无机材料学报2017，Vol.32Issue(4)：346-350,5.DOI:10.15541/jim20160381
GdI3∶Ce晶体的生长及其闪烁性能研究
Growth and Scintillation Properties of GdI3∶Ce Crystal
摘要
Abstract
Gadolinium iodide doped with Cerium (GdI3∶2％Ce) and undoped gadolinium iodide (GdI3) crystals were grown by vertical Bridgman method with sealed quartz crucible.Crystal ingots with dimension of φ15 mm×20 mm were cut and polished to be plates of 12 mm×10 mm×2.5 mm and 11 mm×8 mm×2.5 mm.GdI3∶2％Ce without crack and inclusion were encapsulated for all the measurements.X-ray diffraction analysis shows that the Ce3+-doped GdI3 and undoped GdI3 crystal have the same structure.X-ray and ultraviolet excited luminescence spectra of GdI3∶2％Ce present broad emission bands peaking at 520 nm and 550 nm,respectively,which correspond to 5d-4f transition luminescence of Ce3+.Three peaks located at 262,335 and 440 nm can be observed in excitation spectra when photoluminescence is monitored at 550 nm.The GdI3∶2％Ce crystal presents an excellent energy resolution of 3.4％ and decay time of (58±3) ns under excitation of 662 keV gamma-rays from 137Cs source.The results show the GdI3∶2％Ce crystal is a promising scintillator for gamma ray and neutron detection.关键词
GdI3∶2％Ce晶体/坩埚下降法/闪烁性能Key words
GdI3∶2％Ce crystal/Bridgman method/scintillation property分类
化学化工引用本文复制引用
叶乐,史坚,李焕英,陈晓峰,黄跃峰,徐家跃,任国浩..GdI3∶Ce晶体的生长及其闪烁性能研究[J].无机材料学报,2017,32(4):346-350,5.基金项目
青年科学基金(11305247) （11305247）
国家自然科学基金(51372256)National Science Foundation for Young Scientists of China (11305247) （51372256）
National Natural Science Foundation of China (51372256) （51372256）
