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DYs-92型低本底液体闪烁谱仪是DYS系列低本底液体闪烁计数器的换代产品。也是为满足测量极低含量的氚和碳-14环境样品而特殊设计的,该仪器还可测量氪-85、氯-36等其它环境放射性同位素以及示踪放射性同位素。DYS-92由主机内的Z80主板和286以上的PC微机控制运行,采用了新设计的电子学线路,并将线路与主机安装在一起,仅微机在外。软件有:测量运行程序,数据处理程序和能谱分析程序三大部分。在DYS-92中用锗酸铋(BGO)晶体作为反符合屏蔽。从用作反符合屏蔽的角度看,它具有体积小且整体重量轻且对γ射线的探测效率高等优点。测量时,正在测量的样品的全部实时信息均显示在微机的显示屏幕上。并能通过人机对话显示出本批样品中已测各样品的能谱以及已测得的各个数据。对于低水平样品来说,往往需要进行长时间的分段测量,这功能是非常有用的。由多道测出的能谱,计算机能自动计算出不同测量道的优值,有利于工作点的选择。特别在样品测量后,如果需要,还能改变测量道。无论用什么方法选择测量道,均能自动地计算出样品水中氚的浓度和碳-14样品的年代。依据能谱还能判断样品中是否存在发光、相分离和氡。
The DYs-92 Low Background Liquid Scintillation Spectrometer is a replacement for the DYS series of low background liquid scintillation counters. Specially designed to meet the very low levels of tritium and carbon-14 environmental samples, the instrument also measures other environmental radioisotopes such as krypton-85, chlorine-36, and tracer radioisotopes. DYS-92 by the host within the Z80 motherboard and PC control over 286 PC, using a new design of electronic circuits, and the line with the host installed together, only the computer outside. Software: measuring operation procedures, data processing procedures and energy spectrum analysis program three parts. In DYS-92 with germanium bismuth (BGO) crystal as anti-compliance shield. From the perspective of being used as an anti-conforming shield, it has the advantages of being small in size and light in weight, and having high detection efficiency for gamma rays. During measurement, all the real-time information of the sample being measured is displayed on the display of the microcomputer. And through man-machine dialogue shows the batches of samples have been measured in all samples of the energy spectrum and the measured data. For low-level samples, often need to be measured for a long period of time, this feature is very useful. Multi-channel measured by the spectrum, the computer can automatically calculate the merit of different measurement channels, is conducive to the choice of working point. Especially after the sample measurement, if necessary, can change the measurement track. Regardless of the method used to select the measurement track, the tritium concentration in the sample water and the age of the carbon-14 sample can be automatically calculated. Based on the energy spectrum can also determine the sample is there luminescence, phase separation and radon.