| 1. | Absolute isotopic abundance measurement
绝对同位素丰度测量 |
| 2. | Test method for uranium and plutonium concentrations and isotopic abundances
铀和钚的浓度和同位素丰度的测试方法 |
| 3. | Standard test method for 238pu isotopic abundance by alpha spectrometry
用能谱测定法测定钚- 238同位素丰度的标准试验方法 |
| 4. | Standard test method for uranium and plutonium concentrations and isotopic abundances by thermal ionization mass spectrometry
用热电离质谱法进行铀和钚浓度和同位素丰度的标准试验方法 |
| 5. | Standard test method for isotopic abundance analysis of uranium hexafloride by multi - collector , inductively coupled plasma - mass spectrometry
多收集器感应耦合等离子质谱法分析六氟化铀同位素丰度的标准试验方法 |
| 6. | With the corrected parameter files , the results indicate that the isotopic abundance in the sample can be determined within 2 % error using a hpge detector system . artificial neural networks ( ann ) are a class of models based on neural computation and have been applied to the measurement of uranium enrichment . the principles of ann methods used in uranium measurement are presented in this paper and the conditions of analysis proceedings are described
在核保障核查测量中和实物监测中，测量对象往往是规格确定并种类有限的元件或部件，只需要关心测量对象的属性是否发生了变化，或者对同一种类的放射性样品的一致性做出判断，这种要求下使用神经网络方法是比较适宜的，并且神经网络方法是与探测器和探测效率无关的。 |
| 7. | It ' s a more accurate method in determining the isotopic abundance of uranium . the paper describes the measurement principles that allow accurate measurements to be taken on samples of arbitrary size , shape , and measurement geometry - and of arbitrary physical and chemical composition - through the use of know nuclear decay data ( half - lives and branching intensities ) . this method relies on internal gamma - ray peaks from the spectrum under analysis to self - calibrate the unknown spectrum for energy and peak shape
本工作首次分析了pc fram软件的算法并使用高纯锗探测器探测欧共体低浓铀标准样品，使用pc fram软件的缺省参数并不能得到准确的富集度值，通过大量的实验，本工作对铀富集度测量中的关键问题进行了初步的研究并给出了本实验室条件下准确分析铀富集度的修正参数和条件。 |
