,Beijing 101111,China)

机构地区：[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

出　　处：《人工晶体学报》2023年第4期584-589,共6页Journal of Synthetic Crystals

摘　　要：本文使用垂直坩埚下降法制备了40 mm×40 mm×350 mm的BaF_(2)∶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%。BaF_(2)∶Y晶体的抗辐照性能差于BaF_(2)晶体,经过累积剂量辐照后,BaF_(2)∶Y晶体对波长300 nm光的吸收明显增强。The 40 mm×40 mm×350 mm BaF_(2)∶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 2100 ph/MeV,and the optimal energy resolution at 662 keV is 10.1%.After 60 Co 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 BaF_(2)∶Y crystal is worse than that of BaF_(2) crystal.After the accumulative dose irradiation,the absorption of BaF_(2)∶Y crystal to 300 nm light is significantly enhanced.

关 键 词：BaF_(2)∶Y 闪烁晶体 坩埚下降法 光输出 辐照损伤 能量分辨率 

分 类 号：O734[理学—晶体学] O782