钚同位素 meaning in Chinese

plutonium isotope

Standard test method for determination of plutonium isotopic composition by gamma - ray spectrometry
用射线光谱法测定钚同位素成分的标准试验方法
In order to meet the requirements of nda measurement , the laboratory of technical research for nuclear safeguards of china institute of atomic energy ( ciae ) , is being in charge of developing four sets of nda standards : one set of segmented gamma - ray scanner ( sgs ) uranium standard , one set of sgs plutonhim standard , one set of plutonium isotopic standard , and one set of active well coincidence counter ( awcc ) standard . in this dissertation some pivotal techniques on quality control in developing of nda nuclear standards above were emphatically studied
中国原子能科学研究院核保障技术重点实验室研制分段y扫描装置( sgs ： segmentedgamma - rayscanner )铀工作标准样品、 sgs钚工作标准样品、钚同位素标准样品和有源中子井型符合计数装置( awcc ： activewellcoincidencecounter )铀工作标准样品来满足核材料nda测量的要求。本论文重点对上述nda核标准样品研制过程中质量控制的一些关键技术进行了研究。