查询词典 photon

When photon acts as the medium of electric field, the photon will be polarized and called photonic polaron.

当光子作为电场的介质时，光子表现出极性，称为光极子

We pointed out again that the inclusion of the intrinsic transverse momentum distribution of partons leads to an enhancement of photon production cross section in the region of photon trans- verse momenta of a few GeV/c.

结果表明考虑部分子内禀横动量分布导致在光子横动量为几个GeV／c区域内光子产生截面的增加。

The model of photon-induced refractive index change based on GaAs materials is presented briefly, then the model based on GaAs/AIGaAs quantum wells materials is deeply analyzed by treating the effects of photon-excited carriers self-consistently. Furthermore, the propagation characteristics of multi-quantum well waveguide is invested, and the low-loss multi-quantum well rib waveguide deeply etched is also designed by using the spectral index method.

在简要分析了基于GaAs材料的光致折射率模型的基础上，通过自洽的方法，重点研究了基于GaAs/AlGaAs多量子阱材料的光致折射率模型；其次分析了量子阱波导传输特性，利用谱折射率法设计低损耗的深刻蚀脊形量子阱波导。

This dissertation is composed of three parts: The first part is the investigation on two-color two-photon MATI spectra of methyl-indoles and one-color two-photon MATI spectra of iso-bromopropane.

本文从内容上分为三个部分：第一部分是甲基吲哚分子和iso-C3H7Br的MATI光谱研究。

From the measured spectrum of He-like Al ions, we observed that the intensities of qr satellites were stronger than that of ijk satellites, and according to these observed satellite features, we have identified that photon ionization and photon excitation have very important effect on the ionization balance of these radiatively heated plasmas.

从测量得到的Al类氦离子发射光谱可以观察到，qr等伴线的强度明显高于ijk伴线的强度，由此可以确定出光子激发和电离过程对输运腔中等离子体的形成不可忽略。

This paper introduces the studies of the ultra-short Thomson scattering X-ray source at the accelerator laboratory of Tsinghua University in recent years. Properties such as the photon yield,the pulse length and time jitter of the produced photon pulse were predicted theoretically from the parameters of the electron bunch and the laser pulse,and the scattering angle. Preliminary experiments were successfully carried out with a 16 MeV backward-traveling-wave accelerator and the ns-Q switched laser provided by China Academy of Engineering Physics. This paper also introduces the 1.6-cell electron gun that was fabricated on site and the experiment with high RF power including the measurement of the electron bunche parameters. Based on these,we have designed an X-ray source,which is now under construction.

介绍了清华大学加速器实验室近年来关于汤姆逊散射超短X射线源的研究工作；研究了在任意散射角度下电子束参数和激光束参数对散射光子参数的影响，给出了散射光子的参数如光子产额、脉冲长度、时间抖动等与电子束参数、激光束参数和散射角度的关系；利用实验室已有的16 MeV反波行波加速器与中国工程物理研究院激光聚变研究中心提供的ns调Q激光搭建了汤姆逊散射初步实验平台并开展了实验研究；加工了1.6-cell光阴极微波电子枪，搭建了高功率实验平台，对产生的电子束参数进行了初步测量；对汤姆逊散射超短X射线源进行了设计并开展了相关的平台建设工作，对产生的X射线脉冲参数进行了模拟。

It is found that Kerr effect has a great influence on the non-classical photon statistics in the case of large single-photon detuning in the system.

结果表明：当单光子失谐量较大时，Kerr效应对光场与级联三能级原子非共振相互作用系统的光子非经典统计性质有较大影响。

The excimer laser produces radiation with high photon energy which is capable of breaking the molecular bonds to ablate the cornea directly.

ArF准分子激光由于光子能量大，可打断分子键，直接达到切割和消融角膜组织的目的。

Bone mineral content and bone width at the one-third part of distal radius at non-superiority side were assessed by single-photon absorptiometer, height and body mass were measured at the same time.

调查于2001-10/2002-11在重庆市3所学校（小学、中学和大学各1所）完成，3所学校以班级为抽样单位，选择健康儿童、青少年161名作为调查对象，均在调查前填写知情同意书。

This is a common phenomenon in semiconductors since the photon-excitation rate is the greatest at the absorption edge where the absorption index is fairly low and the dispersion is small.

激发光的主峰在吸收光谱的吸收边缘，这是由于在此条件下吸收指数相对低散射也很小，光子的激发速度最大）。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。