人工晶体学报, 2020, 49 (5): 780, 网络出版: 2020-08-06
RbY2Cl7∶Ce晶体的生长和闪烁性能研究
Growth and Scintillation Properties of RbY2Cl7∶Ce Crystal
闪烁晶体 坩埚下降法 能量分辨率 衰减时间 scintillation crystal RbY2Cl7∶Ce RbY2Cl7∶Ce Bridgman method energy resolution decay time
摘要
采用坩埚下降法,在真空密封的石英坩埚中成功生长出复合稀土卤化物RbY2Cl7∶Ce单晶。此晶体属于正交晶系,晶胞参数为: a=1.274 69 nm,b=0.693 02 nm,c=1.266 55 nm。熔点为617 ℃。表征了该晶体的X射线光致激发-发光光谱、激发发射光谱、γ射线多道能谱及激发衰减曲线等闪烁性能。RbY2Cl7∶Ce的激发-发射光谱显示发射峰在389 nm左右,激发峰在336 nm左右。在137Cs源的γ射线激发下能量分辨率约为9.8%,闪烁衰减时间约为35 ns。
Abstract
The rare earth halide single crystal of RbY2Cl7∶Ce was successfully grown in quartz ampoules by Bridgman method. The crystal of RbY2Cl7∶Ce crystallizes in orthorhombic structure and the cell parameters were determined to be: a=1.274 69 nm, b=0.693 02 nm, c=1.266 55 nm. The melting point is 617 ℃. X-ray induced photoluminescence spectra, emission spectra, the multichannel energy spectrum and decay curve of γ-ray was characterized. The photoluminescence spectra of RbY2Cl7∶Ce show emission band centered at about 389 nm and excitation band centered at about 336 nm. The energy resolution of the resulting γ-ray peak is ~9.8% under γ-ray excitation of 137Cs source, and the scintillation decay time is about 35 ns.
俞云耀, 朱贺炳, 王昊宇, 耿巨峰, 潘建国, 潘尚可. RbY2Cl7∶Ce晶体的生长和闪烁性能研究[J]. 人工晶体学报, 2020, 49(5): 780. YU Yunyao, ZHU Hebing, WANG Haoyu, GENG Jufeng, PAN Jianguo, PAN Shangke. Growth and Scintillation Properties of RbY2Cl7∶Ce Crystal[J]. Journal of Synthetic Crystals, 2020, 49(5): 780.