无机材料学报2017，Vol.32Issue(2)：163-168,6.DOI:10.15541/jim20160262
γ-CuI晶体的发光衰减时间和对X射线的能量响应
Fluorescent Decay Time and Energy Response of γ-CuI Crystal
摘要
Abstract
γ-CuI crystal was prepared by using slow solvent evaporation method.The optical transmission spectrum reveals that the crystal is transparent with band gap of 2.96 eV.Two near-band-edge emission peaks are located at 410 nm,430 nm,and an iodine related defect emission band near 720 nm of the crystal appear under UV excitation.The emission band near 720 nm can be suppressed by iodine annealing,while a new and relative strong near-band-edge emission peaked at 420 nm appears.Decay times of emission peaks and band ofγ-CuI crystals were measured by using streak camera.The results show that the decay times of all near-band-edge emission peaks are tens of picosecond,which indicates that γ-CuI crystal is one of the fastest scintillators,but the decay time of the emission band near 720 nm is mainly tens of nanosecond.γ-CuI crystal presents a near-band-edge emission peaked at 435 nm and a broad emission band near 680 nm under X-ray excitation.The energy response of the nearband-edge emission to X-ray shows that the emission has a relatively high response to X-ray when the X-ray energy is less than 49.1 keV.关键词
γ-CuI晶体/超快闪烁体/衰减时间/能量响应Key words
γ-CuI crystal/ultrafast scintillator/decay time/energy response to X-ray分类
数理科学引用本文复制引用
李锋锐,刘小林,刘波,黄世明,倪晨,顾牡,何徽,畅里华,温伟峰,李泽仁,陈亮,刘金良,欧阳晓平..γ-CuI晶体的发光衰减时间和对X射线的能量响应[J].无机材料学报,2017,32(2):163-168,6.基金项目
国家重大科学仪器设备开发专项项目(2011YQ13001902) （2011YQ13001902）
国家自然科学基金(11475128,91022002,11375129)Significant National Special Project of the Ministry of Science and Technology of China for Development of Scientific Instrument and Equipment (2011YQ13001902) （11475128,91022002,11375129）
National Natural Science Foundation of China (11475128,91022002,11375129) （11475128,91022002,11375129）
