查询词典 cesium

The Absolute frequency measurement is performed with the help of a femtosecond laser referenced to a commercial cesium atomic clock.

用一台以商用铯原子钟为基准的飞秒光频梳作为测量工具，对其频率进行了20次的精密测量，相对不确定度为5.0×10^(-14)。

Seven 1-iodoalkynes in yields of 78%~91% were synthesized by reaction of terminal alkyne s and cesium hydroxide in dry THF at room temperature for 3 h followed by treatment with iodine.

端炔与氢氧化铯在无水THF中于室温反应3h后与碘作用合成了7个炔基碘，收率78%~91%。

There are 8.6%~10.91% foreign matter in the sphenes, in which radioactive elements of strontium, cesium and uranium range from 4.26% to 4.58%. The change of structural cell parameters of sphenes is still very little,Δa=-0.0009 nm~0.0041 nm,Δb=0.0018 nm~0.0004 nm,Δc=0.0002 nm~0.0048 nm,Δβ=-0.10°~0.09° with high crystallinity of 99.27%~96.46%. Though, the age of sphene from the Fenghuang Mountain is about 1000 Ma, and experienced 775 Ma~1758 Ma geological evolvement and alpha decay, its crystallinity only decreased 3%, and its crystal shape and structure are still fine, indicating that sphene is of good ability to solidify radioactive elements. Therefore, sphenes are ideal minerals for solidifying nucleus waste.

通过对北祁连牛心山变质杂岩体中榍石(775Ma)和山西凤凰山花岗岩中榍石(1758Ma)的XRD及EDS等测试与研究，结果表明：两地榍石的杂质元素质量分数高达8.6%~10.91%，放射性核素锶、铯和铀的质量分数达4.26%~4.58%；晶胞参数的变化极小，△a=-0.0009nm~0.0041nm、△b=0.0018nm~0.0004nm、△c=0.0002nm~-0.0048nm、△β=-0.10°~0.09°，结晶度仍高达99.27%~96.46%，榍石经过10×10^8a的地质作用，结晶度仅减少了3%，显示榍石固化放射性系列核素的能力较强，虽经历了约775Ma~1758Ma的复杂地质演化及其所含放射性核素的衰变作用，其晶体结构完好，稳定性极高，是值得期待的理想核废物固化矿物。

It is important that studying gamma ray spectrometry of field rocks and soil in the earth抯 crust. Their energy range are mainly 30-3000keV, they contain abundant information of natural radioactive nuclides, such as uranium, thorium, potassium, etc, and of artificial radioactive nuclides from nuclear engineering activity, such as cesium, americium, cobalt, etc, and of the results in interaction between gamma ray and earth抯 crust.

国外近年已经生产出大于256道的伽玛射线能谱仪，但由于仪器应用滞后于仪器研究，且仪器稳谱未完全解决，获取全谱信息困难，加之对低能谱段的认识不足等原因，致使野外应用仍然滞留在仅限于测定铀钍钾含量的伽玛能谱测量水平上。

Experimental results show that the slow cesium atomic clock time a very small unit.

结果实验表明铯原子钟慢了很小的一个时间单位。

A rare mineral that is an important source of cesium .

一种稀有矿物，是铯的重要来源。

Cesium and organic alkali will occur with other similar reactions, but it's quite lively.

铯和有机物也会发生同其他碱金属相类似的反应，但它比较活泼。

In recent years, salt-mixed solvent system has become a very important system. And with the development of studies on rare alkali metal rubidium and cesium, it is significant to study the rubidium / cesium salt-mixed solvent system.

近年来，盐—混合溶剂已构成了一类重要的体系，且随着对重稀碱金属铷、铯的了解，人们发现研究铷、铯盐—混合溶剂体系有着极其重要的意义。

Some other candidates I recall were e-C, Safe C, C-square, C-cube, C-prime, C-star, and Cesium... Looking and those now I'm pretty happy with our choice.

其他一些我能回忆起来的候选名字还有e-C、Safe C、C-square、C-cube、C-prime、C-star和Cesium……回忆起这些，我现在还是为我们的选择感到高兴。

The laser optically pumped cesium magnetometer is a magnetic measurement instrument that is used to measure the absolute total intensity magnetic field, it is based on that the energy levels of cesium atoms in a magnetic field produces Zeeman effect and makes use of the principle that laser pumping and the RF magnetic field produce magneto-optical double resonance to make.

激光铯光泵磁力仪是一种用来测量磁场总强度的绝对磁测仪器，它是以铯原子的能级在磁场中产生塞曼效应为基础，利用激光泵浦和射频磁场产生光磁双共振的原理而制成的，激光泵浦铯原子是磁力仪结构的核心部分。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。