氟化钡(BaF2)晶体是已知响应最快的闪烁晶体，在高能物理、核物理及核医学等领域有着广泛的应用前景。抑制BaF2晶体的慢发光成分对其工程应用至关重要。本文利用坩埚下降法制备了高Y3+掺杂浓度5%、8%、10%(摩尔分数)的BaF2晶体，并采用Y3+与碱金属离子(Li+、Na+)共掺杂的方法形成电荷补偿阻止间隙F-的产生，制备了双掺杂型BaF2快响应闪烁晶体，进而基于优化的5 ns和2 500 ns时间门宽测试方法，研究了Y3+掺杂浓度以及Y3+与碱金属离子(Li+、Na+)共掺杂浓度对BaF2闪烁晶体快/慢成分比的影响规律。结果表明，生长的高浓度Y3+掺杂BaF2晶体的光学质量优异，在220 nm和300 nm处透过率分别高于90%和92%；随着Y3+掺杂浓度由0提高至10%，BaF2晶体的慢发光成分显著降低，快/慢成分比由0.15提高至1.21；生长的Y3+/Li+及Y3+/Na+共掺杂BaF2晶体的慢发光成分较Y3+掺杂BaF2晶体进一步降低，快/慢成分比最高分别可达1.63和1.61。研制的双掺杂BaF2快响应闪烁晶体有望应用于高能物理、核物理前沿实验等重要领域。

Barium fluoride (BaF2) crystal is known as the fastest scintillation crystal, which has a wide application prospect in high energy physics, nuclear physics and nuclear medicine. It is very important to suppress the slow luminescence component of BaF2 crystal for its engineering application. BaF2 crystals with high Y3+ doping concentration 5%, 8%, 10% (mole fraction) were prepared by Bridgman method, and the codoped BaF2 fast response scintillation crystals were prepared by codoping Y3+ with alkali metal ions (Li+, Na+) to form charge compensation to eliminate the generation of interstitial F-. Then, based on the optimized 5 ns and 2 500 ns time gate width measurement methods, the effects of Y3+ doping concentration and the codoping concentration of Y3+ and alkali metal ions (Li+, Na+) on the fast/slow component ratio of BaF2 scintillation crystal were studied. The results show that the optical quality of the high concentration Y3+ doped BaF2 crystals is excellent, and the transmittance at 220 nm and 300 nm is higher than 90% and 92%, respectively. With the increase of Y3+ doping concentration from 0 to 10%， the slow luminescence component of BaF2 crystal decrease significantly, and the fast/slow component ratio increase from 0.15 to 1.21. The slow luminescence component of the grown Y3+/Li+ and Y3+/Na+ codoped BaF2 crystals are further decrease compared with that of the Y3+ doped BaF2 crystals, and the highest fast/slow component ratios obtained are 1.63 and 1.61, respectively. The codoped BaF2 fast response scintillation crystal is expected to be applied in the frontier experiments of high energy physics and nuclear physics.