密封容器中钚材料同位素丰度和年龄的测量  

Measurement of isotopic abundance and age of plutonium material in a sealed container

作　　者：刘素萍[1] 龚建[1] 郝樊华[1] 伍怀龙[1] 胡广春[1] 向永春[1] 迮仁德[1] 章建华[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核技术》2006年第3期229-233,共5页Nuclear Techniques

摘　　要：根据相对效率法的原理,利用PC/FRAM分析软件,开展了用高分辨γ谱仪测量密封容器中钚材料的同位素丰度和年龄的实验研究。研究结果表明,同位素丰度和年龄的分析精度随能谱测量精度的提高而提高,如果能谱的测量精度不够,通过PC/FRAM分析得出的钚材料的同位素丰度和年龄有偏低的可能。因此,在能谱测量过程中,建议通过监测某个特征峰的峰面积计数来判定239Pu丰度和年龄的测量精度是否已满足测量要求。Based on the concept of relative detection efficiency, some experiments have been conducted to measure the isotopic abundance and the age of the plutonium material in a sealed container by a high-resolution γ-ray spectrometer. The PC/FRAM software analyzes the spectra. The study shows that the analysis precision of the isotopic abundance and the age will rise as the spectral measurement precision increases, and that if the spectral measurement precision is not high enough, the analyzed results by the PC/FRAM software might be unsatisfactory. Hence, the study suggests that a spectral peak should be monitored to shed light on the spectral measurement precision during the spectrum acquisition process.

关 键 词：相对效率法 PC/FRAM 钚材料 同位素丰度 年龄 

分 类 号：TL27[核科学技术—核燃料循环与材料] TU33[建筑科学—结构工程]