近十年来，铀同位素分离方法发生了很大变化。
Great changes of uranium isotope separation methods have been made in the past 10 years.
研究了NP型螯合树脂珠作为质谱样品载体，对铀同位素进行热电离质谱分析的方法。
NP-type chelate resin beads is used as a carrier of samples in the isotopic measurements of uranium by mass spectrometry.
本文概述了激光分离同位素的一般原理和方法，并对分离铀同位素的方法和进展作了评述。
In this paper, a short outline of general principles and methods of laser isotope separation is discussed. A general review is made on methods and progress of uranium isotope separation.
水的铀同位素组分稳定，并应用混合比例计算了地下水资源量，其结果与常规方法计算结果完全一致。
The uranium isotopic compositions of water are quite stable, and the mixing ratio of water body has been use...
本文介绍了用(232u)作示踪同位素，测定岩石、土壤、水体中铀同位素及岩石中钍同位素比活度的方法。
This paper presents a determination method of specific activity for uranium isotope in rocks, soil, water and thorium isotope in rocks using 232u as a tracer isotope.
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
The uranium or plutonium isotopes are referred to as "fissile," which means we can use them to induce fission by bombarding them with free neutrons.
我们脚下深处是地狱般的岩石汤，在温度非常高的地球地幔中，有毒的铀、钍和钾元素的同位素释放出的辐射流不断地对这些岩石汤进行加热，使其保持高温。
Deep underneath your feet is a hellish stone soup, kept hot by a torrent of radiation from poisonous isotopes of uranium, thorium and potassium in the earth's superheated mantle.
为将燃料做成电能反应堆，铀被浓缩至U-235同位素含量5%以下。
To make fuel for electricity-generating reactors, uranium is enriched to less than 5 percent of the isotope U-235.
根据新协议，一年内，伊朗将向土耳其输送1200千克储备低纯度浓缩铀以交换其120千克浓缩铀（纯度约20%）用以生产药用（特别用于癌症的治疗）同位素的研究用反应堆。
Under the new deal, Iran says it would send 1,200 kg of its stockpile of low-enriched uranium to Turkey.
铀有许多不同的种类，或称同位素，而在核电站中所使用的是铀235这一类，因为这些的原子最容易一分为二。
There are different kinds, or isotopes, of uranium, and the type used in nuclear power plants is called uranium-235, because these atoms are easiest to split in two.
尤其必须立即采取行动，执行有关用伊朗自己提炼的低浓度浓缩铀为德黑兰作研究用的反应堆提供燃料的计划——该反应堆用于生产医用同位素。
In particular, prompt action is needed on implementing the plan to use Iran's own low-enriched uranium to refuel the Tehran research reactor, which is used to produce medical isotopes.
地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。
In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.
然而，有些含氙同位素的矿物并非如此，是由铀的放射性衰变产生的。
However, some of the minerals contain xenon isotopes unlike those usually produced by radioactive decay of uranium.
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
"The uranium or plutonium isotopes are referred to as" fissile, "which means we can use them to induce fission by bombarding them with free neutrons."
实验分析的数据首次表明：铀氧化物中的氧同位素主要是富轻氧的。
Data from the analytical results show that the oxygen isotopes in analysed uranium oxides is mostly light oxygen.
对放射性同位素衰变的测量，尤其是铀、锶、铷、氩和碳，可允许地质学家更精确地确定岩层的年龄。
The measurement of the decay of radioactive isotopes, especially uranium, strontium, rubidium, argon and carbon, has allowed geologists to more precisely determine the age of rock formations.
介绍了用同位素稀释质谱法测量辐照元件铀含量的方法。
The measurement methods of uranium concentrations in irradiated fuels by isotopic dilution mass spectrometry are described.
壳型花岗岩具较高的铅同位素比值和富铀铅贫钍铅的特点；
The crust granites have higher lead isotope ratios and are richer in uranium lead but poorer in thorium lead.
其稳定的同位素为铀和其它重金属放射衰变后的最终产物。
Its stable isotopes are all end products of radioactive decay of uranium and other heavy elements.
锕铀铀的同位素，原子质量数为235，与慢。
The isotope of uranium with mass number235, fissionable with slow neutrons.
同位素铀衰变通过阿尔法和贝塔过程中，类似的时间尺度这一核心。
The isotope 212bi decays through both alpha and beta processes that have similar time-scales for this nucleus.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
对沽源-多伦盆地火山岩类和花岗岩类进行了同位素地质年代学、地球化学和铀成矿条件的系统研究。
The results of systematic studies of geochronology, geochemistry and uranium metallogenic condition of volcanic rocks and granites in Guyuan-Duolun Basin are reported.
铀（U）元素就是一个很好的例子。天然铀有两种同位素；较轻的负235可以裂变，较重的铀238则不会裂变。
The prime example is the element uranium (U), which occurs naturally as two isotopes-the lighter, fissionable U-235 and the heavier, non-fissionable U-238.
在核保障环境取样分析中，对含铀单微粒进行元素和同位素分析是十分重要的。
In the safeguards environmental sampling, analyzing isotopic ratio of single uranium-bearing particle in swipe samples was very important.
根据铀-铅同位素体系演化原理论证了铀的活化成矿观点；
On the basis of principle of uranium-lead isotope system evolution, the viewpoint of uranium mobilized mineralization has been proved;
铅同位素研究揭示，该板块富铀、钍，从而为铀矿省的形成提供了必不可少的地质前提。
The plate is enriched in U and Th revealed by Pb-isotopic study, which plays an role of essential prerequisite for the formation of U province.
另一方面，氪-85是铀-235和钋-239的核裂变产物。 对氪-85的同位素含量测定可以用于监督国际核公约的执行情况。
On the other hand, analyses of 85 Kr, a fission product of uranium-235 and plutonium-239, can serve as a means to help verify compliance with the Nuclear Non-Proliferation Treaty.
以512矿床为例，研究了砂岩铀矿体铀、钍含量及其放射性同位素分布规律，由此讨论铀矿体的定位条件。
Exemplified by No. 512 uranium deposit, this paper discusses the delineation of ore bodies in sandstone type uranium deposits by uranium and thorium concentrations and their radioisotopes.
以512矿床为例，研究了砂岩铀矿体铀、钍含量及其放射性同位素分布规律，由此讨论铀矿体的定位条件。
Exemplified by No. 512 uranium deposit, this paper discusses the delineation of ore bodies in sandstone type uranium deposits by uranium and thorium concentrations and their radioisotopes.
应用推荐