同位素

2A_1-~2B_1 electronic transition,molecular constant,rotational energy term,isotopic effect

2A_1-~2B_1电子态跃迁，分子常数，转动能级谱项，同位素效应

The isotopic ratio of the sample is finally obtained by correction of the IDMS measured value with the correction factor.

用校正因子校正样品和稀释剂的同位素丰度比的测量值，得到准确值。同时，评定了方法的不确定度。

Global correlation for strontium isotope curve in the Late Cretaceous of Tibet and dating marine sediments.

西藏晚白垩世锶同位素曲线的全球对比及海相地层的定年。

A thorough knowledge of the isotopic compositions of potential contaminants is essential for a proper evaluation of the role of country rock derived S in ore formation.

全面了解同位素组成的潜在混染对合理评价提供硫来源的围岩在矿石形成中的作用是非常必要的。

In this paper, the photoelectric coupler s apply in the system with band transmissio experiment has been presented.

介绍了光电耦合器在兰州在线同位素分离器终端上的带传输实验中的应用。

A radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known.

一种放射性超铀元素，用碳离子轰击锔而合成，已知有种同位素。

A synthetic element produced in trace quantities by helium isotope bombardment of curium.

一种合成元素，由氦同位素轰击锔可得到微量的这种元素。

Based on plentiful isotopic dating data and geological studies, the authors, in this paper, discuss the geological meanings of the two isotopic ages given by Lapierre et al., and conclude:① Mesozoic volcanic activities in Zhejiang are most frequent in 130～83 Ma, that is, from the early to late Cretaceous but not the late Jurassic;② The Jiande and Moshishan groups are nearly in the same period and not in an upper—lower stratigraphic relationship with each other;③ The period of 110～100 Ma is a transitional stage from the early high-K calc-alkaline dacite—rhyolite associated with diorite—granodiorite） to the late basalt—rhyolite（associated with K-feldspar granite—alkali granite）.

本文就Lapierre等文中124 Ma和97 Ma两个年龄的地质意义、幕次划分以及浙西与浙东火山岩时代对比作出评论，并厘定浙江中生代火山岩时代归属，提出：①浙江中生代火山活动时代为132～83 Ma；②浙西建德群与浙东磨石山群火山岩并不存在上下关系，地质接触关系、古生物组合和大量同位素定年数据都不支持Lapierre等的浙西与浙东火山活动幕次的对比方案；③ 110～100 Ma为早期高钾钙碱性英安岩—流纹岩（伴生闪长岩—花岗闪长岩）向晚期玄武岩—流纹岩（伴生钾长花岗岩—碱性花岗岩）过渡的转折期。

Petrological,geochemical and Nd,Sr,Pb isotopic studies indicate that the ore-hosting volcanic rocks of Xiongcun supperlarge copper-gold deposit in the Gangdese copper belt, Tibet belong to dacite porphyry with ultro-shallow emplacement.

岩石学、地球化学和Nd、Sr、Pb同位素研究表明，西藏冈底斯铜矿带雄村特大型铜金矿床的容矿火山岩为一套具超浅成侵入特点的英安斑岩，SiO2含量集中在61.97%～64.31%之间，富Na2O、低K2O， Na2O/K2O比值平均为5.25。

The morphology, occurrence and components of dawsonite were described, and the paragenetic sequence of sandstone and origin of CO2 forming dawsonite were investigated by polarization microscope, scanning electron microscope, Xray diffraction and MAT251 stable isotope mass spectrometer.

利用偏光显微镜、扫描电镜、X射线衍射分析仪和MAT251稳定同位素质谱仪，详细描述了片钠铝石的形貌、产状和成分，确定了含片钠铝石砂岩的成岩共生序列和形成片钠铝石的CO2的成因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。