无机材料学报2024，Vol.39Issue(5)：539-546,8.DOI:10.15541/jim20230543
Zr4+共掺对Cs2LaLiBr6∶Ce晶体的中子/伽马甄别性能的影响
Effect of Zr4+Co-doping on Neutron/Gamma Discrimination of Cs2LaLiBr6∶Ce Crystals
摘要
Abstract
Neutron detection technology is widely used in homeland security,nuclear material security detection,and high energy physics,etc.Due to the shortage of 3He resources,it is urgent to develop a novel scintillator that can discriminate neutron and gamma.The Cs2LaLiBr6∶Ce(CLLB∶Ce)crystal has good neutron/gamma discrimination capacity,excellent energy resolution and high light yield,but its neutron/gamma discrimination performance needs further improvement.Here,the CLLB∶Ce crystals co-doped with Zr4+were grown successfully by the vertical Bridgman method.The results of different characterization methods prove that the Zr4+was successfully doped into the matrix and did not effect on the structure of host.Meanwhile,no new luminescence center was generated after Zr4+doping.The UV decay time is about 27 ns,presenting a fast fluorescence decay.Figure of merit(FOM)of CLLB∶Ce crystal is enhanced from 1.2 to 1.5 by co-doping Zr4+,which means that the neutron/gamma discrimination performance of CLLB∶Ce crystals is improved.Combined with the thermal stability and scintillation decay time,relationship between decay time and FOM was also analyzed.The co-doping of Zr4+can inhibit shallow electron trap and VK centers,reduce electron trapping-detrapping process,and greatly increase the probability of Ce3+direct capturing electron,which results in a shorter decay time.Data from this study indicate that the CLLB∶Ce crystals exhibit a huge application prospect in the field of neutron/gamma detection.关键词
闪烁晶体/CLLB∶Ce/中子/伽马甄别/钾冰晶石结构Key words
scintillation crystal/CLLB∶Ce/neutron/gamma discrimination/elpasolite structure分类
化学化工引用本文复制引用
郑中秋,魏钦华,童宇枫,唐高,尹航,秦来顺..Zr4+共掺对Cs2LaLiBr6∶Ce晶体的中子/伽马甄别性能的影响[J].无机材料学报,2024,39(5):539-546,8.基金项目
国家自然科学基金(12275262) （12275262）
国家重点研发计划项目(2022YFB3503600) （2022YFB3503600）
浙江省自然科学基金(LGG22E020001,Z23E020002)National Natural Science Foundation of China(12275262) （LGG22E020001,Z23E020002）
National Key R&D Program of China(2022YFB3503600) （2022YFB3503600）
Natural Science Foundation of Zhejiang(LGG22E020001,Z23E020002) （LGG22E020001,Z23E020002）
