A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2
A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2
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DOI：
10.1016/j.optmat.2011.12.012
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发表时间：
2012-03
影响因子：
3.9
通讯作者：
V. Pustovarov;I. N. Ogorodnikov;A. Goloshumova;L. Isaenko;A. Yelisseyev
中科院分区：
文献类型：
--
作者：
V. Pustovarov;I. N. Ogorodnikov;A. Goloshumova;L. Isaenko;A. Yelisseyev
我们报告了利用具有时间分辨率的紫外和真空紫外光谱在9至450K温度范围内对现代闪烁材料SrI2:Eu2+的发光特性进行的实验研究。在中心内和带间激发（包括 X 射线激发）下研究了 2.85eV Eu2+ 离子的光致发光。 SrI2 晶体的带隙已根据所得结果进行了估计。在低于 100K 的温度范围内，3.4eV 处的本征发光被揭示，并且该发射带根据其特性被分配给 SrI2 中自俘获阴离子激子的发光。电子激发倍增效应的显着表现在高于2Eg的能量范围内。
We report experimental study of luminescent properties of modern scintillation material SrI2:Eu2+carried out over the temperature range from 9 to 450K by the means of the ultraviolet and vacuum ultraviolet spectroscopy with a time resolution. Photoluminescence of the Eu2+ions at 2.85eV was studied under both the intracenter and interband excitations, including an X-ray excitation. The bandgap of the SrI2crystal has been estimated on the basis of the obtained results. In the temperature range below 100K the intrinsic luminescence at 3.4eV was revealed and this emission band was assigned by its properties to the luminescence of self-trapped anionic excitons in SrI2. The pronounced manifestation of the effect of multiplication of electronic excitations was revealed in the energy range above 2Eg.