SrSO_4:Eu磷光体的光释光特性  

Optically stimulated luminescence in SrSO_4:Eu phosphors

作　　者：唐强[1] 张纯祥[1] 梁宝鎏[2] 李德卉[2] 罗达玲[1] 

机构地区：[1]中山大学物理系,广州510275 [2]香港城市大学物理及材料科学系

出　　处：《物理学报》2005年第1期64-69,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号 :10 2 75 10 0 );高等学校博士学科点专项科研基金(批准号:2 0 0 2 0 5 5 80 15 );香港城市大学研究基金 (批准号:70 0 110 4;90 10 0 0 7)资助的课题~~

摘　　要：研究了通过掺杂得到的SrSO4 :Eu (0 1mol% )的粉末样品的光释光 (OSL)特性 .用90 Sr的 β射线辐照 0 116—1 16kGy后 ,测定了恒定光源激发的光释光发光曲线 (CW_OSL)和线性光源激发的光释光发光曲线 (LW_OSL) ,对发光曲线分析均得到了四种陷阱成分 .采用复合作用响应函数得到SrSO4 :Eu辐射剂量响应为线性 亚线性 .测量了温度对OSL信号的影响 ,结果表明OSL信号的温度稳定性很好 ,最灵敏读出温度约为 180℃ ,说明这时OSL信号来自热激发和光激发的共同作用 .用6 0 Coγ辐照 10 0Gy后 ,测量了热释光 (TL)三维光谱 ,确定了发光波长主要位于375nm ,可以确定这是来自于Eu2 +The optically stimulated luminescence (OSL) of SrSO4 :Eu (0.1 mol%) powder samples was studied. The continuous wave OSL and linearly modulated OSL curves measured after irradiation by beta rays of Sr-90 in the dose range of 0.116-1.16kGy, illustrate that there are four components in OSL signal and the OSL dose response is linear-sublinear. Thermal stability of OSL signal was also measured, and the results showed that OSL from SrSO4: Eu is quite stable at temperatures up to similar to 200degreesC Meanwhile, the intensity of OSL signal is strongest when the read temperature is about 180degreesC. The thermal luminescence (TL) three-dimensional spectra were measured after gamma rays irradiation (absorbed dose is 100Gy) of Co-60 source. The emission wavelength at about 375nm indicates that the luminescence comes from the transitions between energy levels of Eu2+.

关 键 词：发光 光释光 EU^2+ 线性 能级跃迁 磷光体 光谱 信号 CW 光特性 

分 类 号：O614[理学—无机化学]