同位素成分

要避免使用那种非专用的同位素成分的铀化合物。

It is important to avoid the use of uranium compounds of unspecified isotopic composition .

钚同位素成分及总质量测量的可行性探讨

Feasibility Analysis on Isotopic Composition and Mass Measurement for Plutonium

水团混合及其稳定同位素成分的变化

Sea water mass mixing and the change of the total stable isotope component

我国部分地区降水中氧同位素成分与温度和降水量之间的关系

Relations of Oxygen Isotopic Composition in Precipitation with Temperature and Precipitation Amount in Some Regions of China

在天然海水&甲烷体系中，我们通过对水合物生成前后溶液中的Cl~-离子浓度和氢、氧同位素成分的分析，研究了天然气水合物形成过程中氢、氧同位素的分馏情况。

In the marine water-methane system , concentration changes of chlorine ion , hydrogen and oxygen isotope composition were determined .

西太平洋海山磷酸盐的常量、微量和稀土元素地球化学研究太平洋海山磷酸盐的锶同位素成分及形成年代

Research on Geochemical Characteristics of Major , Trace and Rare-Earth Elements in Phosphates from the West Pacific Seamounts Sr Isotopic Compositions and Age Dating of Marine Phosphates from Pacific Seamounts

针对蒙特卡罗程序不能计算燃料的同位素成分变化，提出将它和燃耗计算程序耦合以完成燃耗计算。

Since Monte Carlo code cannot be applied to calculate the isotopic composition of burned fuel , a new algorithm combined with the depletion code is proposed to calculate burnup .

作者首次对太平洋不同海山上与富钴结壳伴生的各种产状的磷酸盐的锶同位素成分及其形成年代进行了深入研究。

The aim of this study is to provide for the first time Sr isotopic compositions and age dating of different modes of phosphates dredged from different Pacific submarine guyots .

然后将实际的钚样品放入容器，通过容器外各种特征γ射线强度的测量可以推算出钚的同位素成分；

Once the relative efficiency ratio for the container is known , the isotopic components for plutonium can be induced by assigning the real γ ray source in the sample and analyzing the characteristic γ ray intensity outside the container .

根据结构、阴极发光特征、碳氧稳定同位素成分、主要元素和微量元素含量可以推测方解石胶结物形成于早成岩作用的还原条件下，方解石胶结物的沉淀使沉积物（岩）的孔隙减少；

Cathodoluminescence characteristics , carbon and oxygen isotopic composition , the contents of the main and trace elements , calcite cement formed in reducing condition during early diagenesis . Precipitation of calcite cement caused the decrease of porosity in sediments .

降水与冰川水δ~（18）O值的差异是由于氧同位素的成分与气温有关。

The difference of δ 18O values between the precipitation and the glacial water is attributed to the dependence of the oxygen isotope composition on the air temperature .

硫同位素和铅同位素成分显示，金来源于地幔和下地壳，与中生代的岩浆作用有关。

The characteristics of sulfur isotopic and lead isotopic composition show that the gold deposits in this area are derived from the mantle and deep crust and are related to Mesozoic magmatism .

放射性同位素动态功能测定仪放射性同位素成分的定量分析

Radioisotope dynamic-function testing equipment

同位素水文技术有三个方面的应用：水的各种环境同位素成分变化的应用（如在水资源开发中的应用），人工放射性示踪技术的应用及放射性仪表的应用。

Isotope hydrology is applied in three ways : the use of change in environmental isotopic composition of water ( especially used in water resources exploitation ), the use of artificial radioactive tracers and the use of radioisotope instruments .

对超高压变质岩中O、C、H等同位素的研究进一步表明，超高压变质作用过程中并无大规模流体活动，大气水的O同位素成分可被带到地幔深处而不改变；

Fluids were not active and oxygen isotope composition of meteoric water could be preserved during UHPM process , as is evidenced by O , C , and H isotope data ;