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- lead isotope abundance ratio 铅同位素含量比
- By this method the magnitude of isotope shift, isotope abundance ratio, Lorentz width and Doppler width of the spectral profile can be deduced. 由此可获得同位素效应的光谱线位移量、同位素的丰度比及其光谱线的洛仑兹宽度与多普勒宽度。
- Keywords lead;atmospheric aerosols;isotope abundance ratio; 铅;大气颗粒物;同位素丰度比;
- Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration, and a thermal surface ionization mass sepctrometry equipped with multicollector has been used. 采用全蒸发技术、离子流强度积分的方式，用多接收器热表面电离质谱计测量铀同位素丰度。
- Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration,and a thermal surface ionization mass sepctrometry equipped with multicollector has been used. 采用全蒸发技术、离子流强度积分的方式,用多接收器热表面电离质谱计测量铀同位素丰度。
- Determination of Isotope Abundance Ratio of Lead in Beijing Atmospheric Aerosol and Lead Source Study 北京冬季大气颗粒物中铅的同位素丰度比的测定和来源研究
- Eight equations computed isotopic abundance and two equations computed isotopic abundance ratio have been given. 给出八个计算丰度公式和两个计算同位素比公式。
- The isotopic abundance ratio and content are determined with isotopic mass-spectrometry. 文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量。
- The measurement method of the isotopic abundance ratios for the nanogram samarium was performed by Finnigan MAT 262-RPQ thermal ionization mass sepctrometer. 本文简介了使用Finnigan MAT 262热电离质谱仪对超微量钐天然同位素丰度比的精密测定。
- isotope abundance ratio 同位素丰度比, 同位素存在比
- Large quantities of analyses and statistics of gold abundance in different strata and locks combined with lead isotope data suggest that greenstone of Late Archean Xigudui Formation is the source bed of gold deposits. 通过铅、硫、氢、氧同位素以及不同层位、岩石金丰度的大量统计,成矿与构造、岩浆岩关系研究,表明金的成矿作用具有多来源、多成因、多阶段的特点,金矿有明显的层控性,晚太古代西?囟炎槁萄沂墙鸬目笤床恪 区域东西向复式背斜和南北向韧性剪切带分别控制了成矿区和矿田、矿床、矿体的分布。
- The stable variation of lead isotope compositions suggests that it belongs to normal lead. 铅同位素组成变化不大,属正常铅。
- And the study on application of lead isotope tracing for city environment pollution sources can get a good result. 铅同位素示踪理论应用于城市环境污染源的研究,能够取得比较理想的结果。
- The abundance ratio of D/H reaches 30% from 0.1%, and more than 90% from 10%. D浓度为0.;1%25的样品经装置浓缩后得到D浓度为30%25的产品;贫化部分D浓度小于10?5;
- The lead isotope study shows that ores of the Mujiazhuang copper deposit and the host rocks contain very high radiogenic lead. 研究表明，穆家庄铜矿矿石铅和近矿围岩岩石铅具有极高的放射性成因铅特点。
- isotopic abundance ratio 同位素丰度比 leaf/
- In recent years lead isotope tracing has been playing its unique role in studying the source and migration of heavy metals in soil. 近年来铅同位素示踪在研究土壤中相关重金属来源及其运移途径起到独特的作用。
- The studies on constant element, trace element, PEE and lead isotope indicate that the subalkalic intrusive complex body is formed by deep crust-mantle migmatization. 综合岩石和矿床的常量元素、微量元素、稀土元素及铅同位素等特徵，表明偏碱性侵入杂岩体是深部壳幔混合作用形成的；
- The sulfur and lead isotope compositions indicate that the ore_forming materials were mainly derived from the volcanic rocks and granodioritic porphyries. 硫_铅同位素指示成矿物质主要源于火山岩地层和花岗闪长斑岩脉。
- CHANG Xiang-yang,ZHU Bing-quan.Application of lead isotope method in estimates of seeking mine by chemic reconnoitring[J].Mineral Rock Geo-chemis-try Aviso,1997,16(4) :245 - 249. [2]常向阳;朱丙泉.;铅同位素方法应用于化探找矿评价[J]
