Abstract A series of Eu-doped BaAl2O4 crystals with different doping concentrations were grown by the floating zone technique, and the photoluminescence (PL) and scintillation properties were investigated. The samples exhibit PL and scintillation having a broad emission feature peaking around 500 nm, regardless of the concentration. From the spectral and decay time features, we confirm that the origin of the emission is the 5d-4f transitions of Eu2+. Determined by the pulse height analyses under 137Cs γ-ray irradiation, the scintillation light yields of the 0.1, 0.3, 1 and 3% Eu:BaAl2O4 crystals are 19,000, 22,000, 23,000 and 28,000 photons/MeV, respectively.

中文翻译：

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Eu:BaAl2O4 晶体的晶体生长和闪烁特性

摘要 采用浮区技术生长了一系列不同掺杂浓度的Eu掺杂BaAl2O4晶体，并研究了其光致发光（PL）和闪烁特性。无论浓度如何，样品都表现出 PL 和闪烁，具有在 500 nm 附近达到峰值的宽发射特征。从光谱和衰减时间特征，我们确认发射的起源是 Eu2+ 的 5d-4f 跃迁。通过 137Cs γ 射线照射下的脉冲高度分析确定，0.1、0.3、1 和 3% Eu:BaAl2O4 晶体的闪烁光产额分别为 19,000、22,000、23,000 和 28,000 光子/MeV。