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摘要无源效率刻度法相较于传统的有源效率刻度法，有操作方便快捷无需标准源的优势，在活度测量中占有非常重要的地位。而我国目前在这方面的研究尚比较欠缺。国际上目前比较成熟的无源效率刻度软件是ISOSC 和lab SOSC。该软件自问世以来获得广泛好评，并且通过大量实验验证了其测量结果的准确性，该软件使用起来具有操作简洁，快速稳定的优点，且测得结果与传统的有源效率刻度基本一致。实验操作时采用HPGe探测器配合GammaClib软件对样品进行无源效率刻度分析，做出能量刻度曲线。在熟练掌握无源效率刻度中面源建模的方法后，通过计算验证无源效率刻度得到结果的准确性，并通过调试参数改变面源建模，分析讨论参数变化带来的无源效率刻度结果的变化。27619
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关键词：无源效率刻度， ISOSC,lab SOCS, HPGe谱仪,GammaClib，面源，参数
毕业论文设计说明书中文摘要
毕业设计说明书外文摘要
Title The study of plane source's activity measurement
Abstract
Compared to the traditional active efficiency calibration method, the passive efficiency calibration method has the advantages of convenient and fast operation with no standard sources demanding, which plays an important role in activity measurement. However, there is still a lack of study on this aspect in China. The ISOSC and lab SOSC are the comparatively mature passive efficiency calibration software in today's world. The software has won widespread acclaim since its advent. And its accuracy has been verified through a large number of experiments. The software has advantages of quickness and stableness with simple operation, and the tested result is generally consistent with the traditional active efficiency calibration. The HPGE detector coordinating with GammaClib software is employed to analyze the passive efficiency calibration deeply in the experiment operation so that the energy calibration curve can be marked. After having a good command of the passive efficiency calibration of plane source modeling method, analyze and discuss the changes of the result of the passive efficiency calibration brought by parameters variation. That adopts the means of verifying the passive efficiency calibration result's accuracy by calculating and debugging the parameter to change the plane source modeling.
Keywords: Passive efficiency calibration, Activity measurement,ISOSC, lab SOCS, HPGE spectrometer, Gammaclib, Plane source, Parameter.
目 次
1 绪论 1
1.1 无源效率刻度的目的及意义 1
1.2 国内外无源效率刻度研究现状 1
2 样品活度的测量方法 3
2.1 相对测量法 3
2.2 传统的有源效率刻度法 3
2.3 无源效率刻度法 3
3 无源效率刻度法简介 4
3.1 无源效率刻度法的原理 4
3.2 无源效率刻度法的优势 6
3.3 成熟的无源效率刻度软件 7
3.3.1 ISOCS 7
3.3.2 Lab SOCS 7
4 实验验证无源效率刻度的可靠性 8
4.1 实验设备介绍 8
4.1.1 HPGe谱仪实验表征情况 8
4.1.2 HPGe谱仪的工作原理 9
4.2 实验过程 10
4.3 能量刻度 11
4.4 实验用无源效率刻度软件简介 11
4.4.1 软件简介 11
4.4.2 软件使用方法 12
5 用无源效率刻度软件进行面源建模 17
5.1 实验中建模的具体过程示例 17