查询词典 excited

Atom, molecule or radical can be excited to a specific intermediate state by absorbing m laser photons, then the parent ion can be produced by absorption of another n laser photons. The ion yield can be increased drastically due to resonant absorption, comparing with the ion yield in non-resonant absorption. This multiphoton process is usully called Resonance Enhanced Multiphoton Ionization. REMPI technique plays an important role in detecting the high electronic excited states of atoms, molecules and radicals.

原子、分子、离子或自由基在同时吸收m个光子从下态共振跃迁到中间态后再吸收n个光子使其电离的过程中，下态和中间态的多光子共振吸收使得产生的离子信号强度比相应的非共振多光子电离得到的离子信号强度有很大的增强，该过程称为共振增强多光子电离REMPI。

All these observation furthers demonstrated the excited state properties of platinum polypyridyl acetylide complexes could be tuned by ancillary acetylide ligand. Proton or metal cation could be used as switch to change the order of the lowest excited state from LLCT to MLCT.

以上工作从另一角度再次证明，利用辅助配体的电子效应，能明显改善三联吡啶Pt络合物的激发态性质，其中质子或金属离子有效调节HOMO轨道的能量，实现了LLCT激发态向MLCT激发态的转换。

ABSTRACT The development history and current research state of pulsed discharge-excited alkaline-earth Metal Vapor Lasers were reviewed in detail in the paper. After all those multi-mechanism lines region from ultraviolet to infrared had been successfully obtained in our experiments, a consistent model has been build up for longitudinal pulsed discharge excited He-Sr vapor laser.

详细评述了脉冲放电激励的碱土金属蒸气激光的发展历史和现状，在实验上成功实现碱土金属多种机制从紫外到红外的多条激光谱线后，对纵向脉冲放电激励的He-Sr蒸气激光建立了一个完善的、自恰的激光动力学模型。

Because of different twist angle between the arene and aryl-bipyridine, Ppbpy displayed intermixing behaviors of local excited state (1La and 1Lb) and intramolecular charge transfer, but Apbpy only showed the properties of local excited state 1La.

由于芘和蒽与6－苯基-2， 2'-联吡啶间的夹角不同，Ppbpy的激发态具有原位激发态(1La and 1Lb)和分子内电荷转移的性质，而Apbpy的激发态仅仅表现出原位激发态1La 的性质。

Excited triplet state of [60]fullerene containing piperidinoxanthate dyad is at 690nm, which has lifetime of 23.7xs in Ar-saturated benzonitrile, whereas that ofparent C60 is at 750nm, with lifetime of 50s, indicating that excited triplet state of

富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm，相对于纯C_(60)发生蓝移用532nm激光激发后，富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm，相对于C_(60)的750nm发生蓝移，在氩气饱和的苯腈中寿命23.7μs，比C_(60)的55μs短，表明环加成反应连接的哌啶黄原酸酯部分具有吸电子性质。

To promote and apply this technology effectively, this article has studied the different excited frequency butt weld residual stress influence, namely carries on the vibration with the different excited frequency butt weld test sample.

为了更有效地推广和应用该项技术，本文研究了不同激振频率对焊接残余应力的影响，即用不同的激振频率对焊接试件进行振动。

Therefore, disease in the population has become more common recently. In view of this, submicron Negative-Ion powders and excited materials were adopted in this research. The submicron NI powders and excited material powders were treated with a dispersing agent and a ball mill used first, then it was blended evenly into water-borne polyurethane by a planetary deaerate stirring machine, and finally the water-borne PU composite films were coated onto release paper with a coating rod. The main purpose of this work is to manufacture a permanent composite film which is able to release NIs. Such film is expected to not only release amounts of NI but also absorb smells and effectively create fresh air.

有鉴於此，本研究采用次微米负离子粉体及激发材，先添加分散剂后利用球磨机做处理，再将次微米负离子粉体与激发材添加至水性聚氨基甲酸酯中，经由行星式脱泡搅拌机均匀混合，再以湿式涂布法，经由涂布棒涂布於离型纸上，脱膜后成复合薄膜，制备出於空气中释放负离子、吸收异味且清洁空气之永久型复合薄膜。

Concretely speaking, using the irreducible tensor theory, we deuced the formulism for fine-structure energies of boron-like atoms in the ground and first excited states, which involves spin-orbit, spin-spin and spin-other-orbit interactions; completing all the angular integrations and spin summations needed, we make the final expression for fine-structure energies of boron-like atoms in the ground and first excited states in a combination of radial integrations. Afterwards, employing the wave functions we got in Chapter Three, we accomplished all the radial integrations and so obtained the fine-structure energies.

具体地说，利用不可约张量理论导出了类硼离子基态以及第一激发态的精细结构的表达式，给出了自旋-轨道、自旋-自旋、自旋-其它轨道相互作用等所涉及的所有角向积分和自旋求和的解析计算方法，完成了角向积分、自旋求和的计算，使类硼离子基态以及第一激发态精细结构能级最终可以表示为径向积分之和；在此基础上利用以前所得到的非相对论性波函数，进一步完成了所有径向积分的计算，从而得到了对应能级的精细结构的理论计算值。

The Control System for Sealed-off and all-metal RF-excited CO_2 Lasers;2. An experimental study of 100W radio excited diffusively cooled all-metal rectangle waveguide CO_2 laser was carried out.

对新型百瓦级射频激励扩散型冷却全金属矩形波导CO2激光器进行了实验研究，实验中采用了CASE-I平行平面腔，试验结果表明，在采用10%透过率的输出镜时，激光输出最大功率达到146 W，电光转换效率达到17。

Beijing Institute of Technology, Beijing 100081,ChinaIn order to get the high output power, a RF excited diffusively cooled all-metal slab waveguide CO2 laser was reported, in which gas discharge region was constructed by two aluminum side walls and aluminum electrodes. The region dimension was 2 mm height×20 mm width×386 mm length, and the gas composition was CO2:N2:He:Xe=1:1:3:0.26. This technique replaced the old ceramic and metal sandwich waveguide technique.The optimum out power 127 W was achieved from the RF excited diffusively cooled all-metal slab waveguide CO2 laser with the longitudinal voltage uniformity distribution technique and scaling area technique. The electro-optic conversion efficiency was about 14%.

为了获得较高的激光输出功率，介绍了射频激励扩散冷却全金属板条波导CO2激光器，放电区域由左右两个铝合金壁和上下两个铝合金电极构成，放电区域高2 mm，宽20 mm，长386 mm，工作气体混合比CO2：N2：He：Xe=1：1：3：0.26，该技术代替了过去的金属陶瓷结构，结合纵向电压均匀分布技术和面增比技术，获得了127 W的激光输出功率，光电转换效率高达14%。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。