A novel crystal scintillator of RbBa₂I₅:Eu${}^{2+}$ was grown by the Bridgman–Stockbarger method. Its luminescence and scintillation properties were investigated. Under X-ray excitation, the crystal demonstrates blue luminescence peaking at 436 nm associated with 4f⁶5d¹$\mathrm{\to }$ 4f⁷ radiative transitions of Eu${}^{2+}$ ions. The main X-ray luminescence decay constant is 800 ns. The light output of RbBa₂I₅:3%Eu${}^{2+}$ sample under 662 keV excitation is 58,200 ph/MeV.

中文翻译：

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新型Eu的生长和发光性质${}^{2+}$掺杂的RbBa ₂ I ₅闪烁体

新型的RbBa ₂ I ₅：Eu晶体闪烁体${}^{2+}$通过Bridgman–Stockbarger方法生长。研究了其发光和闪烁特性。在X射线激发下，晶体显示出与4f ⁶ 5d ¹有关的在436 nm处的蓝色发光峰。$\mathrm{\to }$f的4f ⁷辐射跃迁${}^{2+}$离子。主要的X射线发光衰减常数为800 ns。RbBa ₂ I ₅：3％Eu的光输出${}^{2+}$ 662 keV激发下的样品为58,200 ph / MeV。