Scintillation performance of the TlSr2I5 (Eu2+) single crystal
Scintillation performance of the TlSr2I5 (Eu2+) single crystal
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TlSr2I5(Eu2)单晶的闪烁性能
DOI：
10.1016/j.optmat.2018.05.036
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发表时间：
2018
影响因子：
3.9
通讯作者：
Sunghwan Kim
中科院分区：
文献类型：
--
作者：
H. Kim;G. Rooh;A. Khan;H. Park;Sunghwan Kim
TlSr_2I_5：Eu ~（2+）是一种新发现的闪烁体，在X射线和γ射线光谱学中具有良好的应用前景。采用两区垂直布里奇曼技术生长这种闪烁体。在室温下，在X射线激发下测量生长的晶体的发光特性。纯的和Eu 2+掺杂的晶体分别在445和670 nm之间（峰值在528 nm）和430-600 nm之间（峰值在463 nm）含有宽的发射带。在662 keV γ射线激发下，用~（137）Cs源研究了能量分辨率、光产额和衰变时间分布。掺Eu ~（2+）3 mol%时，能量分辨率为4.2%（FWHM）。对于相同的样品，还获得了70，000 ph/MeV的光产额。三个和两个衰减常数观察纯和Eu 2+掺杂的样品，分别在室温下。有效Z数和密度分别为61和5.30 g/cm 3。
TlSr2I5: Eu2+is a newly discovered scintillator that show promising scintillation properties for X- and γ-ray spectroscopy applications. Two zone vertical Bridgman technique is used for the growth of this scintillator. Luminescence properties of the grown crystals are measured under X-ray excitation at room temperature. Pure and Eu2+doped crystals contained broad emission bands between 445 and 670 nm peaking at 528 nm and 430–600 nm peaking at 463 nm, respectively. Energy resolution, light yield and decay time profiles are studied under 662 keV γ-ray excitation using137Cs radioactive source. Energy resolution of 4.2% (FWHM) is obtained for 3 mol% Eu2+doped crystal. For the same sample, light yield of 70,000 ph/MeV is also obtained. Three and two decay constants are observed for the pure and Eu2+doped samples, respectively at room temperature. Effective Z-number and density are found to be 61 and 5.30 g/cm3, respectively.