红外与毫米波学报2009，Vol.28Issue(4)：263-266,4.
掺杂钨酸铅闪烁晶体的闪烁光学性质研究
STUDY ON THE SCINTILLATING PROPERTIES OF IONS DOPED LEAD TUNGSTATE SCINTILLATION CRYSTALS
摘要
Abstract
PbWO_4 and BaF_2 :PbWO_4 were grown by multi-crucible temperature gradient system.The transmittance spectra and x-ray excited luminescence spectra of as-grown PbWO_4, annealed PbWO_4 and annealed BaF_2: PbWO_4 were studied.The results reveal that these properties are related to the composition and growth arts of the crystals.The facts are complicated for the crystals annealing.In the wavelength range above 360nm,the transmittance for the annealed crystal is better than that of the as-grown crystal, while it is a little weaker than that of the as-grown crystal in the wavelength range of 320 ～360nm.For the x-ray excited luminescence spectra, the spectrum intensity of the annealed crystal is higher than that of as-grown crystal in the wavelength range above 380nm, while it is a little weaker than that of as-grown crystal in the wavelength range of 320～380nm.The doping ions improve the transmittance and the x-ray excited luminescence spectrum intensity.These phenomena are explained based on the relations of the defect, crystal growth arts and the optical properties of these crystals.For the BaF_2:PbWO_4 crystal, it' s peak shape and intensity of x-ray excited luminescence spectrum are evidently changed than PbWO_4 crystal.The phenomenon may relate to the fact that [WO_4]~(2-) tetrahedron of the crystal is degenerated when it is doped with F~- ions, and the degeneration will induce a new luminescent center.关键词
闪烁晶体/温度梯度法/透过光谱/畸变/X射线激发发光光谱Key words
scintillation crystal/temperature gradient technique/transmission spectrum/degeneration/x-ray excited luminescence spectrum分类
信息技术与安全科学引用本文复制引用
万尤宝,吴宇容,张建新,杨培志,肖林荣,杨辉..掺杂钨酸铅闪烁晶体的闪烁光学性质研究[J].红外与毫米波学报,2009,28(4):263-266,4.基金项目
浙江国际合作重大攻关项目(2006C14029)和浙江自然科学基金(Y105459)资助项目 （2006C14029）
