Abstract
Elpasolite halides scintillation crystals have been proven to be very important materials for X-ray and γ-ray detector applications. The crystals of Cs2KLaCl6:4% Ce (CKLC) and Cs2KCeCl6 (CKCC) belong to novel scintillation of the Chloro-elpasolite crystal family. In this paper, the crystal growth of CKLC and CKCC crystals using the vertical Bridgman techniques were reported. The PXRD patterns showing both crystals have a cubic crystal structure. Both crystals have similar photoluminescence excitation and emission spectra, the fluorescence decay time of CKLC and CKCC crystals were about 49.7 and 33.8 ns. The energy resolution under the excitation of 662 keV γ-rays from a 137Cs source were found to be 6.6% and 5.2% (FWHM), respectively. The scintillation decay times of CKLC crystal were τ1 = 127 ns (33%) and τ2 = 1617 ns (67%), while that of CKCC crystal were τ1 = 2.86 ns (5%) and τ2 = 81 ns (95%).
Highlights
Scintillation crystal is widely used in security inspection, medical treatment, petroleum exploration, non-destructive inspection and other fields as component materials of radiation detection equipment [1,2,3,4,5,6,7,8,9]
The current research mainly focuses on the discovery of new pasolite family crystals with high energy resolution and fast decay time [18]
Cutting, grinding and polishing of the crystals was performed in a dry room, the samples of Cs2KLaCl6:4% Ce (CKLC) and CKCC crystals were saved in mineral oil in a glove box
Summary
Scintillation crystal is widely used in security inspection, medical treatment, petroleum exploration, non-destructive inspection and other fields as component materials of radiation detection equipment [1,2,3,4,5,6,7,8,9]. The current research mainly focuses on the discovery of new pasolite family crystals with high energy resolution and fast decay time [18]. The crystal growth, luminescence and scintillation characterizations of newly CKLC and CKCC single crystal are reported. Compared with other crystals in the elpasolite crystal family, the CKLC and CKCC crystal have smaller energy resolution, faster decay time. The study shows that both materials are a promising scintillator in the field of radiation detection especially CKCC crystal
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