摘要本课题研究的基本内容立足于对稀土废渣内的放射性核素进行定性定量分析。首先简要阐述了ORTEC高纯锗γ谱仪系统的基本操作，并对无源效率刻度的原理和方法进行了简单的说明。我国专家自主设计研发的无源效率刻度软件GammaCalib问世不久，在准确性方面的研究还鲜有发表。因此本实验先通过含有Ra、Th、K的混合标准源探究GammaCalib软件的精确性和实用性。实验分析表明，GammaCalib软件对不同核素的多个特征能量峰的模拟效率刻度值与参考值相对偏差结果范围在±16%以内，属于实验室可接受水平，验证了无源效率刻度方法的可靠性。最后通过无源效率刻度方法对中和渣和酸溶渣的放射性核素进行分析，结果表明两种废渣的比活度远远小于4×106Bq/kg，属于低放废渣。20559
关键词 GammaCalib 无源效率刻度 稀土 废渣 高纯锗γ谱仪 放射性核素分析
毕业论文设计说明书（论文）外文摘要
Low-level Radioactive Waste Radionuclides Analysis of Rare-Earth
Abstract
The basic content of this research is based on rare earths waste of radionuclides within the qualitative and quantitative analysis. First, briefly describes the basic operation of the ORTEC HPGe γ spectrometer system, and made the principles and methods of sourceless efficiency calibration for a simple introduction. Our expert independent design and development of sourceless efficiency calibration software GammaCalib come out soon, in terms of accuracy study also rarely published. . Therefore, t Therefore, this experiment first by containing Ra, Th, K mixed standard source to explore the accuracy and usefulness of the software GammaCalib. The results show that the efficiency of scale values and GammaCalib software for different nuclides multiple peaks characteristic energy simulation reference value relative deviation results within the range of ± 16%, belongs to an acceptable level in laboratory .The results verify the reliability of the sourceless efficiency calibration method . Finally, the sourceless efficiency calibration method for radionuclides of the acid slag and slag were analyzed showed that the specific activity of the two waste far less than 4× 106Bq/kg, low-level radioactive waste belongs.
Keywords GammaCalib Sourceless Efficiency Calibration Rare-Earth Residue HPGe γ Spectrometer Analysis Radionuclides
目 录
1 引言 1
1.1本课题的目的和意义 1
1.2 主要研究内容和方案设计 2
1.2.1 研究内容 2
本课题主要的研究内容主要有： 2
1.2.2 方案设计 2
1.3 仪器设备和材料 3
1.3.1 仪器设备及材料 3
1.3.2 样品采集与制备 4
2 γ能谱测量与分析方法 6
2.1高纯锗γ谱仪系统分析原理 6
2.1.2 ORTEC高纯锗γ谱仪 8
2.1.3 Canberra高纯锗γ谱仪 9
2.1.3γ谱的形成原理及构成 10
2.2 GammaVision数据分析处理简述[6] 11
2.3 无源效率刻度简介 15
2.2.4 GammaCalib简介 16
2.2.5 GammaCalib分析方法 17
3 GammaCalib精确性验证 17
3.3 混合标准源活度测量方法比较 18
3.4 结果分析与讨论 21
4 稀土废渣中核素分析 22
4.1 数据分析与处理 22
5 结论 29
致 谢 30
参考文献 31 低放稀土废渣放射性核素分析+文献综述:http://www.youerw.com/huaxue/lunwen_12382.html