中文摘要：

在实验室衍射仪平台上，开展了以富士公司SR-2025型成像板为样品的标定实验，获得了该样品随时间变化的信号强度衰退曲线．实验以铜靶X射线管为光源，经过三羟甲基甲胺晶体（Trihydroxymethylaminomethane，TAM）分光得到Cu_Ka单能特征辐射．在实验环境温度为（20±1）℃、光源稳定、成像板空间响应均匀、信号强度线性响应等条件下，在不同时刻对成像板上不同位置进行曝光，扫描后获得成像板对单能特征X射线的衰退曲线．对测到的衰退曲线进行数值拟合及不确定度分析，发现其与国外的研究结果符合得较好．实验数据表明，X射线光源的不稳定性为0．7％，成像板的空间非均匀性小于1％，并且对信号强度呈优异的线性响应；在Cu-Kd的8027．84eV能点处，成像板的衰退曲线呈指数形式η／（t）=0．36884·exp（-t／159．64756）＋0．63372缓慢衰减，在可见光屏蔽良好条件下曝光125min后X射线信号仍有80％的强度．

英文摘要：

Based on the X-ray diffraetometer in the lab, the calibration experiment of the tadmg curve ot the imaging plate （IP） was introduced. The type of the sample was Fuji SR-2025 and the concerned signals were X-rays, A Cu X-ray tube was used as the X-ray source in the experiment while a trihydroxymethylaminomethane （TAM） crystal was used to provide Ka monochromatic radiations. The type of IP scanner was BAS-5000 and the environment temperature was （20± 1） ℃. Under the conditions that the X-rays were stable, the spatial uniformity and the line response of the IP were examined well, and the fading curve of the IP was obtained by exposing the IP on different place in different time. Fitting analysis of the fading curve was carried out and the uncertainty was discussed. The experimental results show that the instability of X-ray source is 0.7 % and the spatial uniformity of IP is less than l%; excellent linear response of the sample is also proved; at the energy point of Cu-Ka 8 027.84 eV, the fading curve of the IP decreases slowly in exponential form η（t）=0. 36884 exp（--t- 159. 647 56）＋0. 633 72; the recorded signals remain 80% while 125 minutes after exposure with visible light shielding.