Tl2LiYCl6:Ce: A New Elpasolite Scintillator
Tl2LiYCl6:Ce: A New Elpasolite Scintillator
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DOI：
10.1109/tns.2016.2627523
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发表时间：
2016-12-01
影响因子：
1.8
通讯作者：
Shah, K. S.
中科院分区：
文献类型：
--
作者：
Hawrami, R.;Ariesanti, E.;Shah, K. S.
本文报道了一种新型掺铈铊基γ-中子双模钾长石闪烁晶体Tl_2LiYCl_6：Ce（TLYC）的生长和性能评价。在662 keV（FWHM）的能量分辨率为4.2%，测量这种材料的样品。通过与用NaI：Tl收集的Cs-137光谱的比较，估计TLYC的γ射线诱导光产额为26，000 ph/MeV。在32 keV至1275 keV的能量范围内，该材料还显示出比LaBr 3：Ce和NaI：Tl更好的响应比例。单个热中子相互作用产生在1.9 MeVee的伽马等效能量处测量的峰值，对应于约47，000 ph/n的（中子诱导）光产额。在TLYC中从伽马射线相互作用获得的衰变时间测量为约57 ns，431 ns和1055 ns，中子相互作用测量值略短。这些差异允许γ-中子脉冲形状辨别（PSD），并且用TLYC测量的PSD品质因数（FOM）为2。
Tl2LiYCl6:Ce (TLYC), a new cerium doped-thallium based, dual mode gamma and neutron elpasolite scintillation crystal, has been grown and evaluated at RMD. Energy resolution of 4.2% at 662 keV (FWHM) is measured for samples of this material. From comparison with a Cs-137 spectrum collected with NaI:Tl, a gamma-ray induced light yield of 26,000 ph/MeV is estimated for TLYC. The material also shows better proportionality of response than both LaBr3:Ce and NaI: Tl in the energy range between 32 keV to 1275 keV. Single thermal neutron interactions produce a peak measured at a gamma equivalent energy of 1.9 MeVee, corresponding to a (neutron induced) light yield of approximately 47,000 ph/n. Decay times obtained from gamma-ray interactions in TLYC are measured at about 57 ns, 431 ns, and 1055 ns, with slightly shorter values measured for neutron interactions. These differences allow for gamma-neutron pulse shape discrimination (PSD) and a PSD Figure-of-Merit (FOM) of 2 is measured with TLYC.