Zn2+共掺对Cs2LaLiBr6:Ce晶体闪烁性能的影响OA

Cs2LaLiBr6:Ce(CLLB:Ce)crystals exhibit excellent energy resolution and high light yield.However,their scintillation properties such as neutron/γ ray discrimination still require further improvement.In this study,CLLB:Ce crystals co-doped with different Zn2+concentrations,with a size of Φ10 mm×50 mm,were successfully pre-pared via the Bridgman method.This paper systematically investigates the effects of Zn2+co-doping on the crystal structure,scintillation properties,and defect characteristics of CLLB:Ce crystals.Thermoluminescence(TL)was used to analyze the position and quantity of defect energy levels in the crystals for different samples.Combined with temperature-dependent X-ray excited emission spectroscopy,the influence mechanism of defects on the scintillation mechanism was revealed.The results presented that the defect energy level was reconstructed after Zn2+co-doping.The scintillation process was tunable by adjusting the type and quantity of defect,and altering the fast/slow component ratio of decay time.With 0.1％Zn2+co-doping,the energy resolution was improved from 3.8％to 3.2％under 137Cs@662 keV gamma ray irradiation,better than that of LaBr3:Ce.The strategy of Zn2+co-doping is an effective method to enhance the scintillation properties of CLLB:Ce crystal.It is possible that the n/γ discriminate is improved by tuning the decay time.CLLB:Ce,Zn crystal has potential application prospects in the field of nuclear radiation detection.