同位素丰度

更为有意义的是，清晰准确地检出新仙女本期气候冷干颤动事件，用同位素丰度变化拟合的降温幅度可达11C；

What is more significant is that the dry cold oscillation event of the Younger Dryas has been detected accurately and distinctly . The temperature-lowering amplitude produced by fitting of the isotope abundance change may attain 11 C.

质谱法测定同位素丰度的精密度和准确度

Precision and Accuracy about Measurement of Isotope Abundance by Mass Spectrometry

用中子活化分析法测定~（238）U/~（235）U同位素丰度比

Determination of ~ ( 238 ) u / ~ ( 235 ) u isotopic ratio by neutron activation analysis

为了测定土壤中痕量铀的同位素丰度比，对TOPO萃取色层分离环境样品中U的方法进行了探讨。

An efficient separation procedure for uranium from soils by TOPO chromatographic extraction has been developed .

TOPO萃取色层分离-ICP-MS法测定土壤中痕量铀的同位素丰度比

Determination of Uranium Isotopes Ratios in Soil by ICP-MS and TOPO Extraction Chromatography

~（62）Ni有较高的检测限，是因为它的同位素丰度偏低（3.71%）。

The detection limit of ~ ( 62 ) Ni is higher than that of the others due to its low isotopic abundance ( 3 . 71 % ) .

皮克量级钚同位素丰度比的TIMS分析

Analysis on the Isotopic Ratio of Picogram Pu by TIMS

采用高分辨电感耦合等离子体质谱技术（HRICPMS）分析了48个不同季节大气气溶胶颗粒样品中铅同位素丰度（A）比值，为中国城市铅污染源研究提供数据。

The results of lead isotope ratios in atmospheric aerosol determined by HR-ICP-MS is provided for the purpose of monitoring and assessment of current lead pollution in the urban atmosphere in China .

钚样品γ能谱94&104keV能区中有22条X及γ射线可用来提供其同位素丰度信息。

A multi-channel spectrum of plutonium samples measured by HPGe detector includes 22 γ or X-ray lines in the 94 & 104 keV energy range , which can be used to provide information on the abundances of plutonium isotopes .

同位素丰度及其分离时间是钚材料的两个重要属性，目前常用的分析分析软件是PC／Fram和MGA。

The concentration of isotopes and the last separation time from Americium-241 are two important attributes of Plutonium materials , and MGA and PC / Fram .

ISOCS在铀同位素丰度比测量中的应用

Application of ISOCS to measurement of isotopic abundance ratio of uranium

本文简介了使用FinniganMAT262热电离质谱仪对超微量钐天然同位素丰度比的精密测定。

The measurement method of the isotopic abundance ratios for the nanogram samarium was performed by Finnigan MAT 262-RPQ thermal ionization mass sepctrometer .

为了对环境监测提供有效、可靠的手段，在多接收电感耦合等离子体质谱（MC-ICP-MS）上建立了铀同位素丰度的分析方法。

In order to effectively and reliably monitor uranium in the environment , a uranium isotopic analysis method by multi-collector inductively-coupled plasma mass spectrometry ( MC-ICP-MS ) was established .

容器内铀同位素丰度的非破坏探测技术研究

A nondestructive analysis technique for isotopic composition of uranium in wastebins

铀同位素丰度精确测量的若干问题

Some Questions about Precise Measurement of Isotope Abundance of Uranium

论宇宙线中元素丰度和同位素丰度的反常

On the abnormities of the element and isotope abundances in cosmic rays

用于微量锂同位素丰度比测定的坩埚&热电离方法

A Crucible-Thermionic Method for Precise Isotopic Ratios Determination of Li

生产堆元件铀同位素丰度比和含量的测定

Determining of isotopic abundance ratio and content for reactor pins

同位素丰度和元素平均原子量计算程序；

Computative program of isotopic abundances and average atomic weights of elements .

基于中红外差频激光测量水汽分子同位素丰度

The Measurement of Water Vapor Isotope Based on Mid-Infrared Difference Frequency Generation

同位素丰度绝对测量及相对原子质量测定中的不确定度评估

Uncertainty Analysis of Absolute Measurement of Isotopic Abundances and Relative Atomic Mass

铁陨石及中铁陨石的稀有气体同位素丰度和放射性核素活度

Noble gas isotopic abundances and radionuclide activities of iron meteorites and mesosiderites

任意分子同位素丰度的计算及其在飞行时间质谱归属中的应用

Interpretation time of flight mass spectra by calculation intensity of isotope peaks

两种钚同位素丰度无损分析技术方法的实验比较研究

Comparative experimental study of two techniques for analyzing plutonium abundances

等离子体质谱法（ICP/MS）测量天然锇同位素丰度

Determination of Abundance of Natural Osmium by ICP / MS

11颗行星际尘粒中的锂、硼同位素丰度分析

An analysis of Li and B isotope abundance in eleven interplanetary dust particles

同位素丰度测定的活化法及其应用

Activation methods of determinative isotopic abundance and its application

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

铀同位素丰度的精确测定

A Precise and Accurate Determination for Uranium Isotope Abundance

使用胶体石墨技术测定铀同位素丰度比

Uranium Isotope Ratio Measurements Using a Colloidal Graphite Technique